摘要
氢是未来理想的清洁能源,寻求大规模的、洁净的、廉价制氢技术是各国科学家共同关心的问题。该文提出串行流化床生物质制氢技术,将生物质热解气化和燃烧过程分隔开,气化反应器和燃烧反应器之间依靠催化剂颗粒进行热量传递,分析了串行流化床生物质制氢的化学反应机理,实现生物质催化气化高效制氢。利用Aspen Plus软件,建立串行流化床气化反应器模型,对生物质催化气化制氢进行了模拟计算,研究了气化过程中温度、催化剂种类(方解石、菱镁矿和白云石)、以及催化剂与生物质配比等变化因素对生物质气化制氢的影响。结果表明催化剂中CaO组分对生物质气化制氢过程的催化作用非常显著,气化反应温度为 700-750℃时较为适宜。
Hydrogen is an ideal clean energy in the future. It is a concerned problem for the researchers around the world to develop a large-scale, clean and cheap technology to produce hydrogen. Based on chemical-looping gasification, hydrogen production from biomass catalytic gasification in interconnected fluidized beds is presented and the gasification reaction mechanism is discussed. The fluidized bed materials consist of MgO and CaO particles, which can react to carbon dioxide and also are one kind of catalysts. The heat is transferred from the combustor to the gasifier by means of bed particles. The flue gas of the combustion and the fuel gas of the gasification are never mixed. Simulation of hydrogen production from biomass catalytic gasification is carried out with Aspen Plus software. The effects of gasification temperature and ratio of steam to biomass and catalyzer on the composition of fuel gas are discussed. The hydrogen yield can be improved greatly by catalytic gasification using calcium oxide and magnesia. And the suitable gasification temperature is at 700 -750 ℃ in this catalytic reaction.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第11期7-11,共5页
Proceedings of the CSEE
基金
国家自然科学基金项目(20590367
50306002)。
关键词
热力工程
串行流化床
生物质气化
制氢
数值模拟
thermal power engineering
interconnected fluidized beds
biomass gasification
hydrogen production
simulation
