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| Author(s): |
Jan Galvão Gomes
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Química |
| Defense date: | 2022-03-04 |
| Examining board members: |
Reginaldo Guirardello;
Lúcio Cardozo Filho;
Luís Fernando Mercier Franco
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| Advisor: | Reginaldo Guirardello |
| Abstract | |
The production of biofuels from different types of biomass has gained space in recent decades due to the scarcity of fossil fuel reserves and socio-environmental factors. Given this, new technologies are indispensable for the efficient generation of fuels through the thermochemical conversion of different types of biomass. In this work, the catalytic conversion reaction of biomass was studied in subcritical (SbCWG) and supercritical (SCWG) water aiming at maximizing hydrogen formation. The modeling of such a system was performed through chemical equilibrium and combined phase calculations, using the methodologies of global minimization of Gibbs energy - MinG (for isothermal and isobaric systems) and entropy maximization - MaxS (for isobaric and isenthalpic systems) employing the Peng-Robinson cubic equation of state to calculate the fugacity coefficients with a thermodynamic model. The methods will be formulated as optimization problems through non-linear programming and solved in the GAMS software. Thus, the purpose of this work was to evaluate the calculation of chemical equilibrium and phases of subcritical and supercritical gasification of lignocellulosic biomass sources using the cubic equation of state to represent the non-idealities. With the results of this work, we hope to contribute to a better understanding, from a thermodynamic point of view, of which reactional pathways lead to the decomposition of biomass, the formation of intermediate compounds, and the subsequent formation of H2. In addition, a better understanding of the thermal behavior and phases along the reactions of biomass transformation in sub and supercritical conditions and, finally, an economic evaluation to verify the feasibility of implementing the system on an industrial scale (AU) | |
| FAPESP's process: | 20/03823-1 - Thermodynamic characterization of the sub and supercritical gasification reaction of lignocellulosic biomass |
| Grantee: | Jan Galvão Gomes |
| Support Opportunities: | Scholarships in Brazil - Master |