Low-temperature activation of methane over rare earth metals promoted Zn/HZSM-5 zeolite catalysts in the presence of ethylene  

作　　者：Hengqiang Zhang Aiguo Kong Yongjie Ding Chengyong Dai Yongkui Shan 

机构地区：[1]Department of Chemistry, East China Normal University, Shanghai 200062, China

出　　处：《Journal of Natural Gas Chemistry》2011年第3期243-248,共6页天然气化学杂志（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grants No. 20273021);the Key Project of Shanghai Science and Technology Committee (No. 05JC14070, 06DZ05025, 0552nm042, 08JC1408600);Scientific Research Foundation of the Education Department of Heilongjiang Province (No.11544005)

摘　　要：At low temperature of 723 K, methane can be easily activated in the presence of ethylene in the feed, and converted to higher hydrocarbons （C2-C4） and aromatics （C6-C10）, through its reaction over rare metals modified Zn/HZSM-5 zeolite catalysts without undesirable carbon oxides formation. Methane can get 37.3% conversion over the above catalysts under low temperature, and the catalysts show a longer lifetime than usual metal supported HZSM-5 zeolite catalysts without adding any rare earth metals. The effects of methane activation over various rare earth metal promoted Zn/HZSM-5 catalysts on the products and influences of several reaction conditions such as temperature, catalyst lifetime and molar ratio of CH4/C2H4 have been discussed.At low temperature of 723 K, methane can be easily activated in the presence of ethylene in the feed, and converted to higher hydrocarbons （C2-C4） and aromatics （C6-C10）, through its reaction over rare metals modified Zn/HZSM-5 zeolite catalysts without undesirable carbon oxides formation. Methane can get 37.3% conversion over the above catalysts under low temperature, and the catalysts show a longer lifetime than usual metal supported HZSM-5 zeolite catalysts without adding any rare earth metals. The effects of methane activation over various rare earth metal promoted Zn/HZSM-5 catalysts on the products and influences of several reaction conditions such as temperature, catalyst lifetime and molar ratio of CH4/C2H4 have been discussed.

关 键 词：methane conversion HZSM-5 catalyst rare earth promoted 

分 类 号：TQ241[化学工程—有机化工] TE624.99[石油与天然气工程—油气加工工程]