Effect of sodium loading on Pt/ZrO2 during ethanol steam reforming

نویسندگان

چکیده

Ethanol steam reforming (ESR) was investigated on unpromoted and several sodium promoted Pt/ZrO2 catalysts. From DRIFTS experiments, the following steps during ESR were inferred: dissociation of ethanol to produce ethoxy species; oxidative dehydrogenation species acetate; acetate decomposition. Acetate decomposition depends catalyst formulation. Decarboxylation is most favored route at high loading (2.5 5 wt.%); decomposes in forward direction CH4 a carbonate, which further CO2. In contrast, decarbonylation prevalent for or catalysts having low loading. likely CH3OH CO. Adsorbed methanol may undergo by formate species, decarbonylates via reverse CO H2O. Temperature programmed desorption/reaction activity data confirmed that alkali promotion, especially 1.8 %Na higher loading, facilitates step, favoring decarboxylation over decarbonylation.

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ژورنال

عنوان ژورنال: Applied Catalysis A-general

سال: 2021

ISSN: ['0926-860X', '1873-3875']

DOI: https://doi.org/10.1016/j.apcata.2020.117947