Experimental study of dual fixed bed biochar-catalytic gasification with simultaneous feed of O2-steam-CO2 for synthesis gas or hydrogen production |
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| Authors: | Paripat Kraisornkachit Supawat Vivanpatarakij Jon Powell Suttichai Assabumrungrat |
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| Affiliation: | 1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Wang Mai, Phatumwan, Bangkok, 10330, Thailand;2. Energy Research Institute, Chulalongkorn University, Phyathai Road, Wang Mai, Phatumwan, Bangkok, 10330, Thailand;3. Energy Engineering Research Group, Faculty of Science and Engineering, University of Nottingham Ningbo China, 199 Tai Kang East Road, Ningbo, 315100, China |
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| Abstract: | The catalytic gasification of biochar was investigated in the presence of a Ni/SiO2 catalyst in a fixed bed reactor with an O2-steam-CO2 gas feed. The effects of operating temperature, catalyst nickel loading and composition of O2-steam-CO2 feed gas on biochar carbon conversion and gas products were investigated. The results indicate that the highest biochar carbon conversion could be obtained at approximately 800 °C, whilst the 10% Ni/SiO2 catalyst was shown to produce the greatest syngas yields. The presence of O2 in the feed gas can result in slightly more CO in the gas product, whilst a higher steam content leads to more H2 in the gas product. The CO2 offered a benefit as an adjusting agent for achieving a desired H2/CO ratio. No evidence of coke deposition on the catalyst was found under any of the tested conditions. |
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| Keywords: | Biochar gasification Catalytic gasification Syngas |
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