PABLO SILVA ORTIZ

Prof. Dr. PABLO SILVA ORTIZ

orcid
avatar
Co-authors
avatar
Following
avatar
Followers

Research Focus & Metrics

Explore full metrics on Scilit

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 November 2014 in Energy
Verified
Journal Article
Closed access
POPABLO SILVA ORTIZ
PABLO SILVA ORTIZ
SOSilvio de Oliveira
Silvio de Oliveira
1 November 2020 in Fuel
Verified
Journal Article
Closed access
POPABLO SILVA ORTIZ
PABLO SILVA ORTIZ
FMFrançois Maréchal
François Maréchal
SJSilvio de Oliveira Junior
Silvio de Oliveira Junior
8 October 2021 in Frontiers in Chemical Engineering
Verified
Journal Article
Open access
POPABLO SILVA ORTIZ
PABLO SILVA ORTIZ
SMSimon Maier
Simon Maier
RDRalph-Uwe Dietrich
Ralph-Uwe Dietrich
AMAdriano Pinto Mariano
Adriano Pinto Mariano
RFRubens Maciel Filho
Rubens Maciel Filho
JPJohn Posada
John Posada
In this work, the techno-economic and exergy analyses of two gasification technologies with integration into heat and power combined cycles are presented: i). Circulating fluidized bed (CFB) and ii). Dual fluidized bed (DFB) systems. As feedstock, lignocellulosic biomass (sugarcane bagasse, SCB) was considered. The gasification process of the fluidized-bed systems (circulating and dual bed) and the syngas conversion were performed using Aspen Plus® software. The process design includes biomass drying and gasification, syngas cleaning, combustion, power generation, and heat recovery. The SCB-DFB system has the lowest irreversibility rate and, as a result, the highest overall performance and power generation (achieving 32% in the gasification system and 53% of exergy efficiency when coupled with the combined cycle). From the techno-economic assessment, the SCB-DFB system has the lowest total production costs per unit of energy. Hence, the dual fluidized bed systems could be a more competitive technology for the agro-industrial sector to generate power from lignocellulosic materials.
22 March 2024 in Journal of Energy Resources Technology
Verified
Journal Article
Closed access
PDF file
GVGabriel Gomes Vargas
Gabriel Gomes Vargas
POPABLO SILVA ORTIZ
PABLO SILVA ORTIZ
SJSilvio De Oliveira Júnior
Silvio De Oliveira Júnior
27 September 2019 in Processes
Verified
Journal Article
Open access
PDF file
POPABLO SILVA ORTIZ
PABLO SILVA ORTIZ
RFRubens Maciel Filho
Rubens Maciel Filho
JPJohn Posada
John Posada
This paper presents the process design and assessment of a sugarcane-based ethanol production system that combines the usage of both mass and heat integration (pinch analysis) strategies to enhance the process efficiency and renewability performance. Three configurations were analyzed: (i) Base case: traditional ethanol production (1G); (ii) mass-integrated (1G2G); and (iii) mass and heat-integrated system (1G2G-HI). The overall assessment of these systems was based on complementary approaches such as mass and mass–heat integration, energy and exergy analysis, exergy-based greenhouse gas (GHG) emissions, and renewability exergy criteria. The performances of the three cases were assessed through five key performance indicators (KIPs) divided into two groups: one is related to process performance, namely, energy efficiency, exergy efficiency, and average unitary exergy cost (AUEC), and the other one is associated to environmental performance i.e., exergy-based CO2-equation emissions and renewability exergy index. Results showed a higher exergy efficiency of 50% and the lowest AUEC of all the systems (1.61 kJ/kJ) for 1G2G-HI. Furthermore, the destroyed exergy in 1G2G-HI was lower by 7% and 9% in comparison to the 1G and 1G2G cases, respectively. Regarding the exergy-based GHG emissions and renewability performance (λindex), the 1G2G-HI case presented the lowest impacts in terms of the CO2-equivalent emissions (94.10 gCO2-eq/MJ products), while λindex was found to be environmentally unfavorable (λ = 0.77). However, λindex became favorable (λ > 1) when the useful exergy of the byproducts was considered.
1 March 2024 in Processes
Verified
Journal Article
Open access
PDF file
POPABLO SILVA ORTIZ
PABLO SILVA ORTIZ
SJSilvio De Oliveira Júnior
Silvio De Oliveira Júnior
AMAdriano Pinto Mariano
Adriano Pinto Mariano
AJAgnes Jocher
Agnes Jocher
JPJohn Posada
John Posada
The aeronautical sector faces challenges in meeting its net-zero ambition by 2050. To achieve this target, much effort has been devoted to exploring sustainable aviation fuels (SAF). Accordingly, we evaluated the technical performance of potential SAF production in an integrated first- and second-generation sugarcane biorefinery focusing on Brazil. The CO2 equivalent and the renewability exergy indexes were used to assess environmental performance and impact throughout the supply chain. In addition, exergy efficiency (ηB) and average unitary exergy costs (AUEC) were used as complementary metrics to carry out a multi-criteria approach to determine the overall performance of the biorefinery pathways. The production capacity assumed for this analysis covers 10% of the fuel demand in 2020 at the international Brazilian airports of São Paulo and Rio de Janeiro, leading to a base capacity of 210 kt jet fuel/y. The process design includes sugarcane bagasse and straw as the feedstock of the biochemical processes, including diverse pre-treatment methods to convert lignocellulosic resources to biojet fuel, and lignin upgrade alternatives (cogeneration, fast pyrolysis, and gasification Fischer-Tropsch). The environmental analysis for all scenarios shows a GHG reduction potential due to a decrease of up to 30% in the CO2 equivalent exergy base emissions compared to fossil-based jet fuel.