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Methane dehydroaromatization under nonoxidative conditions over Mo/HZSM-5 catalysts: Identification and preparation of the Mo active species
Liu, HM; Bao, XH; Xu, YD; Xu YD(徐奕德); Xu YD(徐奕德)
KeywordMethane Aromatization Zsm-5 Molybdenum Reduction
Source PublicationJOURNAL OF CATALYSIS
2006-04-25
DOI10.1016/j.jcat.2006.02.018
Volume239Issue:2Pages:441-450
Indexed BySCI
SubtypeArticle
Department5
Funding Project501,502
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordELECTRON-PARAMAGNETIC RESONANCE ; RAY PHOTOELECTRON-SPECTROSCOPY ; ION ZSM-5 ZEOLITES ; DEHYDRO-AROMATIZATION ; SUPPORTED MOLYBDENUM ; CARBONACEOUS DEPOSITS ; HZSM-5 ZEOLITE ; CONVERSION ; BENZENE ; DEHYDROGENATION
AbstractComplete reduction of Mo species interacting strongly with a HZSM-5 zeolite support in methane is difficult. and the reduction product, MoCxOy, is a key active species in methane dehydroaromatization (MDA) under nonoxidative conditions. Pretreatment in H-2 at 623 K could lead to topotactic transformation of the Mo species from hexagonally close packing (hcp) to face-centered cubic (fee) structures; the fee MoCxOy species are more active and more stable than the hcp MoCxOy in MDA. After initial H-2 pretreatment at 623 K, followed by a CH4-treatment, the Mo species on a MoO3/HZSM-5 catalyst prepared by mechanical mixing was reduced and carburized to form fee alpha-MoC1-x species on the extra Surface of the zeolite. Methane molecules activated by the alpha-MoC1-x were converted mainly into carbon deposits instead of benzene. Both the most active Mo species and the neighboring Bronsted acid sites are essential in obtaining a perfect catalyst in the reaction of MDA. (c) 2006 Elsevier Inc. All rights reserved.
Language英语
URL查看原文
WOS IDWOS:000236890200021
Citation statistics
Cited Times:72[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/93749
Collection中国科学院大连化学物理研究所
Corresponding AuthorXu YD(徐奕德); Xu YD(徐奕德)
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Tsing Hua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
Recommended Citation
GB/T 7714
Liu, HM,Bao, XH,Xu, YD,et al. Methane dehydroaromatization under nonoxidative conditions over Mo/HZSM-5 catalysts: Identification and preparation of the Mo active species[J]. JOURNAL OF CATALYSIS,2006,239(2):441-450.
APA Liu, HM,Bao, XH,Xu, YD,徐奕德,&徐奕德.(2006).Methane dehydroaromatization under nonoxidative conditions over Mo/HZSM-5 catalysts: Identification and preparation of the Mo active species.JOURNAL OF CATALYSIS,239(2),441-450.
MLA Liu, HM,et al."Methane dehydroaromatization under nonoxidative conditions over Mo/HZSM-5 catalysts: Identification and preparation of the Mo active species".JOURNAL OF CATALYSIS 239.2(2006):441-450.
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