Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18069
Title: Integrating chemical kinetics with CFD modeling for autothermal reforming of biogas
Authors: Xuan, J
Leung, MKH
Leung, DYC
Ni, M 
Keywords: Hydrogen
Methane
Pd-Ag membrane
Perovskite membranes
Issue Date: 2009
Publisher: Pergamon Press
Source: International journal of hydrogen energy, 2009, v. 34, no. 22, p. 9076-9086 How to cite?
Journal: International journal of hydrogen energy 
Abstract: Using biogas for hydrogen production via autothermal reforming (ATR) can potentially increase the energy conversion efficiency and correspondingly reduce environmental impact. The present study aimed to investigate the performance and characteristics of biogas ATR. A two-dimensional numerical model was developed based on the integration of computational fluid dynamics (CFD) and chemical kinetics. The mass transport, chemical reactions and heat transfer can be analyzed simultaneously in the porous domain. The results show that the presence of CO2 in the feedstock will reduce the performance of the biogas ATR. The effects of operating and feeding conditions were examined and the optimal conditions were identified. Operating the reformer with the steam-to-CH4 ratio (S/CH4) and air-to-CH4 ratio (A/CH4) equal to 0.5 and 2, respectively, can achieve high H2 concentration, while operation with S/CH4 and A/CH4 equal to 4.5 and 2, respectively, can achieve high energy efficiency. The results also show that using either H2 or O2 membrane in the reformer can enhance the biogas autothermal reforming performance by producing high concentration of H2 (40-65%) and solving the harmful hot spot problems.
URI: http://hdl.handle.net/10397/18069
ISSN: 0360-3199
EISSN: 1879-3487
DOI: 10.1016/j.ijhydene.2009.09.002
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