Oxygen-containing coke species in zeolite-catalyzed conversion of methanol to hydrocarbons
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Chemical Science Program
KAUST Catalysis Center (KCC)
Nanostructured Functional Materials (NFM) laboratory
Physical Science and Engineering (PSE) Division
KAUST Grant NumberFCC/1/1972-09-01
Permanent link to this recordhttp://hdl.handle.net/10754/622446
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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.