生物质在超临界水流化床系统中部分氧化气化制氢  

Hydrogen Production by Partial Oxidation Gasification of Biomass in Supercritical Water with Fluidization Bed Reactor

作　　者：吕友军[1] 金辉[1] 郭烈锦[1] 张西民[1] 曹长青[1] 郭鑫[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》2009年第1期5-9,共5页Journal of Xi'an Jiaotong University

基　　金：国家重点基础研究发展规划资助项目(2003CB214500)

摘　　要：从理论的角度对超临界水部分氧化过程进行分析,利用已建立的热力学模型计算了反应过程的化学平衡.热力学研究表明:随着氧化剂当量的增加,H2、CH4、CO的平衡产量减少,CO2的平衡产量增加,而且H2的体积分数也随之减少.在实验室新研制的超临界水流化床系统中,研究了生物质模型化合物(葡萄糖)以及原生生物质(玉米芯)的部分氧化气化制氢.实验结果表明:氧化剂的加入大大提高了生物质的气化率,但降低了气体产物中H2的体积分数;在质量分数为10%的葡萄糖部分氧化气化过程中,当氧化剂(H2O2)当量为0.2(质量分数为4.53%)时,H2的绝对产量达到了最大值.Supercritical partial oxidation is a new technology which combines supercritical water gasification with supercritical water oxidation for high efficient hydrogen production from biomass. Supercritical partial oxidation process was analyzed theoretically, and chemical equilibrium was calculated using the thermodynamic model. It is found that the equilibrium yield of hydrogen, methane, carbon monoxide, and the molar fraction of hydrogen decrease,while the equilibrium yield of carbon dioxide increases with the increase of the oxidant equivalence ratio. Experiments on hydrogen production by partial oxidation of model compound （glucose） and real biomass （corn cob） with SCW fluidization bed were also conducted. The results show that the gasification efficiency increases sharply with the addition of oxidant which reduces the molar fraction of hydrogen. During partial oxidation gasification process of 10% glucose, the hydrogen yield reaches maximum when the oxidant （H2O2） equivalence ratio is 0. 2 （i. e. , mass fraction of 4. 53%）.

关 键 词：超临界水 部分氧化 制氢 热力学 流化床 

分 类 号：TK91[动力工程及工程热物理]