DICP OpenIR
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
KeywordMethane Aromatization Ammonium Fluoride Hzsm-5 Molybdenum Oxide Supported Catalyst Carbonaceous Deposit
Source PublicationCHINESE JOURNAL OF CATALYSIS
2006-02-01
Volume27Issue:2Pages:166-170
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordSINGLE-PASS CONVERSION ; NONOXIDATIVE CONDITIONS ; DEHYDRO-AROMATIZATION ; CATALYTIC-PROPERTIES ; HZSM-5 ZEOLITE ; ACIDITY
AbstractMo/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.
Language英语
WOS IDWOS:000235990300016
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/140157
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
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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