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题名: A facile and effective method for the distribution of Mo/HZSM-5 catalyst active centers
作者: Wang, HX;  Hu, G;  Lei, H;  Xu, YD;  Bao, XH
关键词: methane dehydro-aromatization ;  Mo/HZSM-5 ;  post-steaming treatment ;  Bronsted acid sites
刊名: CATALYSIS LETTERS
发表日期: 2003-07-01
卷: 89, 期:1-2, 页:75-79
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
英文摘要: Post-steaming treatment of Mo/HZSM-5 catalysts results in more molybdenum species migrating into and residing in the HZSM-5 zeolite channels. This is confirmed by XRF and XPS measurements. H-1 MAS NMR and Si-29 MAS NMR also demonstrate that the number of free Bronsted acid sites decreases in the Mo/HZSM-5 catalysts that underwent post-steaming treatment, compared to untreated Mo/HZSM-5 catalysts. As a result, the deactivation rate constant (kd) on the Mo/HZSM-5 catalyst after post-steaming treatment for 0.5 h is much smaller, and the catalyst therefore shows remarkable stability in the probe reaction of methane dehydro-aromatization. The results suggest that a more beneficial bi-functional balance between active Mo species for methane activation and acid sites for the following aromatization is developed over those Mo/HZSM-5 catalysts that have experienced post-steaming treatment for 0.5 h, in comparison with the untreated Mo/HZSM-5 catalysts.
关键词[WOS]: METHANE DEHYDRO-AROMATIZATION ;  ACID SITES ;  NONOXIDATIVE CONDITIONS ;  ZEOLITE ;  MO ;  MO/H-ZSM5 ;  EPR
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000184187500012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82873
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Wang, HX,Hu, G,Lei, H,et al. A facile and effective method for the distribution of Mo/HZSM-5 catalyst active centers[J]. CATALYSIS LETTERS,2003,89(1-2):75-79.
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