Dehydrocyclization of n-Paraffins Over Te-NaX Zeolite Catalysts Full article
Conference |
7th International Congress on Catalysis 30 Jun - 4 Jul 1980 , Tokyo |
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Source | New Horizons in Catalysis: Proceedings of the 7th International Congress on Catalysis, Tokyo, 30 June-4 July 1980 Compilation, Elsevier North-Holland. 1981. 1537 c. ISBN 9780444997401. |
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Journal |
Studies in Surface Science and Catalysis
ISSN: 0167-2991 |
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Output data | Year: 1981, Volume: 7, Pages: 708-723 Pages count : 16 DOI: 10.1016/S0167-2991(09)60310-4 | ||||||
Authors |
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Affiliations |
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Funding (3)
1 | National Science Foundation | |
2 | Welch Foundation | |
3 | ConocoPhillips (United States) |
Abstract:
Both 14C and deuterium tracers have been used to establish the reaction pathways and rate limiting steps in the formation of aromatics from n-paraffins and cycloparaffins over a shape-selective tellurium zeolite catalyst. The catalyst functions mainly as a dehydrogenation agent with linear mono-olefins and higher olefins being exclusive gas phase intermediates. Cyclization is likely a non-catalytic step involving ring closure of a linear hexatriene unit, followed by catalytic dehydrogenation of the cyclohexadiene nucleus to an aromatic. Alkyl cyclohexanes definitely are not intermediates in the aromatization of n-paraffins, although by themselves they can be dehydrogenated to aromatics in high yields over this catalyst. The absence of extensive H-D scrambling and the presence of a large primary kinetic isotope effect (kH/kD >2 at 400°C) when deuterated hydrocarbons are reacted simultaneously with similar undeuterated molecules strongly suggests that the slow step in the reaction is cleavage of one or more C-H bonds.
Cite:
Price G.L.
, Ismagilov Z.R.
, Hightower J.W.
Dehydrocyclization of n-Paraffins Over Te-NaX Zeolite Catalysts
In compilation New Horizons in Catalysis: Proceedings of the 7th International Congress on Catalysis, Tokyo, 30 June-4 July 1980. – Elsevier North-Holland., 1981. – C.708-723. – ISBN 9780444997401. DOI: 10.1016/S0167-2991(09)60310-4 Scopus РИНЦ
Dehydrocyclization of n-Paraffins Over Te-NaX Zeolite Catalysts
In compilation New Horizons in Catalysis: Proceedings of the 7th International Congress on Catalysis, Tokyo, 30 June-4 July 1980. – Elsevier North-Holland., 1981. – C.708-723. – ISBN 9780444997401. DOI: 10.1016/S0167-2991(09)60310-4 Scopus РИНЦ
Dates:
Published print: | Jan 1, 1981 |
Published online: | Jan 6, 2009 |
Identifiers:
Scopus | 2-s2.0-77956958078 |
Elibrary | 30952308 |
Chemical Abstracts | 1981:586374 |
Chemical Abstracts (print) | 95:186374 |
OpenAlex | W165778777 |