Study on Hydrogen Production from Catalytic Conversion of Biomass
The prospective future of hydrogen production from biomass gasification has attracted increasing concerns all over the world. High hydrogen yields can be achieved through adequate process and reactor design, as well as the control of reaction conditions. Experiments of hydrogen production from catalytic conversion of biomass have been carried out in a bench scale system, which composed of a fluidized bed gasification reactor and a fixed bed catalytic conversion reactor. The reaction conditions of gasification are 700-900℃ and 0.1-0.2 MPa. As the gasifying agent, air is supplied into the fluidized bed reactor from the lower part of the reactor, and steam is added into the reactor above the biomass feeding location. Pine sawdust obtained from a timber mill is used as the feedstock.The effect of reaction conditions of gasification, gasifying agent, bifunctional catalysts with tar cracking and water gas shift reaction, as well as reaction conditions of fixed reactor have been studied. The experimental results show that bifunctional catalysts obviously promoted the conversion of tar into hydrogen rich gas and the conversion of carbon contained compound into hydrogen, therefore increased the content of hydrogen in produced gas. The conversion rates of tar cracking are between 72％～88％ in different cracking conditions. Over the ranges of test conditions, the highest gas yield of 3.31 Nm3/kg biomass (wet basis) and the highest hydrogen yield of 130.28 g/kg biomass (wet basis) are obtained. It is concluded that catalytic conversion of biomass is an effective method to produce hydrogen.
Jie CHANG Pengmei L(U) Tiejun WANG Yan FU
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences
国际会议
北京
英文
95-101
2003-10-08（万方平台首次上网日期，不代表论文的发表时间）