Distribution of product gases from hydrogen generation of straw/CMC gasification in supercritical water
1. School of Environmental and Municipal Engineering, Xi＇an University of Architecture and Technology, Xi＇an, Shanxi 710055, China; 2. State Key Laboratory of Muhiphase Flow in Power Engineering, Xi＇an Jiaotong University, Xi＇an, Shanxi 710049, China）
Abstract：In order to look for a new technology for upgrading agriculture waste, hydrogen production from straw/carboxymethylcellulose （CMC） gasification in supercriticat water （SCW） was investigated by minimum Gibbs free energy theory and experimental methods. The results show that the main product gases are hydrogen, carbon dioxide and methane. There is very large difference in product gases distribution in different temperature range. In the undercritical water range（330 -374 ℃ ） , low supercritical wa- ter range（375 -430 ℃） and high supercritical water range（ ≥430 ℃ ）, hydrogen mole fraction increases from the lowest to the highest in the product gases. High temperature favors hydrogen generation, but the composition of product gases keeps constant when the temperature reaches a high value. Simultaneously, temperature and concentration of feedstock have larger effects than pressure on product gases. High heating value increases with concentration of feedstock, and decreases with temperature. It is proposed that the optimal temperature for hydrogen production from the mixture of 2% straw and 2% CMC gasification in SCW is 450 -600 ℃.
作者简介: 闰秋会(1965一)，女，陕西渭南人，副教授(yanqiuhui@xauat．edu．ca)，主要从事热能工程的研究．郭烈锦(1963一)，男，江西遂川人，教授，博士生导师(1j-guo@mail．xjtu．edu．en)，主要从事热能工程的研究 能源和环境压力的增加，迫使人们寻找可持续发展的清}吉新能源．氢不仅是最洁净的燃料，而且也是非常重要的化工原料，预计本世纪中叶氢能将与电能并重而成为主要终端能源¨j．但目前氢主要由不可再生的化石燃料制取，且制氢过程会对环境造成污染．利用生物质制氢能够实现CO，的近“零排放”，解决化石能源消耗带来的温室效应问题．我国足一个农业大国，含有大量的生物质资源，每年农作物秸秆产量在6亿吨以上，林业废弃物年产量约达3 700 m ，相当于2 000万吨标煤，有非常大的开发潜力，将生物质气化已成为生物质能转换为高品位能源的一种主要形式．
引用本文:
闫秋会, 郭烈锦. 麦秸与羧甲基纤维素钠的超临界水气化制氢[J]. 江苏大学学报（自然科学版）, 2008, 29(5): 415-418.
Yan Qiuhui, Guo Liejin. Distribution of product gases from hydrogen generation of straw/CMC gasification in supercritical water
[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2008, 29(5): 415-418.
2008, Vol. 29 
