Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons

Handle URI:
http://hdl.handle.net/10754/622446
Title:
Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons
Authors:
Liu, Zhaohui; Dong, Xinglong ( 0000-0001-6478-8819 ) ; Liu, Xin; Han, Yu ( 0000-0003-1462-1118 )
Abstract:
Zeolites are the most commonly used catalysts for methanol-to-hydrocarbon (MTH) conversion. Here, we identified two oxygen-containing compounds as coke species in zeolite catalysts after MTH reactions. We investigated the possible influences of the oxygen-containing compounds on coke formation, catalyst deactivation, product selectivity, and the induction period of the MTH reaction through a series of controlled experiments in which one of the identified compounds (2,3-dimethyl-2-cyclopenten-1-one) was co-fed with methanol over a zeolite H-ZSM-5 catalyst. Our results allow us to infer that once produced, the oxygen-containing compounds block the Brønsted acid sites by strong chemisorption and their rapid conversion to aromatics expedites the formation of coke and thus the deactivation of the catalyst. A minor effect of the production of such compounds during the MTH reaction is that the aromatic-based catalytic cycle can be slightly promoted to give higher selectivity to ethylene.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Liu Z, Dong X, Liu X, Han Y (2016) Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons. Catal Sci Technol 6: 8157–8165. Available: http://dx.doi.org/10.1039/c6cy01463a.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Catal. Sci. Technol.
KAUST Grant Number:
FCC/1/1972-09-01
Issue Date:
6-Oct-2016
DOI:
10.1039/c6cy01463a
Type:
Article
ISSN:
2044-4753; 2044-4761
Sponsors:
This work was supported by King Abdullah University of Science and Technology's (KAUST) Office of Competitive Research Funds (OCRF) under Awards No. FCC/1/1972-09-01.
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2016/CY/C6CY01463A
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLiu, Zhaohuien
dc.contributor.authorDong, Xinglongen
dc.contributor.authorLiu, Xinen
dc.contributor.authorHan, Yuen
dc.date.accessioned2017-01-02T09:28:31Z-
dc.date.available2017-01-02T09:28:31Z-
dc.date.issued2016-10-06en
dc.identifier.citationLiu Z, Dong X, Liu X, Han Y (2016) Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons. Catal Sci Technol 6: 8157–8165. Available: http://dx.doi.org/10.1039/c6cy01463a.en
dc.identifier.issn2044-4753en
dc.identifier.issn2044-4761en
dc.identifier.doi10.1039/c6cy01463aen
dc.identifier.urihttp://hdl.handle.net/10754/622446-
dc.description.abstractZeolites are the most commonly used catalysts for methanol-to-hydrocarbon (MTH) conversion. Here, we identified two oxygen-containing compounds as coke species in zeolite catalysts after MTH reactions. We investigated the possible influences of the oxygen-containing compounds on coke formation, catalyst deactivation, product selectivity, and the induction period of the MTH reaction through a series of controlled experiments in which one of the identified compounds (2,3-dimethyl-2-cyclopenten-1-one) was co-fed with methanol over a zeolite H-ZSM-5 catalyst. Our results allow us to infer that once produced, the oxygen-containing compounds block the Brønsted acid sites by strong chemisorption and their rapid conversion to aromatics expedites the formation of coke and thus the deactivation of the catalyst. A minor effect of the production of such compounds during the MTH reaction is that the aromatic-based catalytic cycle can be slightly promoted to give higher selectivity to ethylene.en
dc.description.sponsorshipThis work was supported by King Abdullah University of Science and Technology's (KAUST) Office of Competitive Research Funds (OCRF) under Awards No. FCC/1/1972-09-01.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2016/CY/C6CY01463Aen
dc.titleOxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbonsen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalCatal. Sci. Technol.en
dc.contributor.institutionSchool of Chemistry, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, PR Chinaen
kaust.authorLiu, Zhaohuien
kaust.authorDong, Xinglongen
kaust.authorHan, Yuen
kaust.grant.numberFCC/1/1972-09-01en
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