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题名: Effect of Co additive on the formation of carbon deposit on Mo/MCM-22 catalyst for methane dehydro-aromatization
作者: Liu, HM;  Shen, WJ;  Bao, XH;  Xu, YD
关键词: cobalt ;  molybdenum ;  MCM-22 zeolite ;  methane ;  dehydro-aromatization ;  carbon deposit
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2004-06-01
卷: 25, 期:6, 页:495-500
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 ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Methane dehydro-aromatization (MDA) under non-oxidative conditions was carried out over the Mo/ MCM-22 catalyst modified by Co additive, and the results suggested that the addition of Co dramatically improved the activity and stability of Mo/MCM-22. Moreover, the chemical nature and physical properties of the carbon deposit formed on Mo/MCM-22 and Co-Mo/MCM-22 catalysts were studied by temperature-programmed reaction with hydrogen (TPH) and temperature-programmed reaction with CO2 (TPCO2) combining with thermal gravimetric analysis (TGA). The results showed that there were two kinds of carbon deposit formed on the surface of the catalysts during MDA. TPH experiment only had effect on the carbon deposit burnt-off at high temperature. However, TPCO2 experiment could result in diminishing of the carbon deposit burnt-off at both low temperature and high temperature. The formation of the two kinds of carbon deposit was distinctly suppressed on the Co-modified Mo/MCM-22 catalyst, which directly led to the obvious increase of the stability of the Mo/MCM-22 catalyst in MDA.
关键词[WOS]: NONOXIDATIVE CONDITIONS ;  MO/HZSM-5 CATALYST ;  INDUCTION PERIOD ;  CONVERSION ;  BENZENE ;  ABSENCE
语种: 英语
WOS记录号: WOS:000222531200016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139335
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:
Liu, HM,Shen, WJ,Bao, XH,et al. Effect of Co additive on the formation of carbon deposit on Mo/MCM-22 catalyst for methane dehydro-aromatization[J]. CHINESE JOURNAL OF CATALYSIS,2004,25(6):495-500.
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