Comparative study of methanol and dimethyl ether conversions to light olefins over a Mg–HZSM-5/Al2O3 catalyst in nitrogen and syngas atmospheresстатья
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Дата последнего поиска статьи во внешних источниках: 4 марта 2026 г.
Аннотация:At low temperatures (300–320 °C), on a Mg–HZSM-5/Al2O3 catalyst, dimethyl ether provides a higher yield of light olefins than methanol, but its conversion is strongly suppressed in a syngas atmosphere compared with an inert nitrogen environment. In situ diffuse reflectance infrared Fourier transform spectroscopy revealed that this suppression is attributed to CO-induced carbonylation side reactions resulting in the formation of methyl acetate and acetic acid depleting Brønsted acid sites. Efficient olefin production requires temperatures above 350 °C to mitigate the carbonylation inhibition