Tellurium NaX Zeolites. I. Deuterium Tracer Studies of Cyclohexane Dehydrogenation to Benzene Научная публикация
Журнал |
Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694 |
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Вых. Данные | Год: 1982, Том: 73, Номер: 2, Страницы: 361-365 Страниц : 5 DOI: 10.1016/0021-9517(82)90108-7 | ||
Авторы |
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Организации |
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Информация о финансировании (4)
1 | National Science Foundation | CHE-77-10541 |
2 | National Science Foundation | GP-39482 |
3 | Welch Foundation | |
4 | ConocoPhillips (United States) |
Реферат:
Deuterium tracers were used to explore the mechanisms of dehydrogenation of six-membered cyclic compounds to benzene over a Te NaX zeolite catalyst. Dehydrogenation of cyclohexane to cyclohexene (and probably to cyclohexadiene) precedes the formation of benzene. A large primary kinetic isotope effect (kc6H12kc6D12 ~ 2,5 at 4000C) indicates that cleavage of the C-H bonds in cyclohexane is the rate-determining reaction step. Although the presence of gaseous hydrogen is required to maintain catalyst activity, the dehydrogenation rates are the same in H2 as they are in D2. Only a limited amount of exchange occurs between D2 and H atoms in the hydrocarbons. The exchange which is observed probably arises from double bond shift that occurs in the olefins by an addition/abstraction mechanism on a single Te atom containing one adsorbed D atom. Cyclohexane can be formed from cyclohexene by hydrogen transfer from another cyclohexene molecule much more readily than it can be formed by direct saturation with gaseous H2. Both the dehydrogenation and isomerization sites are probably Te0 surface atoms.
Библиографическая ссылка:
Price G.L.
, Ismagilov Z.R.
, Hightower J.W.
Tellurium NaX Zeolites. I. Deuterium Tracer Studies of Cyclohexane Dehydrogenation to Benzene
Journal of Catalysis. 1982. V.73. N2. P.361-365. DOI: 10.1016/0021-9517(82)90108-7 WOS Scopus РИНЦ
Tellurium NaX Zeolites. I. Deuterium Tracer Studies of Cyclohexane Dehydrogenation to Benzene
Journal of Catalysis. 1982. V.73. N2. P.361-365. DOI: 10.1016/0021-9517(82)90108-7 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 27 июл. 1981 г. |
Принята к публикации: | 5 окт. 1981 г. |
Опубликована в печати: | 1 февр. 1982 г. |
Опубликована online: | 24 мая 2004 г. |
Идентификаторы БД:
Web of science | WOS:A1982NF14400014 |
Scopus | 2-s2.0-0000869483 |
РИНЦ | 23712253 |
Chemical Abstracts | 1982:217001 |
Chemical Abstracts (print) | 96:217001 |
OpenAlex | W2002945292 |