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Arturo Gonzalez-Quiroga
UREMA Research Unit, Department of Mechanical Engineering, Universidad Del Norte, Barranquilla, Colombia

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Short communication
Published: 01 July 2021 in Case Studies in Thermal Engineering
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High ambient temperature negatively affects gas turbine performance, especially in a tropical climate. Cogeneration improves fuel utilization by taking advantage of the energy discharged as waste heat in the exhaust gases. This case study assesses the effects of high ambient temperature on the performance of a natural gas-based cogeneration plant in Barranquilla, Colombia, a location with a hot and humid tropical climate throughout the year with an annual average temperature of 27.4 °C. The cogeneration plant encompasses gas and vapor turbine generation, supplementary fire, waste heat recovery, and process heat exchange. Validated ASPENHYSYS® simulation allows comparing gas-turbine-alone indicators with those at ISO conditions, i.e., 15 °C and 101.3 kPa. Ambient temperature reduces gas turbine power output by up to 22% and decreases thermal efficiency by around 0.06% for every °C rise above ISO conditions. Cogeneration with and without supplementary fire increases power output by 17% and 5% compared to gas-turbine-alone operation. The energy utilization factor increases by 27–37% without supplementary fire and above 37% with supplementary fire. Results give insight into the challenges of cogeneration plants in a tropical climate. Further studies should include the effects of high humidity on power plant performance and the potential benefits of cooling inlet air.

ACS Style

Daniel Armando Pinilla Fernandez; Blanca Foliaco; Ricardo Vasquez Padilla; Antonio Bula; Arturo Gonzalez-Quiroga. High ambient temperature effects on the performance of a gas turbine-based cogeneration system with supplementary fire in a tropical climate. Case Studies in Thermal Engineering 2021, 26, 101206 .

AMA Style

Daniel Armando Pinilla Fernandez, Blanca Foliaco, Ricardo Vasquez Padilla, Antonio Bula, Arturo Gonzalez-Quiroga. High ambient temperature effects on the performance of a gas turbine-based cogeneration system with supplementary fire in a tropical climate. Case Studies in Thermal Engineering. 2021; 26 ():101206.

Chicago/Turabian Style

Daniel Armando Pinilla Fernandez; Blanca Foliaco; Ricardo Vasquez Padilla; Antonio Bula; Arturo Gonzalez-Quiroga. 2021. "High ambient temperature effects on the performance of a gas turbine-based cogeneration system with supplementary fire in a tropical climate." Case Studies in Thermal Engineering 26, no. : 101206.

Journal article
Published: 07 June 2021 in Applied Sciences
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Alternative fuels for internal combustion engines (ICE) emerge as a promising solution for a more sustainable operation. This work assesses combustion and performance of the dual-fuel operation in the spark ignition (SI) engine that simultaneously integrates acetone–butanol–ethanol (ABE) and hydroxy (HHO) doping. The study evaluates four fuel blends that combine ABE 5, ABE 10, and an HHO volumetric flow rate of 0.4 LPM. The standalone gasoline operation served as the baseline for comparison. We constructed an experimental test bench to assess operation conditions, fuel mode, and emissions characteristics of a 3.5 kW-YAMAHA engine coupled to an alkaline electrolyzer. The study proposes thermodynamic and combustion models to evaluate the performance of the dual-fuel operation based on in-cylinder pressure, heat release rate, combustion temperature, fuel properties, energy distribution, and emissions levels. Results indicate that ABE in the fuel blends reduces in-cylinder pressure by 10–15% compared to the baseline fuel. In contrast, HHO boosted in-cylinder pressure up to 20%. The heat release rate and combustion temperature follow the same trend, corroborating that oxygen enrichment enhances gasoline combustion. The standalone ABE operation raises fuel consumption by around 10–25 gkWh1 compared to gasoline depending on the load, whereas HHO decreases fuel consumption by around 25%. The dual-fuel operation shows potential for mitigating CO, HC, and smoke emissions, although NOx emissions increased. The implementation of dual-fuel operation in SI engines represents a valuable tool for controlling emissions and reducing fuel consumption while maintaining combustion performance and thermal efficiency.

ACS Style

Wilson Guillin-Estrada; Daniel Maestre-Cambronel; Antonio Bula-Silvera; Arturo Gonzalez-Quiroga; Jorge Duarte-Forero. Combustion and Performance Evaluation of a Spark Ignition Engine Operating with Acetone–Butanol–Ethanol and Hydroxy. Applied Sciences 2021, 11, 5282 .

AMA Style

Wilson Guillin-Estrada, Daniel Maestre-Cambronel, Antonio Bula-Silvera, Arturo Gonzalez-Quiroga, Jorge Duarte-Forero. Combustion and Performance Evaluation of a Spark Ignition Engine Operating with Acetone–Butanol–Ethanol and Hydroxy. Applied Sciences. 2021; 11 (11):5282.

Chicago/Turabian Style

Wilson Guillin-Estrada; Daniel Maestre-Cambronel; Antonio Bula-Silvera; Arturo Gonzalez-Quiroga; Jorge Duarte-Forero. 2021. "Combustion and Performance Evaluation of a Spark Ignition Engine Operating with Acetone–Butanol–Ethanol and Hydroxy." Applied Sciences 11, no. 11: 5282.

Journal article
Published: 06 June 2021 in Polymers
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The conservation and proper management of natural resources constitute one of the main objectives of the 2030 Agenda for Sustainable Development designed by the Member States of the United Nations. In this work, a hybrid strategy based on process integration is proposed to minimize freshwater consumption while reusing wastewater. As a novelty, the strategy included a heuristic approach for identifying the minimum consumption of freshwater with a preliminary design of the water network, considering the concept of reuse and multiple pollutants. Then, mathematical programming techniques were applied to evaluate the possibilities of regeneration of the source streams through the inclusion of intercept units and establish the optimal design of the network. This strategy was used in the shrimp shell waste process to obtain chitosan, where a minimum freshwater consumption of 277 t/h was identified, with a reuse strategy and an optimal value of US $5.5 million for the design of the water network.

ACS Style

Viviana Quintero; Arturo Gonzalez-Quiroga; Angel Gonzalez-Delgado. A Hybrid Methodology to Minimize Freshwater Consumption during Shrimp Shell Waste Valorization Combining Multi-Contaminant Pinch Analysis and Superstructure Optimization. Polymers 2021, 13, 1887 .

AMA Style

Viviana Quintero, Arturo Gonzalez-Quiroga, Angel Gonzalez-Delgado. A Hybrid Methodology to Minimize Freshwater Consumption during Shrimp Shell Waste Valorization Combining Multi-Contaminant Pinch Analysis and Superstructure Optimization. Polymers. 2021; 13 (11):1887.

Chicago/Turabian Style

Viviana Quintero; Arturo Gonzalez-Quiroga; Angel Gonzalez-Delgado. 2021. "A Hybrid Methodology to Minimize Freshwater Consumption during Shrimp Shell Waste Valorization Combining Multi-Contaminant Pinch Analysis and Superstructure Optimization." Polymers 13, no. 11: 1887.

Journal article
Published: 13 April 2021 in Biomolecules
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In this study, the inherent safety analysis of large-scale production of chitosan microbeads modified with TiO2 nanoparticles was developed using the Inherent Safety Index (ISI) methodology. This topology was structured based on two main stages: (i) Green-based synthesis of TiO2 nanoparticles based on lemongrass oil extraction and titanium isopropoxide (TTIP) hydrolysis, and (ii) Chitosan gelation and modification with nanoparticles. Stage (i) is divided into two subprocesses for accomplishing TiO2 synthesis, lemongrass oil extraction and TiO2 production. The plant was designed to produce 2033 t/year of chitosan microbeads, taking crude chitosan, lemongrass, and TTIP as the primary raw materials. The process was evaluated through the ISI methodology to identify improvement opportunity areas based on a diagnosis of process risks. This work used industrial-scale process inventory data of the analyzed production process from mass and energy balances and the process operating conditions. The ISI method comprises the Chemical Inherent Safety Index (CSI) and Process Inherent Safety Index (PSI) to assess a whole chemical process from a holistic perspective, and for this process, it reflected a global score of 28. Specifically, CSI and PSI delivered scores of 16 and 12, respectively. The analysis showed that the most significant risks are related to TTIP handling and its physical-chemical properties due to its toxicity and flammability. Insights about this process′s safety performance were obtained, indicating higher risks than those from recommended standards.

ACS Style

Samir Meramo-Hurtado; Nicolas Ceballos-Arrieta; Jose Cortes-Caballero; Jeffrey Leon-Pulido; Arturo Gonzalez-Quiroga; Ángel Gonzalez-Delgado. Inherent Safety Assessment of Industrial-Scale Production of Chitosan Microbeads Modified with TiO2 Nanoparticles. Biomolecules 2021, 11, 568 .

AMA Style

Samir Meramo-Hurtado, Nicolas Ceballos-Arrieta, Jose Cortes-Caballero, Jeffrey Leon-Pulido, Arturo Gonzalez-Quiroga, Ángel Gonzalez-Delgado. Inherent Safety Assessment of Industrial-Scale Production of Chitosan Microbeads Modified with TiO2 Nanoparticles. Biomolecules. 2021; 11 (4):568.

Chicago/Turabian Style

Samir Meramo-Hurtado; Nicolas Ceballos-Arrieta; Jose Cortes-Caballero; Jeffrey Leon-Pulido; Arturo Gonzalez-Quiroga; Ángel Gonzalez-Delgado. 2021. "Inherent Safety Assessment of Industrial-Scale Production of Chitosan Microbeads Modified with TiO2 Nanoparticles." Biomolecules 11, no. 4: 568.

Journal article
Published: 24 December 2020 in Energy
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Co-thermochemical conversion of coal and biomass can potentially decrease the use of fossil carbon and pollutant emissions. This work presents experimental results for the so-called top-lit updraft fixed bed reactor, in which the ignition front starts at the top and propagates downward while the gas product flows upwards. The study focuses on the ignition front propagation velocity for the co-thermochemical conversion of palm kernel shell and high-volatile bituminous coal. Within the range of assessed air superficial velocities, the process occurred under gasification and near stoichiometric conditions. Under gasification conditions increasing coal particle size from 7.1 to 22 mm decreased ignition front velocity by around 26% regardless of the coal volume percentage. Furthermore, increasing coal volume percentage and decreasing coal particle size result in product gas with higher energy content. For the operation near stoichiometric conditions, increasing coal volume percentage from 10 to 30% negatively affected the ignition front velocity directly proportional to its particle size. Additional experiments confirmed a linear dependence of ignition front velocity on air superficial velocity. Further steps in the development of the top-lit updraft technology are implementing continuous solids feeding and variable cross-sectional area and optimizing coal particle size distribution.

ACS Style

D.A. Quintero-Coronel; Y.A. Lenis-Rodas; L.A. Corredor; P. Perreault; A. Gonzalez-Quiroga. Thermochemical conversion of coal and biomass blends in a top-lit updraft fixed bed reactor: Experimental assessment of the ignition front propagation velocity. Energy 2020, 220, 119702 .

AMA Style

D.A. Quintero-Coronel, Y.A. Lenis-Rodas, L.A. Corredor, P. Perreault, A. Gonzalez-Quiroga. Thermochemical conversion of coal and biomass blends in a top-lit updraft fixed bed reactor: Experimental assessment of the ignition front propagation velocity. Energy. 2020; 220 ():119702.

Chicago/Turabian Style

D.A. Quintero-Coronel; Y.A. Lenis-Rodas; L.A. Corredor; P. Perreault; A. Gonzalez-Quiroga. 2020. "Thermochemical conversion of coal and biomass blends in a top-lit updraft fixed bed reactor: Experimental assessment of the ignition front propagation velocity." Energy 220, no. : 119702.

Journal article
Published: 26 June 2020 in Fuel
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This work contributes to improve the understanding of the link between the well-known integral method and the kinetics involved for predicting ignition delay time and knock occurrence crank angle. Extensions of the Relative Concentration of Chain Carriers method, originally developed for predicting ignition delay time under variable thermodynamic conditions of surrogate liquids fuels, were proposed. These extensions are composed of four formulations, which were deduced from the Glassman's kinetic model for predicting knock occurrence crank angle in spark-ignition engines fueled with gaseous fuels. Cases of study of engines fueled with CH4/H2, H2/CO/CO2 and iC8H18/nC7H16 mixtures under Spark Ignition and Homogeneous Charge Compression Ignition mode were considered to assess the performance of the formulations working with hydrogen peroxide (H2O2), formaldehyde (CH2O), hydroperoxyl (HO2) and hydroxyl (OH) as chain carriers. According to the experimental measurements of knock occurrence crank angle for mixtures of CH4/H2, the formulation 1 defined as CC/CCcrit=1, had the best performance working with H2O2 as a chain carrier. Moreover, to understand the role of the so-called chain carrier, a thermal sensitivity analysis, based on the relative contribution of key elementary reactions of the GriMech3.0 chemical kinetic mechanism on the total volumetric heat release rate was carried out. The analysis revealed that the elementary reactions that play an important role in the autoignition of a stoichiometric mixture of CH4/H2/50/50 were the chain propagating reactions R36, R116, and R168, the third body reactions R85 and R33, and finally, the chain branching reaction R119.

ACS Style

German Amador; Hernando A. Yepes; Arturo Gonzalez-Quiroga; Antonio Bula. Development of extended formulations of the relative concentration of chain carrier method for knock prediction in spark-ignited internal combustion engines fueled with gaseous fuels. Fuel 2020, 279, 118352 .

AMA Style

German Amador, Hernando A. Yepes, Arturo Gonzalez-Quiroga, Antonio Bula. Development of extended formulations of the relative concentration of chain carrier method for knock prediction in spark-ignited internal combustion engines fueled with gaseous fuels. Fuel. 2020; 279 ():118352.

Chicago/Turabian Style

German Amador; Hernando A. Yepes; Arturo Gonzalez-Quiroga; Antonio Bula. 2020. "Development of extended formulations of the relative concentration of chain carrier method for knock prediction in spark-ignited internal combustion engines fueled with gaseous fuels." Fuel 279, no. : 118352.

Journal article
Published: 19 May 2020 in Resources, Conservation and Recycling
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The Circular Economy comprises several strategies to enhance the sustainability of products. However, most of the research in this area has focused on Recycling, Recovering and final disposal. Strategies for lifespan extension such as Reuse, Repair, Refurbish, Remanufacture and Repurpose lead to higher circularity and value throughout the lifecycle but are less studied. Here we propose a single generic indicator based on durability and environmental footprint for material selection as an early step in the design process towards extending product lifespan. The material durability indicator or MDI integrates into a single calculation chemical and mechanical durability, together with environmental impacts associated with the material. The proposed indicator incorporates parameters such as flammability resistance, resistance to ultraviolet radiation, resistance to water, resistance to organic solvents, mechanical strength, energy consumption, and carbon footprint, among others. A case study based on polymer materials selection demonstrates the usefulness of the MDI indicator, providing a holistic calculation and comparison of selection alternatives, including conventional and multicriteria approaches. The proposed indicator offers a balanced and technical measurement of durability and environmental burdens in the material selection process and can potentially be applied to any engineering material.

ACS Style

Jaime Mesa; Arturo González-Quiroga; Heriberto Maury. Developing an indicator for material selection based on durability and environmental footprint: A Circular Economy perspective. Resources, Conservation and Recycling 2020, 160, 104887 .

AMA Style

Jaime Mesa, Arturo González-Quiroga, Heriberto Maury. Developing an indicator for material selection based on durability and environmental footprint: A Circular Economy perspective. Resources, Conservation and Recycling. 2020; 160 ():104887.

Chicago/Turabian Style

Jaime Mesa; Arturo González-Quiroga; Heriberto Maury. 2020. "Developing an indicator for material selection based on durability and environmental footprint: A Circular Economy perspective." Resources, Conservation and Recycling 160, no. : 104887.

Short communication
Published: 05 March 2020 in Case Studies in Thermal Engineering
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Diesel engines applications cover a broad spectrum, ranging from vehicles that transport passengers and move goods to specialized vehicles and equipment used in the construction and agriculture industries. However, diesel engines are a significant source of pollutant emissions that contribute to poor air quality, negative human health impacts, and climate change. This experimental case study develops emission maps based on statistical models for a single-cylinder, four-stroke, air-cooled diesel engine as a function of torque and engine speed. The tested fuels were 100% diesel (B0), and blends with 5% (B5) and 10% (B10) biodiesel originating from African oil palm (Elaeis guineensis). The study explores the individual contributions of NO and NO2 to NOx and discusses the correlation between CO and O2 emission maps. The statistical models of CO, CO2, and O2 feature R2 adjusted values greater than 0.8, while the models of NO and NO2 show R2 adjusted values of around 0.6. The apparent discrepancies in CO emission trends among previous studies are explained. The emission maps developed here are a practical alternative to predictive models and can assist in engine calibration and aftertreatment optimization while saving time and costs.

ACS Style

A. Mejía; M. Leiva; A. Rincón-Montenegro; Arturo González Quiroga; J. Duarte-Forero. Experimental assessment of emissions maps of a single-cylinder compression ignition engine powered by diesel and palm oil biodiesel-diesel fuel blends. Case Studies in Thermal Engineering 2020, 19, 100613 .

AMA Style

A. Mejía, M. Leiva, A. Rincón-Montenegro, Arturo González Quiroga, J. Duarte-Forero. Experimental assessment of emissions maps of a single-cylinder compression ignition engine powered by diesel and palm oil biodiesel-diesel fuel blends. Case Studies in Thermal Engineering. 2020; 19 ():100613.

Chicago/Turabian Style

A. Mejía; M. Leiva; A. Rincón-Montenegro; Arturo González Quiroga; J. Duarte-Forero. 2020. "Experimental assessment of emissions maps of a single-cylinder compression ignition engine powered by diesel and palm oil biodiesel-diesel fuel blends." Case Studies in Thermal Engineering 19, no. : 100613.

Research article
Published: 19 June 2019 in Industrial & Engineering Chemistry Research
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The process intensification abilities of gas-solid vortex units (GSVU) are very promising for gas-solid processes. By working in a centrifugal force field, much higher gas-solid slip velocities can be obtained compared to gravitational fluidized beds, resulting in a significant increase in heat and mass transfer rates. In this work, local azimuthal and radial particle velocities for an experimental GSVU are simulated using the Euler-Euler framework in OpenFOAM® and compared with PIV measurements. With the validated model, the effect of the particle diameter, number of inlet slots and reactor length on the bed hydrodynamics is assessed. Starting from 1g-Geldart-B type particles, increasing the particle diameter or density, increasing the number of inlet slots or increasing the gas injection velocity leads to an increased bed stability and uniformity. However, a tradeoff has to be made since increased bed stability and uniformity lead to higher shear stresses and attrition.

ACS Style

Laurien A. Vandewalle; Arturo Gonzalez-Quiroga; Patrice Perreault; Kevin Marcel Van Geem; Guy B. Marin. Process Intensification in a Gas–Solid Vortex Unit: Computational Fluid Dynamics Model Based Analysis and Design. Industrial & Engineering Chemistry Research 2019, 58, 12751 -12765.

AMA Style

Laurien A. Vandewalle, Arturo Gonzalez-Quiroga, Patrice Perreault, Kevin Marcel Van Geem, Guy B. Marin. Process Intensification in a Gas–Solid Vortex Unit: Computational Fluid Dynamics Model Based Analysis and Design. Industrial & Engineering Chemistry Research. 2019; 58 (28):12751-12765.

Chicago/Turabian Style

Laurien A. Vandewalle; Arturo Gonzalez-Quiroga; Patrice Perreault; Kevin Marcel Van Geem; Guy B. Marin. 2019. "Process Intensification in a Gas–Solid Vortex Unit: Computational Fluid Dynamics Model Based Analysis and Design." Industrial & Engineering Chemistry Research 58, no. 28: 12751-12765.

Journal article
Published: 18 June 2019 in Powder Technology
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Processes requiring intensive interfacial momentum, mass and heat exchange between gases and particulate solids can be greatly enhanced by operating in a centrifugal field. This is realized in the Gas-Solid Vortex Reactor (GSVR) with centrifugal accelerations up to two orders of magnitude higher than the Earth's gravitational acceleration. Here, the flow patterns of two 1g-Geldart B-type particles are experimentally assessed, over the gas inlet velocity range 82–126 m s−1, in an 80 mm diameter and 15 mm height GSVR. The particles are monosized aluminum spheres of 0.5 mm diameter, and walnut shell in the sieve fraction 0.50–0.56 mm and aspect ratio 1.3 ± 0.2. Two dimensional Particle Image Velocimetry combined with Digital Image Analysis and pressure measurements revealed that periodic fluctuations in solids azimuthal and radial velocity between gas inlet slots are strongly related to the average solids azimuthal velocity and bed uniformity. Aluminum particles feature steeper changes in azimuthal velocity and more attenuated changes in radial velocity than walnut shell particles. Within the assessed gas inlet velocity range the solids bed of aluminum exhibits average azimuthal velocities and bed voidages 40–50% and ≈10% lower than those of walnut shell. The aerodynamic response time of the particles, i.e. ρsdp2/18μg, emerged as an important parameter to assess the influence of the carrier gas jet on the radial deflection of the particles and the interaction solids bed-outer wall. Too low aerodynamic response time relates to nonuniformity in bed voidage due to solids radial velocity fluctuations. Excessive aerodynamic response time indicates low solids azimuthal velocities due to solids bed-outer wall friction.

ACS Style

Arturo Gonzalez-Quiroga; Shekhar R. Kulkarni; Laurien Vandewalle; Patrice Perreault; Chitrakshi Goel; Geraldine J. Heynderickx; Kevin M. Van Geem; Guy B. Marin. Azimuthal and radial flow patterns of 1g-Geldart B-type particles in a gas-solid vortex reactor. Powder Technology 2019, 354, 410 -422.

AMA Style

Arturo Gonzalez-Quiroga, Shekhar R. Kulkarni, Laurien Vandewalle, Patrice Perreault, Chitrakshi Goel, Geraldine J. Heynderickx, Kevin M. Van Geem, Guy B. Marin. Azimuthal and radial flow patterns of 1g-Geldart B-type particles in a gas-solid vortex reactor. Powder Technology. 2019; 354 ():410-422.

Chicago/Turabian Style

Arturo Gonzalez-Quiroga; Shekhar R. Kulkarni; Laurien Vandewalle; Patrice Perreault; Chitrakshi Goel; Geraldine J. Heynderickx; Kevin M. Van Geem; Guy B. Marin. 2019. "Azimuthal and radial flow patterns of 1g-Geldart B-type particles in a gas-solid vortex reactor." Powder Technology 354, no. : 410-422.

Particle technology and fluidization
Published: 19 April 2019 in AIChE Journal
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Vortex units are commonly considered for various single and multiphase applications due to their process intensification capabilities. The transition from gas‐only flow to gas‐solid flow remains largely unexplored nonetheless. During this transition, primary flow phenomenon, jets, and secondary flow phenomena, counterflow and backflow, are substantially reduced, before a rotating solids bed is established. This transitional flow regime is referred to as the vortex suppression regime. In the present work, this flow transition is identified and validated through experimental and computational studies in two vortex units with a scale differing by a factor of 2, using spherical Aluminium and Alumina particles. This experimental data supports the proposed theoretical particle monolayer solids loading that allows estimation of vortex suppression regime solids capacity for any vortex unit. It is shown that the vortex suppression regime is established at a solids loading theoretically corresponding to a monolayer being formed in the unit for 1g‐Geldart D‐ and 1g‐Geldart B‐type particles. The model closely agrees with experimental vortex suppression range for both Aluminium and Alumina particles. The model, as well as the experimental data, show that the flow suppression regime depends on unit dimensions, particle diameter and particle density but is independent of gas flow rate. This combined study, based on experimental and computational data and on a theoretical model, reveals the vortex suppression to be one of the basic operational parameters to study flow in a vortex unit and that a simple monolayer model allows to estimate the needed solids loading for any vortex device to induce this flow transition. This article is protected by copyright. All rights reserved.

ACS Style

Shekhar R. Kulkarni; Arturo Gonzalez‐Quiroga; Manuel Nuñez; Cedric Schuerewegen; Patrice Perreault; Chitrakshi Goel; Geraldine J. Heynderickx; Kevin M. Van Geem; Guy B. Marin. An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units. AIChE Journal 2019, 65, 1 .

AMA Style

Shekhar R. Kulkarni, Arturo Gonzalez‐Quiroga, Manuel Nuñez, Cedric Schuerewegen, Patrice Perreault, Chitrakshi Goel, Geraldine J. Heynderickx, Kevin M. Van Geem, Guy B. Marin. An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units. AIChE Journal. 2019; 65 (8):1.

Chicago/Turabian Style

Shekhar R. Kulkarni; Arturo Gonzalez‐Quiroga; Manuel Nuñez; Cedric Schuerewegen; Patrice Perreault; Chitrakshi Goel; Geraldine J. Heynderickx; Kevin M. Van Geem; Guy B. Marin. 2019. "An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units." AIChE Journal 65, no. 8: 1.

Research article
Published: 05 June 2018 in Energy & Fuels
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The process intensification possibilities of a gas–solid vortex reactor have been studied for biomass fast pyrolysis using a combination of experiments (particle image velocimetry) and non-reactive and reactive three-dimensional computational fluid dynamics simulations. High centrifugal forces (greater than 30g) are obtainable, which allows for much higher slip velocities (>5 m s–1) and more intense heat and mass transfer between phases, which could result in higher selectivities of, for example, bio-oil production. Additionally, the dense yet fluid nature of the bed allows for a relatively small pressure drop across the bed (∼104 Pa). For the reactive simulations, bio-oil yields of up to 70 wt % are achieved, which is higher than reported in conventional fluidized beds across the literature. Convective heat transfer coefficients between gas and solid in the range of 600–700 W m–2 K–1 are observed, significantly higher than those obtained in competitive reactor technologies. This is partly explained by reducing undesirable gas–char contact times as a result of preferred segregation of unwanted char particles toward the exhaust. Experimentally, systematic char entrainment under simultaneous biomass–char operation suggested possible process intensification and a so-called “self-cleaning” tendency of vortex reactors.

ACS Style

Shekhar R. Kulkarni; Laurien A. Vandewalle; Arturo Gonzalez-Quiroga; Patrice Perreault; Geraldine J. Heynderickx; Kevin M. Van Geem; Guy B. Marin. Computational Fluid Dynamics-Assisted Process Intensification Study for Biomass Fast Pyrolysis in a Gas–Solid Vortex Reactor. Energy & Fuels 2018, 32, 10169 -10183.

AMA Style

Shekhar R. Kulkarni, Laurien A. Vandewalle, Arturo Gonzalez-Quiroga, Patrice Perreault, Geraldine J. Heynderickx, Kevin M. Van Geem, Guy B. Marin. Computational Fluid Dynamics-Assisted Process Intensification Study for Biomass Fast Pyrolysis in a Gas–Solid Vortex Reactor. Energy & Fuels. 2018; 32 (10):10169-10183.

Chicago/Turabian Style

Shekhar R. Kulkarni; Laurien A. Vandewalle; Arturo Gonzalez-Quiroga; Patrice Perreault; Geraldine J. Heynderickx; Kevin M. Van Geem; Guy B. Marin. 2018. "Computational Fluid Dynamics-Assisted Process Intensification Study for Biomass Fast Pyrolysis in a Gas–Solid Vortex Reactor." Energy & Fuels 32, no. 10: 10169-10183.

Research article
Published: 23 January 2018 in Energy & Fuels
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Steam cracking of crude oil fractions gives rise to substantial amounts of a heavy liquid product referred to as pyrolysis fuel oil (PFO). To evaluate the potential use of PFO for production of value-added chemicals, a better understanding of the composition is needed. Therefore, two PFO’s derived from naphtha (N-PFO) and vacuum gas oil (V-PFO) were characterized using elemental analysis, SARA fractionation, nuclear magnetic resonance (NMR) spectroscopy, and comprehensive two-dimensional gas chromatography (GC × GC) coupled to a flame ionization detector (FID) and time-of-flight mass spectrometer (TOF-MS). Both samples are highly aromatic, with molar hydrogen-to-carbon (H/C) ratios lower than 1 and with significant content of compounds with solubility characteristics typical for asphaltenes and coke (i.e. n-hexane insolubles). The molar H/C ratio of V-PFO is lower than the one measured for N-PFO, as expected from the lower molar H/C ratio of the VGO. On the other hand, the content of n-hexane insolubles is lower in V-PFO compared to the one in N-PFO (i.e., 10.3 ± 0.2 wt % and 19.5 ± 0.5 wt %, respectively). This difference is attributed to the higher reaction temperature applied during naphtha steam cracking, which promotes the formation of poly aromatic cores and at the same time scission of aliphatic chains. The higher concentrations of purely aromatic molecules present in N-PFO is confirmed via NMR and GC × GC–FID/TOF-MS. The dominant chemical family in both samples are diaromatics, with a concentration of 28.6 ± 0.1 wt % and 27.8 ± 0.1 wt % for N-PFO and V-PFO, respectively. Therefore, extraction of valuable chemical industry precursors such as diaromatics and specifically naphthalene is considered as a potential valorization route. On the other hand, hydro-conversion is required to improve the quality of the PFO’s before exploiting them as a commercial fuel.

ACS Style

Nenad D. Ristic; Marko R. Djokic; Elisabeth Delbeke; Arturo Gonzalez-Quiroga; Christian V. Stevens; Kevin M. Van Geem; Guy B. Marin. Compositional Characterization of Pyrolysis Fuel Oil from Naphtha and Vacuum Gas Oil. Energy & Fuels 2018, 32, 1276 -1286.

AMA Style

Nenad D. Ristic, Marko R. Djokic, Elisabeth Delbeke, Arturo Gonzalez-Quiroga, Christian V. Stevens, Kevin M. Van Geem, Guy B. Marin. Compositional Characterization of Pyrolysis Fuel Oil from Naphtha and Vacuum Gas Oil. Energy & Fuels. 2018; 32 (2):1276-1286.

Chicago/Turabian Style

Nenad D. Ristic; Marko R. Djokic; Elisabeth Delbeke; Arturo Gonzalez-Quiroga; Christian V. Stevens; Kevin M. Van Geem; Guy B. Marin. 2018. "Compositional Characterization of Pyrolysis Fuel Oil from Naphtha and Vacuum Gas Oil." Energy & Fuels 32, no. 2: 1276-1286.

Journal article
Published: 01 December 2017 in Chemical Engineering Journal
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ACS Style

Arturo González Quiroga; Pieter A. Reyniers; Shekhar Kulkarni; Maria M. Torregrosa; Patrice Perreault; Geraldine Heynderickx; Kevin M. Van Geem; Guy B. Marin. Design and cold flow testing of a Gas-Solid Vortex Reactor demonstration unit for biomass fast pyrolysis. Chemical Engineering Journal 2017, 329, 198 -210.

AMA Style

Arturo González Quiroga, Pieter A. Reyniers, Shekhar Kulkarni, Maria M. Torregrosa, Patrice Perreault, Geraldine Heynderickx, Kevin M. Van Geem, Guy B. Marin. Design and cold flow testing of a Gas-Solid Vortex Reactor demonstration unit for biomass fast pyrolysis. Chemical Engineering Journal. 2017; 329 ():198-210.

Chicago/Turabian Style

Arturo González Quiroga; Pieter A. Reyniers; Shekhar Kulkarni; Maria M. Torregrosa; Patrice Perreault; Geraldine Heynderickx; Kevin M. Van Geem; Guy B. Marin. 2017. "Design and cold flow testing of a Gas-Solid Vortex Reactor demonstration unit for biomass fast pyrolysis." Chemical Engineering Journal 329, no. : 198-210.

Journal article
Published: 21 September 2017 in Entropy
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Low-grade heat sources such as solar thermal, geothermal, exhaust gases and industrial waste heat are suitable alternatives for power generation which can be exploited by means of small-scale Organic Rankine Cycle (ORC). This paper combines thermodynamic optimization and economic analysis to assess the performance of single and dual pressure ORC operating with different organic fluids and targeting small-scale applications. Maximum power output is lower than 45 KW while the temperature of the heat source varies in the range 100–200 °C. The studied working fluids, namely R1234yf, R1234ze(E) and R1234ze(Z), are selected based on environmental, safety and thermal performance criteria. Levelized Cost of Electricity (LCOE) and Specific Investment Cost (SIC) for two operation conditions are presented: maximum power output and maximum thermal efficiency. Results showed that R1234ze(Z) achieves the highest net power output (up to 44 kW) when net power output is optimized. Regenerative ORC achieves the highest performance when thermal efficiency is optimized (up to 18%). Simple ORC is the most cost-effective among the studied cycle configurations, requiring a selling price of energy of 0.3 USD/kWh to obtain a payback period of 8 years. According to SIC results, the working fluid R1234ze(Z) exhibits great potential for simple ORC when compared to conventional R245fa.

ACS Style

Armando Fontalvo; Jose Solano; Cristian Pedraza; Antonio Bula; Arturo Gonzalez Quiroga; Ricardo Vasquez Padilla. Energy, Exergy and Economic Evaluation Comparison of Small-Scale Single and Dual Pressure Organic Rankine Cycles Integrated with Low-Grade Heat Sources. Entropy 2017, 19, 476 .

AMA Style

Armando Fontalvo, Jose Solano, Cristian Pedraza, Antonio Bula, Arturo Gonzalez Quiroga, Ricardo Vasquez Padilla. Energy, Exergy and Economic Evaluation Comparison of Small-Scale Single and Dual Pressure Organic Rankine Cycles Integrated with Low-Grade Heat Sources. Entropy. 2017; 19 (10):476.

Chicago/Turabian Style

Armando Fontalvo; Jose Solano; Cristian Pedraza; Antonio Bula; Arturo Gonzalez Quiroga; Ricardo Vasquez Padilla. 2017. "Energy, Exergy and Economic Evaluation Comparison of Small-Scale Single and Dual Pressure Organic Rankine Cycles Integrated with Low-Grade Heat Sources." Entropy 19, no. 10: 476.

Review article
Published: 06 March 2017 in Biomass Conversion and Biorefinery
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Biomass conversion to chemicals and fuels through fast pyrolysis shows great potential but requires a more fundamental approach for its deployment. To this end, molecular-based kinetic modeling is starting to play a central role in the prediction of the molecular composition of bio-oil. A molecular-level representation of biomass provides the start point for the generation of detailed pyrolysis reaction networks for both the condensed and the gas phases. Significant progress has been made for cellulose, glucose-based carbohydrates, and lignin, together with the incorporation of the catalytic effects of minerals. Ab initio techniques are widely used to discriminate between reaction mechanisms and to calculate kinetic parameters. Automatic kinetic model generation is expected to play an even more important role in fast pyrolysis as it does already today. Experimental techniques enabled to obtain intrinsic kinetics and to decouple the timescales between reaction kinetics and analytic techniques. This greatly benefits the improvement of detailed kinetic models. The prospects for achieving a first-principles based kinetic model of biomass fast pyrolysis are promising. However, significant work is still needed to couple condensed- and gas-phase reaction networks.

ACS Style

Arturo González Quiroga; Kevin M. Van Geem; Guy B. Marin. Towards first-principles based kinetic modeling of biomass fast pyrolysis. Biomass Conversion and Biorefinery 2017, 7, 305 -317.

AMA Style

Arturo González Quiroga, Kevin M. Van Geem, Guy B. Marin. Towards first-principles based kinetic modeling of biomass fast pyrolysis. Biomass Conversion and Biorefinery. 2017; 7 (3):305-317.

Chicago/Turabian Style

Arturo González Quiroga; Kevin M. Van Geem; Guy B. Marin. 2017. "Towards first-principles based kinetic modeling of biomass fast pyrolysis." Biomass Conversion and Biorefinery 7, no. 3: 305-317.

Research article
Published: 15 September 2016 in Energy & Fuels
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Solid waste is considered as one of the key feedstocks for the chemical industry to stimulate the world’s transition toward a circular economy. Therefore, a novel production process, catalytic pressureless depolymerization (CPD), for conversion of waste to high-energy density liquid fuel has been studied. More specifically, the organic fractions recovered from demolition waste and municipal solid waste were liquefied and deoxygenated in a CPD pilot plant with 150 L h–1 (4.2 × 10–5 m3 s–1) liquid fuel capacity. The produced fuels were characterized by elemental analysis, comprehensive two-dimensional gas chromatography (GC × GC), and the ISO tests for automotive diesel established by the EN 590:2009 Standard. The studied fuels showed very low oxygen contents (40 wt %). The carbon range of the fuel obtained from demolition wood was wider than that of the fuel obtained from municipal solid waste (C5–C29 vs. C6–C22). The flash points (54, 46 °C), the sulfur contents (40, 80 ppmw), and the cetane numbers (43, 33) did not comply with the respective requirements for automotive diesel (i.e., ≥55 °C, <10 ppmw, and ≥51). Nevertheless, both fuels showed salient cold filter plugging points (−14, −15 °C) and cloud points (−15, −44 °C), which are indicative of good fuel performance at extreme winter conditions. The wide carbon number distribution, especially toward the lower range (i.e., carbon number < C12), suggests that the studied fuels can be split into a kerosene-like and a diesel-like cut. Overall, the fuels from the CPD process exhibit great potential as alternative transportation fuel; however, selecting the starting material is crucial for minimizing costly hydrotreating.

ACS Style

Arturo Gonzalez-Quiroga; Marko R. Djokic; Kevin M. Van Geem; Guy B. Marin. Conversion of Solid Waste to Diesel via Catalytic Pressureless Depolymerization: Pilot Scale Production and Detailed Compositional Characterization. Energy & Fuels 2016, 30, 8292 -8303.

AMA Style

Arturo Gonzalez-Quiroga, Marko R. Djokic, Kevin M. Van Geem, Guy B. Marin. Conversion of Solid Waste to Diesel via Catalytic Pressureless Depolymerization: Pilot Scale Production and Detailed Compositional Characterization. Energy & Fuels. 2016; 30 (10):8292-8303.

Chicago/Turabian Style

Arturo Gonzalez-Quiroga; Marko R. Djokic; Kevin M. Van Geem; Guy B. Marin. 2016. "Conversion of Solid Waste to Diesel via Catalytic Pressureless Depolymerization: Pilot Scale Production and Detailed Compositional Characterization." Energy & Fuels 30, no. 10: 8292-8303.

Research article
Published: 29 July 2016 in ACS Sustainable Chemistry & Engineering
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Fast pyrolysis bio-oils are feasible energy carriers and a potential source of chemicals. Detailed characterization of bio-oils is essential to further develop its potential use. In this study, quantitative 13C nuclear magnetic resonance (13C NMR) combined with comprehensive two-dimensional gas chromatography (GC × GC) was used to characterize fast pyrolysis bio-oils originated from pinewood, wheat straw, and rapeseed cake. The combination of both techniques provided new information on the chemical composition of bio-oils for further upgrading. 13C NMR analysis indicated that pinewood-based bio-oil contained mostly methoxy/hydroxyl (≈30%) and carbohydrate (≈27%) carbons; wheat straw bio-oil showed to have high amount of alkyl (≈35%) and aromatic (≈30%) carbons, while rapeseed cake-based bio-oil had great portions of alkyl carbons (≈82%). More than 200 compounds were identified and quantified using GC × GC coupled to a flame ionization detector (FID) and a time of flight mass spectrometer (TOF-MS). Nonaromatics were the most abundant and comprised about 50% of the total mass of compounds identified and quantified via GC × GC. In addition, this analytical approach allowed the quantification of high value-added phenolic compounds, as well as of low molecular weight carboxylic acids and aldehydes, which exacerbate the unstable and corrosive character of the bio-oil.

ACS Style

Leila Negahdar; Arturo González Quiroga; Daria Otyuskaya; Hilal E. Toraman; Li Liu; Johann T. B. H. Jastrzebski; Kevin. M. Van Geem; Guy B. Marin; Joris W. Thybaut; Bert M. Weckhuysen. Characterization and Comparison of Fast Pyrolysis Bio-oils from Pinewood, Rapeseed Cake, and Wheat Straw Using 13C NMR and Comprehensive GC × GC. ACS Sustainable Chemistry & Engineering 2016, 4, 4974 -4985.

AMA Style

Leila Negahdar, Arturo González Quiroga, Daria Otyuskaya, Hilal E. Toraman, Li Liu, Johann T. B. H. Jastrzebski, Kevin. M. Van Geem, Guy B. Marin, Joris W. Thybaut, Bert M. Weckhuysen. Characterization and Comparison of Fast Pyrolysis Bio-oils from Pinewood, Rapeseed Cake, and Wheat Straw Using 13C NMR and Comprehensive GC × GC. ACS Sustainable Chemistry & Engineering. 2016; 4 (9):4974-4985.

Chicago/Turabian Style

Leila Negahdar; Arturo González Quiroga; Daria Otyuskaya; Hilal E. Toraman; Li Liu; Johann T. B. H. Jastrzebski; Kevin. M. Van Geem; Guy B. Marin; Joris W. Thybaut; Bert M. Weckhuysen. 2016. "Characterization and Comparison of Fast Pyrolysis Bio-oils from Pinewood, Rapeseed Cake, and Wheat Straw Using 13C NMR and Comprehensive GC × GC." ACS Sustainable Chemistry & Engineering 4, no. 9: 4974-4985.

Bioprocess engineering
Published: 01 December 2015 in Brazilian Journal of Chemical Engineering
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An attractive operation strategy for the enzymatic hydrolysis of lignocellulosics results from dividing the process into three stages with complementary goals: continuous enzyme adsorption at low-solids loading (5% w/w) with recycling of the liquid phase; continuous liquefaction at high-solids content (up to 20% w/w); and, finally, continuous or semicontinuous hydrolysis with supplementation of fresh enzymes. This paper presents a detailed modeling and simulation framework for the aforementioned operation strategies. The limiting micromixing situations of macrofluid and microfluid are used to predict conversions. The adsorption and liquefaction stages are modeled as a continuous stirred tank and a plug flow reactor, respectively. Two alternatives for the third stage are studied: a train of five cascading stirred tanks and a battery of batch reactors in parallel. Simulation results show that glucose concentrations greater than 100 g L-1 could be reached with both of the alternatives for the third stage.

ACS Style

Arturo González Quiroga; A. Bula Silvera; R. Vasquez Padilla; A. C. Da Costa; R. Maciel Filho. CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS. Brazilian Journal of Chemical Engineering 2015, 32, 805 -819.

AMA Style

Arturo González Quiroga, A. Bula Silvera, R. Vasquez Padilla, A. C. Da Costa, R. Maciel Filho. CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS. Brazilian Journal of Chemical Engineering. 2015; 32 (4):805-819.

Chicago/Turabian Style

Arturo González Quiroga; A. Bula Silvera; R. Vasquez Padilla; A. C. Da Costa; R. Maciel Filho. 2015. "CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS." Brazilian Journal of Chemical Engineering 32, no. 4: 805-819.

Journal article
Published: 01 July 2014 in Energy
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Control strategies for auto-ignition control in turbocharged internal combustion engines operating with gaseous fuels are presented. Ambient temperature and ambient pressure are considered as the disturbing variables. A thermodynamic model for predicting temperature at the ignition point is developed, adjusted and validated with a large experimental data-set from high power turbocharged engines. Based on this model, the performance of feedback and feedforward auto-ignition control strategies is explored. A robustness and fragility analysis for the Feedback control strategies is presented. The feedforward control strategy showed the best performance however its implementation entails adding a sensor and new control logic. The proposed control strategies and the proposed thermodynamic model are useful tools for increasing the range of application of gaseous fuels with low methane number while ensuring a safe running in internal combustion engines

ACS Style

Jorge Duarte; German Amador; Jesus Garcia; Armando Fontalvo; Ricardo Vasquez Padilla; Marco Sanjuan; Arturo González Quiroga. Auto-ignition control in turbocharged internal combustion engines operating with gaseous fuels. Energy 2014, 71, 137 -147.

AMA Style

Jorge Duarte, German Amador, Jesus Garcia, Armando Fontalvo, Ricardo Vasquez Padilla, Marco Sanjuan, Arturo González Quiroga. Auto-ignition control in turbocharged internal combustion engines operating with gaseous fuels. Energy. 2014; 71 ():137-147.

Chicago/Turabian Style

Jorge Duarte; German Amador; Jesus Garcia; Armando Fontalvo; Ricardo Vasquez Padilla; Marco Sanjuan; Arturo González Quiroga. 2014. "Auto-ignition control in turbocharged internal combustion engines operating with gaseous fuels." Energy 71, no. : 137-147.