微细腔内CO_2对CH_4/H_2O重整反应特性影响  

NUMERICAL SIMULATION ON THE CHARACTERISTICS OF CH_4-VAPOR REFORMING REACTION OCCURRING CO_2 IN THE MICRO-CHAMBER

作　　者：蒲舸[1] 牛立祥[1] 冉景煜[1] 张力[1] 唐强[1] 闫云飞[1] 

机构地区：[1]重庆大学动力工程学院,重庆400030

出　　处：《工程热物理学报》2010年第2期335-338,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50876118);教育部新世纪优秀人才计划(No.NCET-08-0605)

摘　　要：基于镍基催化剂下表面反应机理,采用数值模拟方法,深入研究了在一定水碳比下,CO_2含量的变化以及在固定的CH_4/H_2O/CO_2比例下催化壁面温度,质量流量对微细腔内甲烷重整反应的影响。结果表明提高CO_2/CH_4的比例能够明显提高CO_2、CH_4转化率,提高CO的含量。CH_4/CO_2基元反应的产物在低温条件下CO和H_2O,水蒸气转化率和H_2产量降低,CO_2含量增加降低水蒸气的消耗;在高温条件下,由于产生CO和H_2,使氢气含量增加但水蒸气转化率降低.Considered Ni catalyst surface reaction mechanism,the methane reforming reaction characters were simulated in the Micro-Chamber with the different content of CO2,the different temperature of the micro chamber wall（to keep the ratio of CH4/H2O/CO2）,and the different mass flow-rate in a certain vapor/methane mole ratio.Results show that increasing the CO2/CH4 mole ratio,the CO2 and the CH4conversion ratio are ascended,and the concentration of CO is raised.For low temperature,the productions of CH4/CO2 surface elementary reaction are CO and H2O,the H2O and the H2 conversion ratio is reduced.For high temperature,the productions of CH4/CO2 surface elementary reaction are CO and H2,the H2conversion ratio is increased,but the H2O conversion ratio is dropped.

关 键 词：微细腔 甲烷 壁面反应 CO2 重整特性 

分 类 号：TK16[动力工程及工程热物理—热能工程]