Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81581
Type: Artigo de periódico
Title: Oxidative reforming of methane for hydrogen and synthesis gas production: Thermodynamic equilibrium analysis
Author: Freitas, ACD
Guirardello, R
Abstract: A thermodynamic analysis of methane oxidative reforming was carried out by Gibbs energy minimization (at constant pressure and temperature) and entropy maximization (at constant pressure and enthalpy) methods, to determine the equilibrium compositions and equilibrium temperatures, respectively. Both cases were treated as optimization problems (non-linear programming formulation). The GAMS (R) 23.1 software and the CONOPT2 solver were used in the resolution of the proposed problems. The hydrogen and syngas production were favored at high temperatures and low pressures, and thus the oxygen to methane molar ratio (O-2/CH4) was the dominant factor to control the composition of the product formed. For O-2/CH4 molar ratios higher than 0.5, the oxidative reforming of methane presented autothermal behavior in the case of either utilizing O-2 or air as oxidant agent, but oxidation reaction with air possessed the advantage of avoiding peak temperatures in the system, due to change in the heat capacity of the system caused by the addition of nitrogen. The calculated results were compared with previously published experimental and simulated data with a good agreement between them.
Subject: thermodynamic analysis
methane oxidative reforming
Gibbs energy minimization
entropy maximization
hydrogen and syngas production
Country: Holanda
Editor: Elsevier Science Bv
Rights: embargo
Identifier DOI: 10.1016/S1003-9953(11)60406-4
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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