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Conversion of dimethyl ether to liquid hydrocarbons over Zn-isomorphously substituted HZSM-5статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Vosmerikova L.N., Matieva Z.M., Snatenkova Yu M., Kolesnichenko N.V., Zaikovskii V.I., Vosmerikov A.V.
- Журнал: Fuel
- Номер: 320
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 123959
- DOI: 10.1016/j.fuel.2022.123959
- Аннотация: Zinc-isomorphously substituted HZSM-5 (Zn-HZSM-5(iso)) surpasses Zn-HZSM-5(i.e) sample obtained by ion exchange in its catalytic performance in the conversion of mixture of DME + synthesis gas (in different compositions) to liquid hydrocarbons. The uniform distribution of highly dispersed zinc species over zeolite crystals provides high selectivity of Zn-HZSM-5(iso) to liquid hydrocarbons (90 wt%). New ZnOH+–active sites of medium strength with mild hydrogenation properties explain the low yield of arenes (4.7 wt%) and the high yield of i-alkanes (72.5 wt%). The absence of methanol in the product stream indicates its dehydration to DME, which is known to have a higher reactivity, or its participation in the methylation of alkenes to form methyl-substituted alkanes. A larger mesopores volume in ZnHZSM-5(iso) promotes a lower degree of coke precursors polycondensation. Therefore, this allows the use of mild oxidative regeneration conditions. The Zn-НZSM-5(iso) catalyst retains its efficient and stable operation for 72 h with a high conversion of DME and high selectivity for liquid hydrocarbons. The resulting hydrocarbon mixture can be used as a base component for environmentally friendly fuels.
- Добавил в систему: Матиева Зарета Муратовна