Acetone reaction pathways as a model bio-oxygenate in a hydrocarbon medium on zeolite Y and ZSM-5 catalysts: Isotope labeling studyстатья
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Дата последнего поиска статьи во внешних источниках: 11 мая 2022 г.
Аннотация:In this research the isotope labeling experiments were used to study the reaction pathways of acetone conversionin hydrocarbon medium in the presence Y and ZSM-5 zeolites. Acetone is a model for ketones, which are aconsiderable fraction of bio-oil. The analysis of the isotope distribution in the conversion products was carriedout by 1H NMR and GC/MS methods; it was shown that the deuterium labels introduced with acetone aredistributed mainly in C3-C4 olefins, as well as pentenes and 2-methylpentane. The results obtained correspondwith the previously proposed assumption that the catalytic cracking of ketones, capable to transform into enols,in a hydrocarbon medium starts with a nucleophilic attack of the protonated ketone on hydrocarbon intermediates.Additionally, the H/D exchange between deuterated compounds and cracking intermediates orzeolite has been established.