文章基本信息

标题：Effect of Reaction Temperature and Type of Catalyst on Hydrogen Production in Supercritical Water Gasification of Biomass
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作者：Ebrahimi-Nik Mohammadali, Mohammad Javad Sheikhdavoodi, Morteza Almassi, Andrea Kruse, Houshang Bahrami
期刊名称：Iranica Journal of Energy and Environment (IJEE)
印刷版ISSN：2079-2115
电子版ISSN：2079-2123
出版年度：2012
期号：3144
页码：202-209
出版社：Noshirvani University of TEchnology
摘要：The aim of this study was to investigate the feasibility of hydrogen production from sugarcane bagasse by supercritical water gasification (SCWG) at low temperature and in presence of alkali catalyst. Experiments were carried out in a batch autoclave reactor at 400 °C and 9% solid content. Effect of reaction time and alkali catalyst on gas yield, gas composition, carbon gasification efficiency (CGE) and hydrogen gasification efficiency (HGE) were investigated. Influence of reaction time on gas yield and composition as well as on CGE was found to be insignificant. Extending the reaction time even up to 4 h could not cause an attractive conversion of bagasse. In the presence of catalysts (K2CO3, KHCO3, NaHCO3 and NaOH), sugarcane bagasse was partially gasified in SCW and hydrogen-rich gas containing CO2 as the main carbon compound was produced. Among the implemented catalysts, K2CO3 was identified to be the most effective for improvement of HGE. Use of the catalyst under our experimental conditions, the maximum HGE of 19% was achieved; however the highest CGE occurred with KHCO3. Results showed that feed to catalyst ratio of 2 was high enough to reach the greatest possible gasification of hydrogen at 400 °C and 45 min. More CGE and HGE would be possible only by increasing the temperature, pressure and/or reaction time.