This page has only limited features, please log in for full access.
Incorporation of biochar in cementitious materials is a promising solution in the mitigation of environmental pollutants by partially cutting off the consumed ordinary Portland cement and reducing the amount of waste disposal in landfills. This work studied the partial replacement of cement by biochars having a different chemical composition and its effect on the performance of cement mortars. The feedstocks for biochar production were selected from biomass wastes produced in agro-industrial and forestry sectors in Portugal. They included olive stone, rice husk and wood chips from residual forest biomass. Biochars were produced at 500 ℃ using a slow pyrolysis process. The biochars were added at different cement replacement rates; 0.5, 1, 2 and 4 wt% of cement weight. XRD and TGA were used to elaborate the effect of biochar on the hydration products. Effect of biochar addition on the capillary water absorption, compressive and flexural strength of cement mortar was analyzed. The results suggested that the biochars contributed to the promotion of hydration products. Cement replacement with 4 wt% olive stone and rice husk biochars was associated with a slight increase of 28-days compressive strength. Rice husk biochar showed the best long-term mechanical performance due to its pozzolanic reaction in the matrix. No significant changes were observed in the water absorption of cement mortar after the addition of 4 wt% biochar as cement replacement. The research outcomes suggested the beneficial effect of cement replacement with biochars from olive stone and rice husk up to 4 wt% with comparable properties.
Hamid Maljaee; Helena Paiva; Rozita Madadi; Luís A.C. Tarelho; Miguel Morais; Victor M. Ferreira. Effect of cement partial substitution by waste-based biochar in mortars properties. Construction and Building Materials 2021, 301, 124074 .
AMA StyleHamid Maljaee, Helena Paiva, Rozita Madadi, Luís A.C. Tarelho, Miguel Morais, Victor M. Ferreira. Effect of cement partial substitution by waste-based biochar in mortars properties. Construction and Building Materials. 2021; 301 ():124074.
Chicago/Turabian StyleHamid Maljaee; Helena Paiva; Rozita Madadi; Luís A.C. Tarelho; Miguel Morais; Victor M. Ferreira. 2021. "Effect of cement partial substitution by waste-based biochar in mortars properties." Construction and Building Materials 301, no. : 124074.
This work presents a technical analysis of an Integrated Biomass Direct Gasification/Gas Turbine (BIG-GT) technology within a sugarcane industry to produce electricity and thermal energy (process heat) using bagasse as fuel. Four possible configurations for the implementation of this technology were considered. A sensitivity analysis was made to assess the risks and the uncertainty level for each proposed solution. The results indicated that with the BIG-GT implementation the power generation efficiency increases for all the studied configurations as compared to the conventional system (η = 14.3%). For the configurations I, II, and III the efficiency increase was 9.1%, 11.0% and 12.6%, respectively. However, to support these configurations of the system, the fuel (bagasse) consumption is increased beyond the production capacity of the mill, and the additional amount of bagasse must be acquired to other mills. On the other hand, in configuration IV it is only considered the gasification of the bagasse produced in the mill, being the additional needs of thermal energy for the industrial process supplemented through the combustion of other biomass types (sugarcane straw produced in the mill plantations) in a Heat Recovery Steam Generator. In configuration IV, the electricity generation efficiency is only 5.9% higher than the conventional cycle, this efficiency is getting without the need for an external supply of bagasse. Ultimately, the sensitivity analysis showed that the plant's energy performance with the implementation of BIG-GT technology is particularly sensitive to variations related to the gasifier's efficiency.
José Ramón Copa Rey; Jorge Jadid Tamayo Pacheco; Luís António Da Cruz Tarelho; Valter Silva; João Sousa Cardoso; José Luz Silveira; Celso Eduardo Tuna. Evaluation of cogeneration alternative systems integrating biomass gasification applied to a Brazilian sugar industry. Renewable Energy 2021, 178, 318 -333.
AMA StyleJosé Ramón Copa Rey, Jorge Jadid Tamayo Pacheco, Luís António Da Cruz Tarelho, Valter Silva, João Sousa Cardoso, José Luz Silveira, Celso Eduardo Tuna. Evaluation of cogeneration alternative systems integrating biomass gasification applied to a Brazilian sugar industry. Renewable Energy. 2021; 178 ():318-333.
Chicago/Turabian StyleJosé Ramón Copa Rey; Jorge Jadid Tamayo Pacheco; Luís António Da Cruz Tarelho; Valter Silva; João Sousa Cardoso; José Luz Silveira; Celso Eduardo Tuna. 2021. "Evaluation of cogeneration alternative systems integrating biomass gasification applied to a Brazilian sugar industry." Renewable Energy 178, no. : 318-333.
Improving the livelihoods of communities living in fragile ecosystems, such as tropical forests, is among the main strategies to promote their conservation and preserve wildlife. In the Ecuadorian Amazon, farmers’ cooperatives are recognized as an important mechanism to improve the socioeconomic conditions of local communities. This study analyzes the integration of pyrolysis processes to convert agricultural waste into biochar as a way to implement the bioeconomy in these organizations. We found that post-harvesting processes in the studied farmers’ cooperatives are similar, and coffee husks are a potential feedstock to produce biochar. Although the environmental policies in Ecuador consider the valorization of agricultural waste, we did not find any specific standard to regulate the operation of pyrolysis facilities. Nonetheless, conversion of agricultural waste into biochar can contribute to (i) replacement of subsidized fossil fuels used in drying processes, (ii) prevention of environmental pollution caused by accumulation of waste, (iii) emergence of new income sources linked with the provision of carbon sequestration services, and (iv) the long-term maintenance of soil fertility. Currently, demonstration projects are needed to stimulate collaboration among farmers’ cooperatives, academia, the government, international cooperation agencies, and existing forest conservation initiatives.
Mario Heredia Salgado; Ina Säumel; Andrea Cianferoni; Luís Tarelho. Potential for Farmers’ Cooperatives to Convert Coffee Husks into Biochar and Promote the Bioeconomy in the North Ecuadorian Amazon. Applied Sciences 2021, 11, 4747 .
AMA StyleMario Heredia Salgado, Ina Säumel, Andrea Cianferoni, Luís Tarelho. Potential for Farmers’ Cooperatives to Convert Coffee Husks into Biochar and Promote the Bioeconomy in the North Ecuadorian Amazon. Applied Sciences. 2021; 11 (11):4747.
Chicago/Turabian StyleMario Heredia Salgado; Ina Säumel; Andrea Cianferoni; Luís Tarelho. 2021. "Potential for Farmers’ Cooperatives to Convert Coffee Husks into Biochar and Promote the Bioeconomy in the North Ecuadorian Amazon." Applied Sciences 11, no. 11: 4747.
Charcoal production in Portugal is mostly based on the valorization of woody residues from cork oak and holm oak, the latter being considered a reference feedstock in the market. Nevertheless, since wildfire prevention became a priority in Portugal, after the recent dramatic wildfires, urgent actions are being conducted to reduce the fuel load in the forests, which is increasing the amount of biomass that is available for valorization. Additionally, biomass residues from agriculture, forest management, control of invasive species, partially burnt wood from post-fire recovery actions, and waste wood from storm devastated forests need also to be considered within the national biomass valorization policies. This has motivated the present work on whether the carbonization process can be used to valorize alternative woody biomasses not currently used on a large scale. For this purpose, slow pyrolysis experiments were carried out with ten types of wood, using a fixed bed reactor allowing the controlled heating of large fuel particles at 0.1 to 5 °C/min and final temperatures within 300–450 °C. Apart from an evaluation of the mass balance of the process, emphasis was given to the properties of the resulting charcoals considering its major market in Portugal—barbecue charcoal for both recreational and professional purposes.
Felix Charvet; Felipe Silva; Luís Ruivo; Luís Tarelho; Arlindo Matos; José Figueiredo da Silva; Daniel Neves. Pyrolysis Characteristics of Undervalued Wood Varieties in the Portuguese Charcoal Sector. Energies 2021, 14, 2537 .
AMA StyleFelix Charvet, Felipe Silva, Luís Ruivo, Luís Tarelho, Arlindo Matos, José Figueiredo da Silva, Daniel Neves. Pyrolysis Characteristics of Undervalued Wood Varieties in the Portuguese Charcoal Sector. Energies. 2021; 14 (9):2537.
Chicago/Turabian StyleFelix Charvet; Felipe Silva; Luís Ruivo; Luís Tarelho; Arlindo Matos; José Figueiredo da Silva; Daniel Neves. 2021. "Pyrolysis Characteristics of Undervalued Wood Varieties in the Portuguese Charcoal Sector." Energies 14, no. 9: 2537.
Rendering mortars were prepared by replacing conventional sands, namely coarse sand (CS) and fine sand (FS), by different dosages of biomass dry bottom ash (BA) and fly ash (FA). Bottom ash was treated by sieving and washing and called treated bottom ash (TBA). All these ashes were characterized, and their effects on the physical and mechanical characteristics of mortars were studied. The dosage of water required to maintain workability of samples formulated with TBA, BA, and FA was not significantly different from the volume used to formulate a reference mortar, since the physical characteristics of the ashes used were similar to those of CS and FS. Workability, weight variation, unrestrained shrinkage and compressive strength were measured. The results showed that the pre-processing of BA and FA has to be properly characterized in the effort to reuse these materials as effective replacements of natural sand in mortars, and the associated environmental aspects should be further investigated to support this recycling strategy.
Regina Célia Espinosa Modolo; Guilherme Ascensão; Luciano Senff; Francisco Roger Carneiro Ribeiro; Luis António Da Cruz Tarelho; Victor Miguel Ferreira; João António Labrincha; António Santos Silva; Carlos Alberto Mendes Moraes. RECYCLING OF ASHES FROM BIOMASS COMBUSTION AS RAW MATERIAL FOR MORTARS. MIX Sustentável 2021, 7, 137 -146.
AMA StyleRegina Célia Espinosa Modolo, Guilherme Ascensão, Luciano Senff, Francisco Roger Carneiro Ribeiro, Luis António Da Cruz Tarelho, Victor Miguel Ferreira, João António Labrincha, António Santos Silva, Carlos Alberto Mendes Moraes. RECYCLING OF ASHES FROM BIOMASS COMBUSTION AS RAW MATERIAL FOR MORTARS. MIX Sustentável. 2021; 7 (2):137-146.
Chicago/Turabian StyleRegina Célia Espinosa Modolo; Guilherme Ascensão; Luciano Senff; Francisco Roger Carneiro Ribeiro; Luis António Da Cruz Tarelho; Victor Miguel Ferreira; João António Labrincha; António Santos Silva; Carlos Alberto Mendes Moraes. 2021. "RECYCLING OF ASHES FROM BIOMASS COMBUSTION AS RAW MATERIAL FOR MORTARS." MIX Sustentável 7, no. 2: 137-146.
I International Virtual Journeys on Adaptation of Agroalimentary, Forestal and Enological Projects to the Principles of the Sustainable Development Goals (SDGs). 19, Universidad de Valladolid (UVA), Palencia, España. Complete book in DOI: 10.6084/m9.figshare.14377358 OBJECTIVES 1) dentify, in the recent literature on CPH biorefinery (last 5 years): •conceptual interrelations,•main research countries,•main areas,•bibliographic connections and publication chronology. 2) Examine technological routes of extraction of bioproducts and subsequent pyrolysis of CPH y others residues. 3) Describe and discuss experiments with controlled pyrolysis reactors and their applications in different agricultural residues. ABOUT I Jornadas Virtuales Internacionales: The 1st international virtual conference on "Adaptation of Agrifood, Forestry and Oenological Projects to the principles of the SDG" is scheduled to take place during the Forestry Week March 16-23 at the Palencia Campus. The main objective is to show undergraduate, master and doctoral students the results and progress of research work and projects and theses developed by research groups of the CSIC, the University of Zaragoza, the University of Bahia (Brazil) and the University of Valladolid. The sessions are free and open to all interested public, with the entire university community (teachers and students) and scientists linked to the agroforestry sector being invited, especially undergraduate, Master and Doctorate students from the ETSIIAA of the University of Valladolid.
Rilton Gonçalo Bonfim Primo; Genyr Kappler; Carlos Alberto Mendes Moraes; Luís António Da Cruz Tarelho; Jesús Martín-Gil; Fernando Cardoso Pedrão; Carlos Narciso Bouza; Ricardo De Araújo Kalid. Technological routes for production of new bio-products from the Cocoa Pod Husk – CPH (Theobroma cacao) and other agricultural wasted materials. 2021, 1 .
AMA StyleRilton Gonçalo Bonfim Primo, Genyr Kappler, Carlos Alberto Mendes Moraes, Luís António Da Cruz Tarelho, Jesús Martín-Gil, Fernando Cardoso Pedrão, Carlos Narciso Bouza, Ricardo De Araújo Kalid. Technological routes for production of new bio-products from the Cocoa Pod Husk – CPH (Theobroma cacao) and other agricultural wasted materials. . 2021; ():1.
Chicago/Turabian StyleRilton Gonçalo Bonfim Primo; Genyr Kappler; Carlos Alberto Mendes Moraes; Luís António Da Cruz Tarelho; Jesús Martín-Gil; Fernando Cardoso Pedrão; Carlos Narciso Bouza; Ricardo De Araújo Kalid. 2021. "Technological routes for production of new bio-products from the Cocoa Pod Husk – CPH (Theobroma cacao) and other agricultural wasted materials." , no. : 1.
I International Virtual Journeys on Adaptation of Agroalimentary, Forestal and Enological Projects to the Principles of the Sustainable Development Goals (SDGs). 19, Universidad de Valladolid (UVA), Palencia, España. Complete book in DOI: 10.6084/m9.figshare.14377358 OBJECTIVES 1) dentify, in the recent literature on CPH biorefinery (last 5 years): •conceptual interrelations,•main research countries,•main areas,•bibliographic connections and publication chronology. 2) Examine technological routes of extraction of bioproducts and subsequent pyrolysis of CPH y others residues. 3) Describe and discuss experiments with controlled pyrolysis reactors and their applications in different agricultural residues. ABOUT I Jornadas Virtuales Internacionales: The 1st international virtual conference on "Adaptation of Agrifood, Forestry and Oenological Projects to the principles of the SDG" is scheduled to take place during the Forestry Week March 16-23 at the Palencia Campus. The main objective is to show undergraduate, master and doctoral students the results and progress of research work and projects and theses developed by research groups of the CSIC, the University of Zaragoza, the University of Bahia (Brazil) and the University of Valladolid. The sessions are free and open to all interested public, with the entire university community (teachers and students) and scientists linked to the agroforestry sector being invited, especially undergraduate, Master and Doctorate students from the ETSIIAA of the University of Valladolid.
Rilton Gonçalo Bonfim Primo; Genyr Kappler; Carlos Alberto Mendes Moraes; Luís António Da Cruz Tarelho; Jesús Martín-Gil; Fernando Cardoso Pedrão; Carlos Narciso Bouza; Ricardo De Araújo Kalid. Technological routes for production of new bio-products from the Cocoa Pod Husk – CPH (Theobroma cacao) and other agricultural wasted materials. 2021, 1 .
AMA StyleRilton Gonçalo Bonfim Primo, Genyr Kappler, Carlos Alberto Mendes Moraes, Luís António Da Cruz Tarelho, Jesús Martín-Gil, Fernando Cardoso Pedrão, Carlos Narciso Bouza, Ricardo De Araújo Kalid. Technological routes for production of new bio-products from the Cocoa Pod Husk – CPH (Theobroma cacao) and other agricultural wasted materials. . 2021; ():1.
Chicago/Turabian StyleRilton Gonçalo Bonfim Primo; Genyr Kappler; Carlos Alberto Mendes Moraes; Luís António Da Cruz Tarelho; Jesús Martín-Gil; Fernando Cardoso Pedrão; Carlos Narciso Bouza; Ricardo De Araújo Kalid. 2021. "Technological routes for production of new bio-products from the Cocoa Pod Husk – CPH (Theobroma cacao) and other agricultural wasted materials." , no. : 1.
Increasing cement production in construction sector and waste generation in industrial sectors are of the major sources of CO2 emission. For decades, it has been the concern of environmentalists to convince constructors and researchers to find sustainable solutions targeting aforementioned problems. The attempts focused on identification of wastes to be successfully complied with construction materials. Biochar has recently received attention due to several environmental and technological advantages, shortly include carbon sequestration, low thermal conductivity, chemical stability and low flammability. For this reason, biochar is recognized as an efficient candidate for cement or lightweight aggregates replacement in building materials. Biochar addition could result in a reduction of capillary absorption in mortar paste. Besides, its addition accelerates cement hydration and restricts shrinkage cracking in cement mortar. The present review categorizes all the biochar critical features affecting the performance of cementitious materials. The effect of biochar addition as filler and cement replacement on the workability, hydration, mechanical and transfer properties of cement paste/composites is reviewed in this paper. From the data collection, an optimum biochar content around 2% is shown to contribute to the improvement of mechanical properties. The gaps in the literature are identified and the future research plans are proposed.
Hamid Maljaee; Rozita Madadi; Helena Paiva; Luis Tarelho; Victor M. Ferreira. Incorporation of biochar in cementitious materials: A roadmap of biochar selection. Construction and Building Materials 2021, 283, 122757 .
AMA StyleHamid Maljaee, Rozita Madadi, Helena Paiva, Luis Tarelho, Victor M. Ferreira. Incorporation of biochar in cementitious materials: A roadmap of biochar selection. Construction and Building Materials. 2021; 283 ():122757.
Chicago/Turabian StyleHamid Maljaee; Rozita Madadi; Helena Paiva; Luis Tarelho; Victor M. Ferreira. 2021. "Incorporation of biochar in cementitious materials: A roadmap of biochar selection." Construction and Building Materials 283, no. : 122757.
The pulp and paper industry has been researching different treatments for the degradation of adsorbable organohalogens (AOX). In this work, two agitation processes (mechanical and ultrasound) were analyzed in the AOX degradation of the bleaching wastewater using nano zero valent iron (nZVI). The work used different variables for the AOX removal process, such as pH, time, nZVI, and hydrogen peroxide (H2O2) concentration. Results show an increase in AOX degradation when a higher nZVI concentration is used. The optimal combination of variables for the treatment with mechanical agitation was found in the ratio 2:5 (nZVI : H2O2), degrading 85% of AOX in 60 min, with acid pH. Ultrasound treatment consisted of half process time and less degradation than mechanical agitation treatment. The 2:5 ratio in ultrasound agitation degraded 55% of AOX within 30 min at the end of the process. Both methods of the homogenization process of zero valent iron nanoparticles in the bleaching wastewater of the paper and cellulose industry are efficient. However, the mechanical stirring process has a more significant potential for AOX degradation. The variables (pH, concentration of nZVI and H2O2 and duration of the process) used in the bleaching wastewater treatment process must be considered for future implementation in the pulp and paper industry.
Camila Stockey Erhardt; Tania Maria Basegio; Isabel Capela; Adriane Lawisch Rodríguez; Ênio Leandro Machado; Diosnel Antonio Rodríguez López; Luís Tarelho; Carlos Pérez Bergmann. AOX degradation of the pulp and paper industry bleaching wastewater using nZVI in two different agitation processes. Environmental Technology & Innovation 2021, 22, 101420 .
AMA StyleCamila Stockey Erhardt, Tania Maria Basegio, Isabel Capela, Adriane Lawisch Rodríguez, Ênio Leandro Machado, Diosnel Antonio Rodríguez López, Luís Tarelho, Carlos Pérez Bergmann. AOX degradation of the pulp and paper industry bleaching wastewater using nZVI in two different agitation processes. Environmental Technology & Innovation. 2021; 22 ():101420.
Chicago/Turabian StyleCamila Stockey Erhardt; Tania Maria Basegio; Isabel Capela; Adriane Lawisch Rodríguez; Ênio Leandro Machado; Diosnel Antonio Rodríguez López; Luís Tarelho; Carlos Pérez Bergmann. 2021. "AOX degradation of the pulp and paper industry bleaching wastewater using nZVI in two different agitation processes." Environmental Technology & Innovation 22, no. : 101420.
Energy plays a key role for humanity, so the best way to absorb the huge increase in energy demand is perhaps through energy diversification and decentralization
Felipe Thalles Moreira Silva; José de Jesus Figueiredo da Silva; David Filipe Ramos Silva; Luís António Da Cruz Tarelho; Manuel Arlindo Amador De Matos; Daniel dos Santos Félix das Neves. Charcoal Production Infrastructure in the Portalegre District, Portugal: First Assessment from Satellite Imagery and Field Observations. Proceedings 2021, 52, 1 .
AMA StyleFelipe Thalles Moreira Silva, José de Jesus Figueiredo da Silva, David Filipe Ramos Silva, Luís António Da Cruz Tarelho, Manuel Arlindo Amador De Matos, Daniel dos Santos Félix das Neves. Charcoal Production Infrastructure in the Portalegre District, Portugal: First Assessment from Satellite Imagery and Field Observations. Proceedings. 2021; 52 (1):1.
Chicago/Turabian StyleFelipe Thalles Moreira Silva; José de Jesus Figueiredo da Silva; David Filipe Ramos Silva; Luís António Da Cruz Tarelho; Manuel Arlindo Amador De Matos; Daniel dos Santos Félix das Neves. 2021. "Charcoal Production Infrastructure in the Portalegre District, Portugal: First Assessment from Satellite Imagery and Field Observations." Proceedings 52, no. 1: 1.
The gasification process involves several reactions that occur simultaneously and are interrelated by several independent variables. Simulation tools can help us to understand the process behaviour and predict the efficiency and final composition of the products. In this work, two thermodynamic equilibrium models developed in Aspen Plus® software were assessed: a non-stoichiometric model based on the feedstock composition and on the most probable compounds expected from the results of the gasification process using minimisation of Gibbs free energy and a stoichiometric model based on a set of chemical reactions considered as the most relevant to describe the gasification process. Both models were validated with experimental data from a bubbling fluidised bed semi-pilot scale gasifier using pine kernel shells (PKS) as feedstock. The influence of temperature, stoichiometric ratio (SR) and steam to biomass ratio (SBR) were analysed. Overall, predictions of the gas composition and gasification efficiency parameters by the stoichiometric model showed better agreement to the experimental results. Our results point out the significance of an accurate description of the equilibrium composition of producer gas with the stoichiometric model for the gasification of biomass.
María Pilar González-Vázquez; Fernando Rubiera; Covadonga Pevida; Daniel T. Pio; Luís A.C. Tarelho. Thermodynamic Analysis of Biomass Gasification Using Aspen Plus: Comparison of Stoichiometric and Non-Stoichiometric Models. Energies 2021, 14, 189 .
AMA StyleMaría Pilar González-Vázquez, Fernando Rubiera, Covadonga Pevida, Daniel T. Pio, Luís A.C. Tarelho. Thermodynamic Analysis of Biomass Gasification Using Aspen Plus: Comparison of Stoichiometric and Non-Stoichiometric Models. Energies. 2021; 14 (1):189.
Chicago/Turabian StyleMaría Pilar González-Vázquez; Fernando Rubiera; Covadonga Pevida; Daniel T. Pio; Luís A.C. Tarelho. 2021. "Thermodynamic Analysis of Biomass Gasification Using Aspen Plus: Comparison of Stoichiometric and Non-Stoichiometric Models." Energies 14, no. 1: 189.
Pollutants resulting from domestic combustion would have harmful effects on public health, causing disturbances in the atmosphere chemistry and the climate. In this work, the emissions from the combustion of pellets made of 80% poplar (organically fertilized) and 20% cereal straw (Triticum aestivum) have been analysed. Poplar wood from I-214 and AF-8 clones was obtained from fertilized and non-fertilized plots (CONTROL). Dairy wastewater treatment (MUD) and dehydrated sewage sludge (BIOSOLIDS) were the fertilizers employed. BIOSOLIDS-I214 pellets had lower quality standards, so its combustion was omitted. A flue gas sample was sampled together with the particles emitted. The I-214 MUD sample had the highest emitted CO value (1505 mg/MJ). Regarding HCl emission factors, there was a homogeneity in the results linked with the Cl content present in the raw material. A higher particle emission was associated with pellets with higher ash content. Particles were composed mainly for elemental carbon (26–80 mg/MJ), except I-214 MUD. I-214 pellets had the indicators of incomplete combustion and, therefore, major contaminants emission and major environmental impact. Thus, both the poplar clone and the organic fertilizer influenced the parameters and emissions analysed. Therefore, special attention must be paid to both characteristics.
Sergio Paniagua; Alba Prado-Guerra; Ana Isabel Neto; Teresa Nunes; Luís Tarelho; Célia Alves; Luis Fernando Calvo. Influence of Varieties and Organic Fertilizer in the Elaboration of a New Poplar-Straw Pellet and Its Emissions in a Domestic Boiler. Energies 2020, 13, 6332 .
AMA StyleSergio Paniagua, Alba Prado-Guerra, Ana Isabel Neto, Teresa Nunes, Luís Tarelho, Célia Alves, Luis Fernando Calvo. Influence of Varieties and Organic Fertilizer in the Elaboration of a New Poplar-Straw Pellet and Its Emissions in a Domestic Boiler. Energies. 2020; 13 (23):6332.
Chicago/Turabian StyleSergio Paniagua; Alba Prado-Guerra; Ana Isabel Neto; Teresa Nunes; Luís Tarelho; Célia Alves; Luis Fernando Calvo. 2020. "Influence of Varieties and Organic Fertilizer in the Elaboration of a New Poplar-Straw Pellet and Its Emissions in a Domestic Boiler." Energies 13, no. 23: 6332.
One of the problems associated with biomass combustion is the amount of fly ashes generated and its subsequent management. The search for ways of valorizing these ashes has been a challenge for the academic and industrial community. On the other hand, used cooking oils are wastes which management is quite difficult, by they have a very important energetic potential. The goal of this work was to optimize the Fatty Acid Methyl Esters (FAME) process, recovering two residual materials (waste cooking oils (WCO), and biomass fly flash (BFA)). The optimization of the process was achieved using the response surface methodology and a Box-Benhken experimental design applied to mixtures of WCO and refined palm oil (RPO), using BFA as catalyst. The influence on FAME yield of four variables (catalyst loading, methanol/oil molar ratio, RPO/WCO ratio and reaction temperature) was studied. The higher FAME yield achieved was 73.8% for the following operating conditions: 13.57 wt% of catalyst loading, 6.7 of methanol/oil molar ratio, 28.04 wt% of RPO in the oil mixture with WCO and 55 °C for the reaction temperature. The reusability of the BFA catalyst in the process was also studied through three successive usage cycles finding no loss of catalytic activity.
Edgar M. Vargas; Lizeth Ospina; Márcia C. Neves; Luís A.C. Tarelho; Maria I. Nunes. Optimization of FAME production from blends of waste cooking oil and refined palm oil using biomass fly ash as a catalyst. Renewable Energy 2020, 163, 1637 -1647.
AMA StyleEdgar M. Vargas, Lizeth Ospina, Márcia C. Neves, Luís A.C. Tarelho, Maria I. Nunes. Optimization of FAME production from blends of waste cooking oil and refined palm oil using biomass fly ash as a catalyst. Renewable Energy. 2020; 163 ():1637-1647.
Chicago/Turabian StyleEdgar M. Vargas; Lizeth Ospina; Márcia C. Neves; Luís A.C. Tarelho; Maria I. Nunes. 2020. "Optimization of FAME production from blends of waste cooking oil and refined palm oil using biomass fly ash as a catalyst." Renewable Energy 163, no. : 1637-1647.
The present work assesses the energetic valorisation of forest biomass blends in the archipelago of the Azores, to do so, a multiphase 2-D Eulerian-Eulerian model was employed to simulate forest biomass gasification in a pilot-scale fluidized bed reactor. The numerical model was validated under experimental gasification runs performed in a 250 kWth quasi-industrial biomass gasifier. The potential use of the produced syngas as a complementary energy source for small-scale power production in the Azores was assessed based on the results. The exergy efficiency and tar production of the process were determined. A techno-economic study combining the net present value (NPV), internal rate of return (IRR), and payback period (PBP) followed by a Monte Carlo sensitivity analysis was comparatively performed for two distinct application sizes (100 and 1000 kW) so to gauge which unit size carries enhanced operative feasibility and foresee the main investment risks in conducting forest biomass blends gasification for power production in small facilities. Results revealed that the 100 kW unit was economically impracticable under current market conditions, while the 1000 kW unit showed to be economically feasible with an NPV of 486 k€, IRR of 17.44% and PBP of 7.4 years. The sensitivity analysis predicted a higher risk of failure in the NPV, being highly sensitive to the electricity sales tariff and electricity production. Indeed, forest biomass gasification projects carry great potential when applied to small facilities with economic viability in some economies of scales, withal, special concerns must always be considered regarding the project attractiveness to potential investors.
João Cardoso; Valter Silva; Daniela Eusébio; Inês Lima Azevedo; Luís A.C. Tarelho. Techno-economic analysis of forest biomass blends gasification for small-scale power production facilities in the Azores. Fuel 2020, 279, 118552 .
AMA StyleJoão Cardoso, Valter Silva, Daniela Eusébio, Inês Lima Azevedo, Luís A.C. Tarelho. Techno-economic analysis of forest biomass blends gasification for small-scale power production facilities in the Azores. Fuel. 2020; 279 ():118552.
Chicago/Turabian StyleJoão Cardoso; Valter Silva; Daniela Eusébio; Inês Lima Azevedo; Luís A.C. Tarelho. 2020. "Techno-economic analysis of forest biomass blends gasification for small-scale power production facilities in the Azores." Fuel 279, no. : 118552.
In developing countries, the technology used for biomass carbonization requires major retrofits for an efficient conversion of the residual biomass produced in the palm oil mills into biochar. This study analyzes a prototype of a small and modular auger reactor (P-SMART) that uses untreated kernel shells as feedstock to produce biochar and thermal energy. The P-SMART does not require inert gases during operation, neither diesel nor natural gas for the initial heating process. This study shows that the carbonization process can be driven by the energy generated during pyrolysis gas combustion (auto-thermal conditions) from a biomass load capacity of 30 kg/h. During the auto-thermal operation, the thermal energy generated by pyrolysis gas combustion is higher than that required by the carbonization process. The carbon monoxide concentration in the flue gas during the auto-thermal operation was 197 mg/Nm3 which is lower than the European eco-design requirement of 500 mg/Nm3 (both measured at 11% vol. O2, dry gas). The biochars produced during auto-thermal operation have a macro-porous structure with a pore radius that ranges from 0.42 to 12.48 μm. The carbon content and the molar H/Corg and O/Corg ratio of the analyzed biochars are in accordance with the European guidelines for the sustainable production of biochar of less than 0.7 and 0.4 respectively. Moreover, relevant soil nutrients were observed in the KS ash, namely: silica (30 wt%), potassium (8.2 wt%) and phosphorous (3 wt%).
Mario A. Heredia Salgado; Jonathan A. Coba S; Luís António Da Cruz Tarelho. Simultaneous production of biochar and thermal energy using palm oil residual biomass as feedstock in an auto-thermal prototype reactor. Journal of Cleaner Production 2020, 266, 121804 .
AMA StyleMario A. Heredia Salgado, Jonathan A. Coba S, Luís António Da Cruz Tarelho. Simultaneous production of biochar and thermal energy using palm oil residual biomass as feedstock in an auto-thermal prototype reactor. Journal of Cleaner Production. 2020; 266 ():121804.
Chicago/Turabian StyleMario A. Heredia Salgado; Jonathan A. Coba S; Luís António Da Cruz Tarelho. 2020. "Simultaneous production of biochar and thermal energy using palm oil residual biomass as feedstock in an auto-thermal prototype reactor." Journal of Cleaner Production 266, no. : 121804.
In this work, two approaches to predict the producer gas composition obtained by direct (air) biomass gasification in bubbling fluidized beds were developed and compared, namely empirical modelling based on reported experimental results in the literature and non-stoichiometric chemical equilibrium modelling. For this purpose, an extensive database containing a set of 19 published experimental results from the literature was compiled and a non-stoichiometric chemical equilibrium model developed. The prediction capability of the empirical and chemical equilibrium model was evaluated by comparison with experimental data obtained in an 80 kWth bubbling fluidized bed direct (air) biomass gasifier. The empirical model shows moderate accuracy in the determination of the producer gas composition (CO, H2 and CH4), whereas the chemical equilibrium clearly overestimates the concentration of H2 and CO, and underestimates the concentration of CH4, leading to subpar accuracy in the determination of typical gasification efficiency parameters. Thus, the empirical model is suited for preliminary estimates of gasification products, while black-box chemical equilibrium modelling, without experimental knowledge integration, is considered as unreliable for these gasification conditions.
D.T. Pio; Luís António Da Cruz Tarelho. Empirical and chemical equilibrium modelling for prediction of biomass gasification products in bubbling fluidized beds. Energy 2020, 202, 117654 .
AMA StyleD.T. Pio, Luís António Da Cruz Tarelho. Empirical and chemical equilibrium modelling for prediction of biomass gasification products in bubbling fluidized beds. Energy. 2020; 202 ():117654.
Chicago/Turabian StyleD.T. Pio; Luís António Da Cruz Tarelho. 2020. "Empirical and chemical equilibrium modelling for prediction of biomass gasification products in bubbling fluidized beds." Energy 202, no. : 117654.
This manuscript presents a scientometric analysis on the studies performed on the application of biochar for soil amendment in order to investigate the research and developments in this field and to identify the existing gaps to provide recommendations for future studies. A total of 2982 bibliographic records were retrieved from the Web of Science (WoS) database using appropriate sets of keywords, and these were analyzed based on the criteria of authors, publishing journals, citations received, contributing countries, institution, and categories in research and development. Based on these data, progress of research was mapped to identify the scientific status, such as current scientific and technological trends as well as the knowledge gaps. The majority of scientific developments started in the early 2000′s and accelerated considerably after 2014. China and USA are the leading countries in the application of biochar for the treatment of soils. Among the active journals, “Plant and Soil” has received the highest number of citations. This study attempts for a comprehensive discussion and understanding on scientific advances as well as the progress made, especially in recent years.
Mohammadreza Kamali; Dina JahanianFard; Amid Mostafaie; Mahsa Davarazar; Ana Paula Duarte Gomes; Luís António Da Cruz Tarelho; Raf Dewil; Tejraj M. Aminabhavi. Scientometric analysis and scientific trends on biochar application as soil amendment. Chemical Engineering Journal 2020, 395, 125128 .
AMA StyleMohammadreza Kamali, Dina JahanianFard, Amid Mostafaie, Mahsa Davarazar, Ana Paula Duarte Gomes, Luís António Da Cruz Tarelho, Raf Dewil, Tejraj M. Aminabhavi. Scientometric analysis and scientific trends on biochar application as soil amendment. Chemical Engineering Journal. 2020; 395 ():125128.
Chicago/Turabian StyleMohammadreza Kamali; Dina JahanianFard; Amid Mostafaie; Mahsa Davarazar; Ana Paula Duarte Gomes; Luís António Da Cruz Tarelho; Raf Dewil; Tejraj M. Aminabhavi. 2020. "Scientometric analysis and scientific trends on biochar application as soil amendment." Chemical Engineering Journal 395, no. : 125128.
The objective of this work is the experimental investigation and characterization of the influence of biomass feeding on combustion efficiency of an industrial biomass boiler. The collected experimental data relate the biomass feeding control with the operating conditions and boiler performance parameters. Two different methods to control of the biomass feeding are considered. One consists on the manually controlled biomass feeding through the boiler control system. The other consists on an automatic control, with the screw-feeder controlled by the boiler control system. Boiler control system governs the introduction of the biomass material into the furnace based on the O2 content of the combustion flue gas stream. Results show that the biomass feeding into the furnace significantly affects the combustion process and the pollutant emissions (e.g., CO and NO).
L. Valente; L.A.C. Tarelho; V.A.F. Costa. Emissions mitigation by control of biomass feeding in an industrial biomass boiler. Energy Reports 2020, 6, 483 -489.
AMA StyleL. Valente, L.A.C. Tarelho, V.A.F. Costa. Emissions mitigation by control of biomass feeding in an industrial biomass boiler. Energy Reports. 2020; 6 ():483-489.
Chicago/Turabian StyleL. Valente; L.A.C. Tarelho; V.A.F. Costa. 2020. "Emissions mitigation by control of biomass feeding in an industrial biomass boiler." Energy Reports 6, no. : 483-489.
In this work, direct (air) co-gasification of refused derived fuel with biomass was demonstrated in an 80kWth pilot-scale bubbling fluidized bed reactor. The influence of the process operating parameters, namely average bed temperature between 785 and 829 °C, equivalence ratio between 0.21 and 0.36 and refused derived fuel weight percentage in the fuel mixture (0, 10, 20, 50 and 100 wt%) was analyzed. For the operating conditions used, the process was demonstrated as autothermal and operating under steady-state conditions, with no defluidization phenomena observed. The increase of the refused derived fuel weight percentage in the fuel mixture led to an increase of the methane and ethylene concentration in the producer gas and, consequently, an increase of the producer gas lower heating value, reaching a maximum value of 6.4 MJ/Nm3. In terms of efficiency parameters, cold gas efficiency was found between 32.6 and 53.5% and carbon conversion efficiency between 56.0 and 84.1%. A slight increase of the cold gas efficiency was observed with the increase of the refused derived fuel weight percentage in the fuel mixture. Thus, refused derived fuel co-gasification with biomass was shown as a highly promising process for the valorization of wastes as an energetic resource.
D.T. Pio; L.A.C. Tarelho; A.M.A. Tavares; M.A.A. Matos; V. Silva. Co-gasification of refused derived fuel and biomass in a pilot-scale bubbling fluidized bed reactor. Energy Conversion and Management 2020, 206, 112476 .
AMA StyleD.T. Pio, L.A.C. Tarelho, A.M.A. Tavares, M.A.A. Matos, V. Silva. Co-gasification of refused derived fuel and biomass in a pilot-scale bubbling fluidized bed reactor. Energy Conversion and Management. 2020; 206 ():112476.
Chicago/Turabian StyleD.T. Pio; L.A.C. Tarelho; A.M.A. Tavares; M.A.A. Matos; V. Silva. 2020. "Co-gasification of refused derived fuel and biomass in a pilot-scale bubbling fluidized bed reactor." Energy Conversion and Management 206, no. : 112476.
Municipal solid waste (MSW) management in dense urban areas is a challenge for municipalities, especially in developing countries, which commonly have deficient waste management. For example, the metropolitan region of Goiás State, Brazil, has 19 municipalities that dispose of about 72.5% of total MSW in unlicensed MSW final disposal facilities. Therefore, this study analysed the investment and operating costs, and revenues of a municipal solid waste management facility, projected for 20 years, shared among these 19 municipalities. The economic viability analysis, has shown that, regardless of the management facility type, MSW collection and transport are the most expensive cost components, accounting for about 60% of MSW management operating costs. For an Internal Rate of Return of 0%, anaerobic digestion is 11% more expensive (in total) than using community composting. For 2040 (last year), the monthly MSW management tariffs will vary between 3.5 and 10.8 R$·inhabitant−1·month−1, depending on the municipality. So, as the unit price of biowaste treatments lowers with waste quantities, for the municipalities with large biowaste quantities, anaerobic digestion becomes recommended for its economic attractiveness. This study can serve as a model for other municipalities in Brazil and elsewhere, helping public decision makers to establish a strategy for MSW management.
Diogo Appel Colvero; José Ramalho; Ana Paula Duarte Gomes; Manuel Arlindo Amador de Matos; Luís António Da Cruz Tarelho. Economic analysis of a shared municipal solid waste management facility in a metropolitan region. Waste Management 2019, 102, 823 -837.
AMA StyleDiogo Appel Colvero, José Ramalho, Ana Paula Duarte Gomes, Manuel Arlindo Amador de Matos, Luís António Da Cruz Tarelho. Economic analysis of a shared municipal solid waste management facility in a metropolitan region. Waste Management. 2019; 102 ():823-837.
Chicago/Turabian StyleDiogo Appel Colvero; José Ramalho; Ana Paula Duarte Gomes; Manuel Arlindo Amador de Matos; Luís António Da Cruz Tarelho. 2019. "Economic analysis of a shared municipal solid waste management facility in a metropolitan region." Waste Management 102, no. : 823-837.