Análise termodinâmica da reforma com vapor de água de um composto modelo de bio-óleo para produção de hidrogênio

• Autor(a) principal: Trevisan, Ivo Junior
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/9187
• topic: Reforma com vapor de água; Bio-óleo; Análise termodinâmica; Minimização de Gibbs; Steam reforming; Bio-oil; Thermodynamicanalysis; Gibbsminimization; CIENCIAS EXATAS E DA TERRA::QUIMICA

In this work, a thermodynamic analysis of the water vapor reforming reaction of a bio-oil model compound was performed and the objective is producing hydrogen through an alternative source of fossil fuels. The bio-oil model compound was considered to be a molar fraction of 1:1:1 mixture of phenol, acetic acid and hydroxyketone and the thermodynamic data were obtained in DIPPR® software version 1.2.0. The chemical and phase equilibrium were calculated by the Gibbs energy minimization method. Constant pressure of 1 bar, temperature ratio from 673.15K to 1273.15K and water and carbon ratio of the substrate (H2O(v)/C(ent)) of 0.01 to 3.00 were used to construct the optimization problem and the software GAMS® version 2.0.29.8 was used by optimization problem resolution. The gas phase was considered with behavior of ideal gas and the solid phase was considered with solid carbon. Hydrogen, water, carbon monoxide, carbon dioxide, solid carbon and methane formation data were collected after solving the optimization problem and the reaction heat and syngas production were also analyzed. The maximum hydrogen yield obtained was 1.3 moles in the 1100 K region with 1 mole water per carbon of the substrate (H2O(v)/C(ent)). It was also observed that the greater amount of syngas occurs in the 950 K region and 1,2 of the H2O(v)/C(ent) ratio. An exothermic region and an exothermic region were observed in the reaction heat analysis and in the exothermic region there is a higher incidence of coke and methane generation and in the endothermic region a higher incidence of hydrogen and carbon monoxide generation.