Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Physical Sciences and Engineering (PSE) Division
KAUST Catalysis Center (KCC)
KAUST Grant NumberFCC/1/1972-09-01
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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.
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.
SponsorsThis 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.
PublisherRoyal Society of Chemistry (RSC)
JournalCatal. Sci. Technol.