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Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment
Bai, J; Liu, SL; Xie, SJ; Xu, LY; Lin, LW
关键词Ch4 Dehydroaromatization Mo/mcm-22 Coke Formation Shape Selectivity Specific Surface Area
刊名CATALYSIS LETTERS
2003-10-01
90期:3-4页:123-130
收录类别SCI
文章类型Article
部门归属804
项目归属804
产权排名1;1
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]MO-BASED CATALYSTS ; DEHYDRO-AROMATIZATION ; CONVERSION ; BENZENE ; ZEOLITE ; MO/HZSM-5 ; DEHYDROGENATION ; ACTIVATION ; OXYGEN
英文摘要Dehydroaromatization of CH4 with 2% CO2 on 6Mo/MCM-22 in a 100-h lifetime test was carried out at 993 K, atmospheric pressure and 1500 mL/gh. The duration of the lifetime test can be divided into an induction stage, stable stage and deactivation stage on the basis of the selectivities of hydrocarbons and coke. The characteristics of deposited coke with different time onstream were studied using TPO and TG techniques. There were two peaks corresponding to two kinds of coke recorded in TPO profiles, and the oxidation temperature of coke shifted to higher values with less hydrogen content with the increase of coke deposits. BET and Benzene-TPD techniques were employed to study the variation of specific surface area of the external and micropore surface versus time onstream. With the accumulation of coke deposits, although the pores became partially blocked and the internal surface decreased, methane could still enter the channel and was converted to benzene with shape selectivity until a critical value of coke deposition was reached.
语种英语
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WOS记录号WOS:000186636600003
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被引频次:27[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/83039
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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GB/T 7714
Bai, J,Liu, SL,Xie, SJ,et al. Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment[J]. CATALYSIS LETTERS,2003,90(3-4):123-130.
APA Bai, J,Liu, SL,Xie, SJ,Xu, LY,&Lin, LW.(2003).Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment.CATALYSIS LETTERS,90(3-4),123-130.
MLA Bai, J,et al."Shape selectivity in methane dehydroaromatization over Mo/MCM-22 catalysts during a lifetime experiment".CATALYSIS LETTERS 90.3-4(2003):123-130.
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