生物质超临界水气化制氢反应建模及数值模拟  

MODELING AND NUMERICAL SIMULATION OF HYDROGEN PRODUCTION WITH SUPERCRITICAL WATER GASIFICATION OF BIOMASS

作　　者：郭斯茂[1] 郭烈锦[1] 吕友军[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：《太阳能学报》2011年第6期929-935,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金委创新群体基金(No.50821064);国家重点基础研究发展计划(973)项目(No.2009CB220000)

摘　　要：建立了管式反应器中生物质超临界水气化制氢反应的数学模型,同时提出了以葡萄糖做为生物质模型化合物的全局气化反应动力学模型。模型计算结果与实验值的比较表明该模型能较好的预测反应器出口温度与气体产物组份分布。利用该模型数值模拟计算得到了反应器中温度场、速度场基本情况以及化学反应速率分布的基本规律。该文通过计算还讨论了反应器入口水温、反应器壁温以及物料和预热水之比对反应器内气化反应的影响,得出一系列重要结论。该模型对生物质超临界水反应器系统的优化设计与化学反应最佳工况的选择有一定的实用价值。A computational fluid dynamics （CFD） model was established for hyhrogen production with supercritical water gasification （SCWG） of biomass in a tubular reactor and the kinetic models for supercritieal water gasification of glucose was also proposed. These models results were validated by comparing with experimental data of reactor outlet temperature and gas yield distribution from a tubular reactor. The detailed flow field, temperature distribution, and chemical component distribution inside the reactor were revealed using this CFD model. The effects of different process parameters including the inlet water temperature, wall temperature of reactor, and the ratio of flow. rate between feedstock and preheated water on the distributions of temperature, reaction rate and chemical components inside the reactor were also investigated by the model, and a series of conclusions was achieved. The model and numerical results obtained in this paper are valuable in optimal design of a tubular reactor and optimal choice of the operation conditions in supercritical water gasification of biomass.

关 键 词：生物质 制氢 超临界水气化 数值模拟 

分 类 号：TK91[动力工程及工程热物理]