Size Effects in Ethylene Oxidation on Silver Catalysts: Influence of Support and Cs Promoter Научная публикация
Журнал |
Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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Вых. Данные | Год: 1995, Том: 126, Номер: 1, Страницы: 67-84 Страниц : 18 DOI: 10.1016/0926-860X(95)00036-4 | ||
Ключевые слова | Ethylene epoxidation, Ethylene π-complex, Silver catalyst, Silver particle size distribution, Size effect | ||
Авторы |
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Организации |
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Реферат:
A new method for preparing supported silver catalysts with a narrow particle size distribution has been developed. For crystals with a diameter ranging from 100 to 1000 Å the dependencies of reaction rates on size have been studied for epoxidation and deep oxidation of ethylene. For particles 300–500 Å in size the reaction rate was found to increase sharply. The concentration of ethylene π-complexes with Ag+ cations increased proportionally to the reaction rate. These π-complexes are assumed to be the only intermediates directing the reaction towards epoxidation. The ratio of the reaction rate to the concentration of π-complexes was found to remain constant within a wide range of Ag crystal sizes including bulk silver samples. The influence of the support (α-Al2O3, SiO2) on the size effect relates to the secondary processes of ethylene oxide conversion. The factors that cause the catalytic size effect and the promoting effect of Cs are discussed.
Библиографическая ссылка:
Goncharova S.N.
, Paukshtis E.A.
, Bal'zhinimaev B.S.
Size Effects in Ethylene Oxidation on Silver Catalysts: Influence of Support and Cs Promoter
Applied Catalysis A: General. 1995. V.126. N1. P.67-84. DOI: 10.1016/0926-860X(95)00036-4 WOS Scopus РИНЦ
Size Effects in Ethylene Oxidation on Silver Catalysts: Influence of Support and Cs Promoter
Applied Catalysis A: General. 1995. V.126. N1. P.67-84. DOI: 10.1016/0926-860X(95)00036-4 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 13 мая 1994 г. |
Принята к публикации: | 6 февр. 1995 г. |
Опубликована в печати: | 25 мая 1995 г. |
Опубликована online: | 18 нояб. 1999 г. |
Идентификаторы БД:
Web of science | WOS:A1995RC96300005 |
Scopus | 2-s2.0-0029306773 |
РИНЦ | 31575364 |
Chemical Abstracts | 1995:569031 |
Chemical Abstracts (print) | 123:32505 |
OpenAlex | W2050581614 |