超临界水中半纤维素气化制氢的影响因素分析  

Influence of Main Parameters on Gasification of Hemicellulose in Supercritical Water

作　　者：关宇[1] 裴爱霞[1] 郭烈锦[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《西安交通大学学报》2007年第1期9-13,共5页Journal of Xi'an Jiaotong University

基　　金：国家"九七三"重点基础研究计划项目(2003CB214500);国家自然科学基金会优秀重点实验室基金;国家自然科学基金会创新研究群体科学基金资助项目(50323001;50521604)

摘　　要：以碱性化合物K2CO3、Ca(OH)2以及Ru/C为催化剂,在间歇式高压反应釜中,对半纤维素在超临界水中的气化制氢特性进行了实验研究.结果表明:3种催化剂都有较好的催化作用,其中Ru/C的效果最佳,当加入0.8 g时,每千克半纤维素可生成14.365 mol H2,约为不加入催化剂时的3.8倍,为单独加入K2CO3、Ca(OH)2时的1.6和1.9倍,气化率和氢转化率也有很大提高,分别达到77%和126%.同时,催化剂混合使用要比单独一种催化剂的效果好.温度的提高可明显提高H2产量,同时降低CH4产量.此外,停留时间对气化效果也有一定的影响,20 min时气化效果最佳.The gasification of hemicellulose in supercritical water to produce hydrogen-rich gas was performed, and KECO3 ,Ca （OH）2 and Ru/C were used as catalysts during the gasification processes. The experimental results show that all the catalysts have good catalytic effect on the gasification of hemicellulose and for hydrogen production, in which Ru/C is the best one. Hydrogen production reaches 14. 365 mol when added 0.8 g Ru/C to 1 kg hemicellulose, which is 1.6 and 1.9 times that when K2CO3 and Ca（OH）E were added respectively. The hydrogen productivity with the mixture of several catalysts mentioned above is greater than that with a single catalyst. Temperature increasing could obviously improve the productivity of hydrogen, and reduce methane pro- duction. In addition, different residence times affect the gasification, and 20 minutes is optimal.

关 键 词：生物质 超临界水 气化 氢气 

分 类 号：TK91[动力工程及工程热物理]