A ^(13)CO isotopic study on the CO promotion effect in methane dehydroaromatization reaction over a Mo/HMCM-49 catalyst  

作　　者：Songdong Yao, Changyong Sun, Juan Li, Xiumin Huang, Wenjie Shen State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China 

出　　处：《Journal of Natural Gas Chemistry》2010年第1期1-5,共5页天然气化学杂志（英文版）

基　　金：supported by the National Basic Research Program of China (2005CB221400)x

摘　　要：The promotion effect of CO in methane dehydroaromatization was investigated using ^13CO probe molecules. By alternative injection of ^13CO to the methane feed, the distribution of ^13CxC6-xH6（x= 0-3） products changed significantly, confirming the participation of ^13CO in the reaction network. The addition of ^13CO did not change the conversion of CH4 but improved slightly the durability of the methane dehydroaromatization （MDA） reaction, which might be caused by the interaction of the dissociated oxygen species and the deposited carbon species. The ratio of ^13CxC6-xH6 （x = 0-3） varied with the time on stream, which was determined by the competitive reactions of methane decomposition and ^13CO dissociation.The promotion effect of CO in methane dehydroaromatization was investigated using ^13CO probe molecules. By alternative injection of ^13CO to the methane feed, the distribution of ^13CxC6-xH6（x= 0-3） products changed significantly, confirming the participation of ^13CO in the reaction network. The addition of ^13CO did not change the conversion of CH4 but improved slightly the durability of the methane dehydroaromatization （MDA） reaction, which might be caused by the interaction of the dissociated oxygen species and the deposited carbon species. The ratio of ^13CxC6-xH6 （x = 0-3） varied with the time on stream, which was determined by the competitive reactions of methane decomposition and ^13CO dissociation.

关 键 词：^13CO labeling methane dehydroaromatization Mo/HMCM-49 catalyst deactivation 

分 类 号：O621.2[理学—有机化学]