甲烷丙烷在Mo/HZSM-5上共芳构化过程中的积碳研究  

Carbonaceous deposit during aromatization of CH_4 with C_3H_8 over Mo/HZSM-5 catalyst

作　　者：李秀东[1] 李望[1] 沈晓春[1] 楼辉[1] 郑小明[1] 

机构地区：[1]浙江大学催化研究所,浙江杭州310028

出　　处：《浙江大学学报（理学版）》2009年第4期419-422,429,共5页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(20343002;20433030);国家重点基础研究发展计划资助项目(2007CB201204)

摘　　要：研究了适当的预处理对缩短或消除Mo/HZSM-5催化剂上甲烷芳构化诱导期的作用.甲烷TPSR、甲烷脉冲反应、TPO、TPH等实验结果表明,芳构化反应后的催化剂至少存在着含氢和不含氢两类积碳物种,其中含氢的活性积碳的是芳构化反应的关键中间步骤.本文认为由于丙烷比甲烷更容易生成这种活性积碳,这就是丙烷能促进甲烷芳构化的原因.The influence of pre treatment conditions on reducing the induction period of methane aromatization on Mo/HZSM 5 was investigated via methane temperatureprogrammed surface reaction （TPSR）, methane pulse reaction, temperature-programmed oxidation （TPO）, temperature-programmed hydrogenation （TPH）. It was found that there were at least two kind of carbonaceous species, with or without hydrogen formed on the catalyst during CH4-TPSR. The former may be necessary for benzene formation. Propane which is easily decomposed on the surface to form active carbonaceous species, promoted the aromatization of methane.

关 键 词：芳构化 诱导期 积碳 

分 类 号：O657[理学—分析化学]