DICP OpenIR
Investigating the Coke Formation Mechanism of H-ZSM-5 during Methanol Dehydration Using Operando UV-Raman Spectroscopy
An, Hongyu1,2; Zhang, Fei1,2; Guan, Zaihong3; Liu, Xuebin3; Fan, Fengtao1; Li, Can1
Corresponding AuthorFan, Fengtao(ftfan@dicp.ac.cn) ; Li, Can(canli@dicp.ac.cn)
Keywordoperando Raman spectroscopy coke H-ZSM-5 methanol dehydration
Source PublicationACS CATALYSIS
2018-10-01
ISSN2155-5435
DOI10.1021/acscatal.8b00928
Volume8Issue:10Pages:9207-9215
Funding ProjectNational Natural Science Foundation of China[21373212] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06040400] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB17020000] ; DMTO project of the Dalian Institute of Chemical Physics[DICP DMTO201407]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordPOLYCYCLIC AROMATIC-HYDROCARBONS ; TO-OLEFINS CONVERSION ; ZEOLITE H-MFI ; DIMETHYL ETHER ; CATALYST DEACTIVATION ; ZEOTYPE CATALYSTS ; ACID CATALYSTS ; MTH REACTION ; HZSM-5 ; ZSM-5
AbstractMethanol dehydration on solid acid catalysts is a fundamental step in many industrial chemical processes, such as methanol to dimethyl ether (MTD) and methanol to olefin (MTO). The performance of catalysts often encounters the detrimental effect of coke deposition. However, the heterogeneous distribution of feedstock and product in a fixed-bed reactor usually brings in difficulties in the study of the coking mechanism. In this work, the coking progress of H-ZSM-5 in a fixed-bed reactor under MTD conditions is investigated using operando UV-Raman spectroscopy. Methylbenzenium carbenium ions (MB+), a key precursor for coke formation, was identified by UV resonance Raman spectroscopy and isotope exchange experiments. At higher temperature (473 K), MB+ rapidly transforms into "hard coke" at the beginning of the catalyst bed. The relative intensity of the 1605 cm(-1) peak can serve as an indicator for the catalyst deactivation. Moreover, water formed during MTD can suppress the transformation of MB+ into "hard coke" at the later parts of the bed. These results provide important information for the key steps and intermediates about coke formation on solid acid catalysts during methanol conversion, and the findings will contribute to improved catalytic performance in the related catalytic reaction.
Language英语
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; DMTO project of the Dalian Institute of Chemical Physics ; DMTO project of the Dalian Institute of Chemical Physics
WOS IDWOS:000447224100024
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/166827
Collection中国科学院大连化学物理研究所
Corresponding AuthorFan, Fengtao; Li, Can
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat iChEM, State Key Lab Catalysis,Dalian Natl Lab Clean Ene, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.BP Dalian Branch, Energy Innovat Lab, Dalian, Peoples R China
Recommended Citation
GB/T 7714
An, Hongyu,Zhang, Fei,Guan, Zaihong,et al. Investigating the Coke Formation Mechanism of H-ZSM-5 during Methanol Dehydration Using Operando UV-Raman Spectroscopy[J]. ACS CATALYSIS,2018,8(10):9207-9215.
APA An, Hongyu,Zhang, Fei,Guan, Zaihong,Liu, Xuebin,Fan, Fengtao,&Li, Can.(2018).Investigating the Coke Formation Mechanism of H-ZSM-5 during Methanol Dehydration Using Operando UV-Raman Spectroscopy.ACS CATALYSIS,8(10),9207-9215.
MLA An, Hongyu,et al."Investigating the Coke Formation Mechanism of H-ZSM-5 during Methanol Dehydration Using Operando UV-Raman Spectroscopy".ACS CATALYSIS 8.10(2018):9207-9215.
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