微细腔内变组分CH4/O2/H2O自热重整积碳特性  

NUMERICAL SIMULATION ON CARBON DEPOSITION CHARACTERISTICS OF MIXTURE COMPONENT ON CH4/O2/H2O AUTOTHERMAL REFORMING REACTION IN A MICRO-CHAMBER

作　　者：冉景煜[1] 涂维峰[1] 闫云飞[1] 陈兵兵[1] 

机构地区：[1]重庆大学动力工程学院

出　　处：《工程热物理学报》2010年第8期1335-1338,共4页Journal of Engineering Thermophysics

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

摘　　要：针对微动力装置中重整腔内催化剂表面容易积碳,重整反应需要大量能量等问题,在重整腔入口引入氧气,使甲烷发生部分氧化反应为催化重整提供热量。本文采用数值方法研究了微细腔中CH4/O2/H2O镍基催化剂上的自热重整反应,重点分析CH4/O2/H2O混合物组分对甲烷自热重整反应及积碳的影响。结果表明：在混合物组分CH4/O2/H2O摩尔比为1：0.2：2时,甲烷自热反应放热量刚好能满足甲烷重整反应的需求,氢气质量分数较高为3.32%,积碳浓度较低为1.19×10^-6 kmol/m^2。A large quantity of heat energy is required in the process of methane reforming reaction, and the carbon is easily deposited on the catalyst surface of the micro-reforming chamber.To add any oxygen to mixture can provide a quantity of heat energy for the catalytic reforming reaction because of part oxidation of methane,and the density of surface carbon deposition will decrease.In this paper,the effect of mixture component on the CH4/O2/H2O auto-thermal reforming reaction with Ni catalyst of the micro-chamber＇s surface was simulated.The results show that the mole ratio of CH4/O2/H2O is 1：0.2：2,the auto-thermal reaction exothermic quantity can well meet the energy requirements of reforming reaction,the mass fraction of H_2 can reach 3.32%,the density of surface carbon deposition is 1.19×10^-6 kmol/m^2.

关 键 词：微细腔 自热重整 积碳 混合物组分 

分 类 号：TK121[动力工程及工程热物理—工程热物理]