Реферат: Rhenium containing catalysts are prepared on the basis of high-silica zeolite of pentasil family with a silicate modulus 40. Modification of the zeolite with rhenium introduced using various methods results in the changes in its structural characteristics: a decrease in specific surface area, pore volume and diameter. The most noticeable decrease in these parameters is observed when impregnation and ion exchange are used. The use of rhenium-containing zeolite catalysts for upgrading the straight-run gasoline fraction of oil allows increasing the yield of liquid products - high-octane gasolines characterised by a low content of aromatic hydrocarbons and a high octane number. A decrease in the aromatizing activity of Re-containing catalysts contributes not only to improvements in the environmental characteristics of resulting gasolines but also into an increase in the time of the stable operation of catalysts. Due to an increase in the rate of hydrogenation, the introduction of rhenium significantly reduces the amount of coke deposits formed on the catalysts under study during the process. According to the rate of formation of coke deposits, Re/MFI catalysts prepared using different methods are ranked as follows: ion exchange < ultrafine powder < impregnation < mixing with salt < MFI. Carbon densification products formed on rhenium-containing catalysts are less condensed and more homogeneous than coke obtained on unmodified zeolites. According to the degree of decrease in catalytic activity or aromatizing ability during the same time of operation, the catalysts under study may be ranked as follows: MFI > Re/MFI (ion exchange) > Re/MFI (ultrafine powder) > Re/MFI (impregnation) > Re/MFI (mixing with salt).

Библиографическая ссылка: Velichkina L.M. , Barbashin Y.E. , Vosmerikov A.V.
Effect of Rhenium on the Physicochemical Properties of MFI-type Zeolite and the Dynamics of its Deactivation in the Course of Upgrading the Straight-Run Gasoline Fraction of Oil
Chemistry for Sustainable Development. 2020. V.28. N3. P.219-225. DOI: 10.15372/csd2020223 WOS РИНЦ OpenAlex

Оригинальная версия: Величкина Л.М. , Барбашин Я.Е. , Восмериков А.В.
Влияние рения на физико-химические свойства цеолита типа MFI и динамику его дезактивации в процессе облагораживания прямогонной бензиновой фракции нефти
Химия в интересах устойчивого развития. 2020. Т.28. №3. С.229-235. DOI: 10.15372/khur2020223 РИНЦ CAPlus OpenAlex

Даты:

Опубликована online:

21 дек. 2024 г.

Идентификаторы БД:

Web of science:	WOS:000612318900002
РИНЦ:	75538439
OpenAlex:	W4235295116

Цитирование в БД:

БД	Цитирований
OpenAlex	1
Web of science	3

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