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Characterization of the acid sites in dealuminated nanosized HZSM-5 zeolite with the probe molecule trimethylphosphine
Zhang, WP; Han, XW; Liu, XM; Bao, XH
KeywordNanosized Hzsm-5 Zeolite Trimethylphosphine (Tmp) Hydrothermal Dealumination P-31 Mas Nmr Lewis Acid Probe Molecule
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2003-03-03
Volume194Issue:1-2Pages:107-113
Indexed BySCI
SubtypeArticle
Department502
Funding Project502
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordSOLID-STATE NMR ; ENHANCED ACTIVITY SITES ; MAS NMR ; MICROPOROUS STRUCTURE ; CATALYTIC PROPERTIES ; SURFACE-ACIDITY ; ZSM-5 ZEOLITES ; LEWIS SITES ; P-31 NMR ; H-Y
AbstractThe acid sites in dealuminated HZSM-5 zeolite with crystal sizes down to the nanoscale were firstly characterized by the probe molecule trimethylphosphine (TMP). As evidenced by the combination of P-31 CP/MAS NMR, Al-27 MAS and H-1 --> Al-27 CP/MAS NMR measurements, the Bronsted acid sites of both microsized and nanosized HZSM-5 could be decreased upon the dealumination of zeolitic framework after hydrothermal treatment. At the same time, the appearance of Lewis acid sites was observed. The dealuminated nanosized HZSM-5 is easier to form Lewis acid sites than microsized HZSM-5, and the type of Lewis acid sites in nanosized HSM-5 is more than one. In addition, the origin of Lewis acid sites is mainly associated with the aluminum at ca. 30 ppm, in the Al-27 MAS NMR spectra, and only a part of which in the dealuminated HZSM-5 zeolite acts as Lewis acid sites. (C) 2002 Elsevier Science B.V. All rights reserved.
Language英语
URL查看原文
WOS IDWOS:000181555200012
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/82883
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
Zhang, WP,Han, XW,Liu, XM,et al. Characterization of the acid sites in dealuminated nanosized HZSM-5 zeolite with the probe molecule trimethylphosphine[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2003,194(1-2):107-113.
APA Zhang, WP,Han, XW,Liu, XM,&Bao, XH.(2003).Characterization of the acid sites in dealuminated nanosized HZSM-5 zeolite with the probe molecule trimethylphosphine.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,194(1-2),107-113.
MLA Zhang, WP,et al."Characterization of the acid sites in dealuminated nanosized HZSM-5 zeolite with the probe molecule trimethylphosphine".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 194.1-2(2003):107-113.
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