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Dehydroaromatization of methane over Mo/HZSM-5 pretreated with NH4F: Further study on effect of pretreatment temperature
Li, YG; Huang, XM; Liu, L; Liu, XM; Shen, WJ; Bao, XH; Xu, YD
关键词Methane Aromatization Ammonium Fluoride Hzsm-5 Molybdenum Oxide Supported Catalyst Carbonaceous Deposit
刊名CHINESE JOURNAL OF CATALYSIS
2006-02-01
27期:2页:166-170
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
关键词[WOS]SINGLE-PASS CONVERSION ; NONOXIDATIVE CONDITIONS ; DEHYDRO-AROMATIZATION ; CATALYTIC-PROPERTIES ; HZSM-5 ZEOLITE ; ACIDITY
英文摘要Mo/HZSM-5 was prepared from HZSM-5 zeolite that was pretreated with NH4F at different temperatures. The results of Al-27 magic angle spinning (MAS) NMR show that the pretreatment with NH4F at 623 K causes serious dealumination on HZSM-5, forming a new wide peak at around delta = - 12.7, which is attributed to AlO6-xFx species. An enhanced interaction between MoO3 and HZSM-5 is confirmed by NH3 temperature-programmed desorption and Al-27 MAS NMR characterization for Mo/HZSM-5 samples, and this interaction becomes more obvious when the pretreatment was carried out at a higher temperature. The coked Mo/HZSM-5 samples prepared with NH4F-pretreated HZSM-5 were characterized by thermogravimetry and temperature-programmed oxidation, and the results show that the NH4F pretreatment improves the catalyst resistance to the coke formation. This is related not only to the decrease in Bronsted acid sites on Mo/HZSM-5, but also to the compatibility of the amounts of Bronsted acid sites and the active molybdenum species.
语种英语
WOS记录号WOS:000235990300016
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140157
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
Li, YG,Huang, XM,Liu, L,et al. Dehydroaromatization of methane over Mo/HZSM-5 pretreated with NH4F: Further study on effect of pretreatment temperature[J]. CHINESE JOURNAL OF CATALYSIS,2006,27(2):166-170.
APA Li, YG.,Huang, XM.,Liu, L.,Liu, XM.,Shen, WJ.,...&Xu, YD.(2006).Dehydroaromatization of methane over Mo/HZSM-5 pretreated with NH4F: Further study on effect of pretreatment temperature.CHINESE JOURNAL OF CATALYSIS,27(2),166-170.
MLA Li, YG,et al."Dehydroaromatization of methane over Mo/HZSM-5 pretreated with NH4F: Further study on effect of pretreatment temperature".CHINESE JOURNAL OF CATALYSIS 27.2(2006):166-170.
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