煤制天然气过程催化甲烷化的数值模拟  

Numerical simulation of catalytic methanation process of producing natural gas using coal

作　　者：王翠苹[1] 李刚[1] 李厚洋[1] 姜旭[1] 

机构地区：[1]青岛大学能源工程研究所,山东青岛266071

出　　处：《热科学与技术》2015年第1期82-86,共5页Journal of Thermal Science and Technology

基　　金：山东省自然科学基金项目资助(ZR2010EM004)

摘　　要：两步法煤制天然气的第一步反应主要生产粗煤气CO和H2,调整CO与H2的比值后进行甲烷化反应。在计算软件HSC中分别控制反应温度、压力和CO与H2比例,计算了甲烷化产物变化规律,得到第二步甲烷化反应最适条件是1.8 MPa、700℃;通过在计算软件FLUENT中进行一步对催化甲烷化反应的模拟,0.1MPa、720℃时的催化甲烷化即可达到无催化高压条件的甲烷摩尔产率,甲烷化产率最高时对应的n(H2)∶n(CO)比值为1.8。The main products from the first step reaction of the two-step coal gasification are CO and H2,and the ratio of CO to H2 can be adjusted for the next methanation reaction step.A computing software HSC was used to compute the methanation product changing trend by controlling the reaction temperature,pressure and CO/H2 ratio,and the optimum condition for the second step reaction was derived as 1.8 MPa and 700 ℃.The catalytic methanation reaction was simulated using commercial software Fluent,and the coal gasification and methanation reaction occurred successively in a one-step reactor.The methanation productivity of catalytic methanation under the condition of720 ℃ and 0.1 MPa is comparable to the high pressure production without catalytic reaction.The CO/H2 ratio of is up to 1.8when the highest methanation yield is achieved.

关 键 词：HSC 甲烷产率 FLUENT 催化甲烷化 

分 类 号：TQ546[化学工程—煤化学工程]