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Post-steam-treatment of Mo/HZSM-5 catalysts: An alternative and effective approach for enhancing their catalytic performances of methane dehydroaromatization
Wang, HX; Su, LL; Zhuang, JQ; Tan, DL; Xu, YD; Bao, XH
刊名JOURNAL OF PHYSICAL CHEMISTRY B
2003-11-27
DOI10.1021/jp0225931
107期:47页:12964-12972
收录类别SCI
文章类型Article
部门归属502
项目归属502
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]ACID SITES ; NONOXIDATIVE CONDITIONS ; DEHYDRO-AROMATIZATION ; ZEOLITE CATALYSTS ; HZSM-5 ZEOLITE ; BRONSTED-ACID ; MAS NMR ; MOLYBDENUM ; CONVERSION ; BENZENE
英文摘要Post-steam-treatment is a facile and effective method for improving the catalytic performances of Mo/HZSM-5 catalysts in methane dehydroaromatization under nonoxidative conditions. The treatment can enhance the stability of the catalyst and also give a higher methane conversion and a higher yield of light aromatics, as well as a decrease in the formation rate of carbonaceous deposits. (27)Al, (29)Si, and (1)H multinuclear magic angle spinning nuclear magnetic resonance, X-ray photoelectron spectroscopy, X-ray diffraction, X-ray fluorescence spectroscopy, and thermogravimetric analysis measurements as well as catalytic reaction evaluations were employed to conduct comparative studies on the properties of the catalysts before and after the post-steam-treatment. The results revealed that the number of free Bronsted acid sites per unit cell decreased, while more Mo species migrated into the HZSM-5 channels for the 6Mo/HZSM-5 catalysts after the post-steam-treatment. In addition, the average pore diameter was also larger for the post-steam-treated catalysts, and this was advantageous for mass transport of the reaction products. However, a severe post-steam-treatment, i.e., with longer treating time, of the 6Mo/HZSM-5 catalyst will lead to the formation of the Al(2)(MoO(4))(3) phases, which is detrimental to the reaction.
语种英语
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WOS记录号WOS:000186762200009
引用统计
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/321008/82885
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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Wang, HX,Su, LL,Zhuang, JQ,et al. Post-steam-treatment of Mo/HZSM-5 catalysts: An alternative and effective approach for enhancing their catalytic performances of methane dehydroaromatization[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2003,107(47):12964-12972.
APA Wang, HX,Su, LL,Zhuang, JQ,Tan, DL,Xu, YD,&Bao, XH.(2003).Post-steam-treatment of Mo/HZSM-5 catalysts: An alternative and effective approach for enhancing their catalytic performances of methane dehydroaromatization.JOURNAL OF PHYSICAL CHEMISTRY B,107(47),12964-12972.
MLA Wang, HX,et al."Post-steam-treatment of Mo/HZSM-5 catalysts: An alternative and effective approach for enhancing their catalytic performances of methane dehydroaromatization".JOURNAL OF PHYSICAL CHEMISTRY B 107.47(2003):12964-12972.
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