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In situ DRIFT study of dimethyl ether carbonylation to methyl acetate on H-mordenite
Zhou, Hui1,2,3; Zhu, Wenliang1,2; Shi, Lei1,2; Liu, Hongchao1,2; Liu, Shiping1,2,3; Ni, Youming1,2; Liu, Yong1,2; He, Yanli1,2; Xu, Shuliang1,2; Li, Lina1,2,3; Liu, Zhongmin1,2
KeywordIn Situ Drift Dimethyl Ether Methyl Acetate Carbonylation Mordenite
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2016-06-01
ISSN1381-1169
DOI10.1016/j.molcata.2016.02.032
Volume417Pages:1-9
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordSELECTIVE CATALYTIC-REDUCTION ; ACIDIC ZEOLITES ; ETHANOL ; METHANOL ; ADSORPTION ; MECHANISM ; SYNGAS ; NH3 ; NOX ; CO
AbstractIn situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was used to study the reaction of dimethyl ether (DME) carbonylation to methyl acetate (MAc). Methoxyl and acetyl groups were observed in situ, confirming the reaction mechanistic proposal. DME adsorption bands on Si-OH, Al-OH and SiOHA1(Bronsted acid sites) groups were identified respectively. The effect of temperature and pressure on acetyl formation and side reactions were systematically studied. It was found that methoxyls formed by DME chemisorbed on Brensted acid sites could be observed above 433 K. High pressure and appropriate temperature interval promoted the formation of acetyls. Side reactions, DME transformed into olefins and then into cokes, were favored at low pressure and high temperature. Carbonylation reactions on catalysts with acid sites only in 8MR side pockets and 12MR main channels of mordenite (samples noted as HMOR-SP and HMOR-MC) were conducted by in situ DRIFT spectroscopy and catalytic testing. Pyridine molecules adsorbed in 12MR main channels resulted in the low utilization of acid sites in 8MR side pockets. The synthesis rate of MAc on HMOR-SP was stable but lower. HMOR-MC presented the lowest MAc synthesis rate with the production of coke, which was also observed in DRIFT spectra. (C) 2016 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000374626200001
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/170777
Collection中国科学院大连化学物理研究所
Corresponding AuthorLiu, Zhongmin
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab Methanol Olefins, POB 110, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Hui,Zhu, Wenliang,Shi, Lei,et al. In situ DRIFT study of dimethyl ether carbonylation to methyl acetate on H-mordenite[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2016,417:1-9.
APA Zhou, Hui.,Zhu, Wenliang.,Shi, Lei.,Liu, Hongchao.,Liu, Shiping.,...&Liu, Zhongmin.(2016).In situ DRIFT study of dimethyl ether carbonylation to methyl acetate on H-mordenite.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,417,1-9.
MLA Zhou, Hui,et al."In situ DRIFT study of dimethyl ether carbonylation to methyl acetate on H-mordenite".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 417(2016):1-9.
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