Реферат: Under slurry reactor conditions, the products of condensation are generrally formed on strong Mg/HZSM-5 acid sites independently of the SiO2/Al2O3 molar ratio in the zeolite. The composition of condensation products remains virtually unchanged as the molar ratio grows and basically consists of trimethyl and tetramethyl benzenes, but their content falls as the volume of mesopores grows with increasing SiO2/Al2O3. This lowers the hindrances to diffusion and the contribution from secondary reactions to improve the removal of coke precursors from the zeolite’s surface and favorably affect the catalyst’s activity (DME conversion doubles). The composition of reaction products changes slightly with an increase in the SiO2/Al2O3 molar ratio, and the total selectivity toward lower olefins is ~70 wt %. A rapid loss in Mg/HZSM-5 activity upon extending the period of operation under slurry reactor conditions is not due to coking, but to the catalyst being clogged by dispersion medium (polydimethylsiloxane) decomposition products.

Библиографическая ссылка: Stashenko A.N. , Batova T.I. , Obukhova T.K. , Kolesnichenko N.V.
Deactivation of Mg/HZSM-5 Catalysts for the Synthesis of Lower Olefins from Dimethyl Ether in a Slurry Reactor
Catalysis in Industry. 2024. V.16. N1. P.7–13. DOI: 10.1134/S2070050424010094 WOS Scopus РИНЦ OpenAlex

Оригинальная версия: Сташенко А.Н. , Батова Т.И. , Обухова Т.К. , Колесниченко Н.В.
Особенности дезактивации катализаторов Mg/HZSM-5 синтеза низших олефинов из диметилового эфира в сларри-реакторе
Катализ в промышленности. 2023. №3. С.24-31. DOI: 10.18412/1816-0387-2023-3-24-31 РИНЦ CAPlus OpenAlex

Даты:

Поступила в редакцию:	27 дек. 2022 г.
Принята к публикации:	6 мар. 2023 г.
Опубликована в печати:	1 мар. 2024 г.

Идентификаторы БД:

Web of science:	WOS:001221716600008
Scopus:	2-s2.0-85192880512
РИНЦ:	67307283
OpenAlex:	W4396852724

Альметрики: