原料气组成对Na_2WO_4-Mn/SiO_2催化剂上甲烷氧化偶联的影响  

Effects of Feed Gas Composition on Oxidative Coupling of Methane over Na_2WO_4-Mn/SiO_2 Catalyst

作　　者：柳海涛[1] 杨得信[1] 高润雄[1] 李顺清[1] 王晓来[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000

出　　处：《石油化工》2007年第2期118-121,共4页Petrochemical Technology

摘　　要：研究了原料中C2H6,CO,CO2含量对Na2WO4-Mn/SiO2催化剂的甲烷氧化偶联反应活性的影响,并在此基础上对甲烷氧化偶联反应的两段反应器工艺进行了研究。实验结果表明,提高原料中C2H6的含量,会抑制甲烷的转化,同时使CO的生成量增加;随原料中CO含量的增加,CO2的生成量有所增加,但反应过程中CO的生成量明显减少;提高原料中CO2的含量对Na2WO4-Mn/SiO2催化剂的活性影响不明显。两段反应器工艺可有效提高乙烯收率,使甲烷转化率达60.5%,C2选择性达62.8%,乙烯收率达33.1%。Effects of ethane, CO and CO2 contents in feed gas on activity of Na2WO4 - Mn/SiO2 catalyst in oxidative coupling of methane （OCM） were investigated. OCM was carded out in a two - stage fixed bed micro- reactor. Increase of ethane content in feed gas inhibits methane conversion and promotes formation of CO to a certain extent. Increase of CO content in feed gas leads to production of CO2, but inhibits production of CO. Change of CO2 content in feed gas has little effect on activity of catalyst. The two -stage reactor is an effective measure to increase yield of ethylene. Conversion of methane, selectivity to C2 components and yield of ethylene can reach 60.5%, 62.8% and 33.1%, respectively.

关 键 词：甲烷 氧化偶联 乙烷 一氧化碳 二氧化碳 乙烯 两段反应器 催化剂 

分 类 号：TQ221.21[化学工程—有机化工]