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Thermodynamic characterization of the sub and supercritical gasification reaction of lignocellulosic biomass

Grant number: 20/03823-1
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2020
Effective date (End): February 28, 2022
Field of knowledge:Engineering - Chemical Engineering
Principal researcher:Reginaldo Guirardello
Grantee:Jan Galvão Gomes
Home Institution: Faculdade de Engenharia Química (FEQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:15/20630-4 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity, AP.TEM

Abstract

The production of biofuels from different types of biomass has gained ground in recent decades, mainly due to the search for sustainable and renewable alternative fuels. Therefore, new technologies are indispensable for efficient fuel generation through the thermochemical conversion of different types of biomass. In this work, the catalytic conversion reaction of biomass will be studied in subcritical (SbCW) and supercritical (SCWG) water in order to maximize the formation of hydrogen. The modeling of such a system can be carried out through chemical equilibrium and combined phase calculations, using global Gibbs energy minimization methodologies (for isothermal and isobaric systems) and entropy maximization (for isobaric and isenthalpic systems) of the system using the cubic equation of state of Peng-Robinson in the calculation of fugacity coefficients with a rigorous thermodynamic modeling. The models will be formulated as optimization problems through non-linear programming and solved in the GAMS software. Thus, the purpose of this work is to carry out an evaluation of the calculation of chemical balance and phases of subcritical and supercritical gasification of sources of lignocellulosic biomass using cubic equations of state to represent non-idealities, with the results of this work we hope to contribute to a better understanding , within the thermodynamic point of view, which relational pathways lead to the decomposition of biomass, the formation of intermediate compounds and subsequent formation of H2 in addition to a better understanding of the thermal behavior and phases along the reactions of biomass transformation under conditions sub and supercritical. (AU)