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题名: Methane dehydroaromatization with periodic CH4-H-2 switch: A promising process for aromatics and hydrogen
作者: Sun, Changyong1, 2;  Fang, Guangzong1;  Guo, Xiaoguang1;  Hu, Yuanli1;  马书启;  Yang, Tianhua3;  Han, Jie3;  Ma, Hao1;  Tan, Dali1;  Bao, Xinhe1
关键词: methane dehydroaromatization (MDA) ;  periodic CH4-H-2 switch ;  long-term stability test ;  coke deposition ;  regeneration
刊名: JOURNAL OF ENERGY CHEMISTRY
发表日期: 2015-05-01
DOI: 10.1016/S2095-4956(15)60309-6
卷: 24, 期:3, 页:257-263
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Energy & Fuels ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Engineering
英文摘要: Long-term stability test of Mo/HZSM-5-N catalysts (HZSM-5-N stands for nano-sized HZSM-5) in methane dehydroaromatization (MDA) reaction has been performed with periodic CH4-H-2 switch at 1033-1073 K for more than 1000 h. During this test, methane conversion ranges from 13% to 16%, and mean yield to aromatics (i.e. benzene and naphthalene) exceeds 10%. N-2-physisorption, XRD, NMR and TPO measurements were performed for the used Mo/HZSM-5 catalysts and coke deposition, and the results revealed that the periodic hydrogenation can effectively suppress coke deposition by removing the inert aromatic-type coke, thus ensuring Mo/HZSM-5 partly maintained its activity even in the presence of large amount of coke deposition. The effect of zeolite particle size on the catalytic activity was also explored, and the results showed that the nano-sized zeolite with low diffusion resistance performed better. It is recognized that the size effect was enhanced by reaction time, and it became more remarkable in a long-term MDA reaction even at a low space velocity.
关键词[WOS]: MO/HZSM-5 CATALYST ;  ZEOLITE CATALYSTS ;  1073 K ;  NONOXIDATIVE CONDITIONS ;  DEHYDRO-AROMATIZATION ;  MO/HMCM-22 CATALYSTS ;  DIRECT CONVERSION ;  OPERATION MODE ;  BENZENE ;  DEHYDROCONDENSATION
语种: 英语
WOS记录号: WOS:000355786500001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146298
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, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Guangdong Univ Technol, Dept Chem Engn, Guangzhou 510006, Guangdong, Peoples R China
3.Shaanxi Yanchang Petr Grp Co Ltd, Res Inst, Xian 710075, Shaanxi, Peoples R China

Recommended Citation:
Sun, Changyong,Fang, Guangzong,Guo, Xiaoguang,et al. Methane dehydroaromatization with periodic CH4-H-2 switch: A promising process for aromatics and hydrogen[J]. JOURNAL OF ENERGY CHEMISTRY,2015,24(3):257-263.
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