Zn-Promoted Hydrogen Exchange for Methane and Ethane on Zn/H-BEA Zeolite: In situ 1H MAS NMR Kinetic Study | Sciact - CRIS-system of Boreskov Institute of Catalysis

Zn-Promoted Hydrogen Exchange for Methane and Ethane on Zn/H-BEA Zeolite: In situ 1H MAS NMR Kinetic Study Full article

Journal

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Output data

Year: 2008, Volume: 253, Number: 1, Pages: 11-21 Pages count : 11 DOI: 10.1016/j.jcat.2007.11.002

Tags

1H MAS NMR spectroscopy, Ethane, H/D exchange, Kinetics, Methane, Promoting effect, Zn/H-BEA zeolite

Authors

Stepanov Alexander G. ¹ , Arzumanov Sergei S. ¹ , Gabrienko Anton A. ² , Toktarev Alexander V. ¹ , Parmon Valentin N. ¹ , Freude Dieter ³

Affiliations

1	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2	Department of Natural Sciences, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia
3	Universität Leipzig, Abteilung Grenzflächenphysik, Linnéstraße 5, 04103 Leipzig, Germany

Funding (3)

1	Russian Foundation for Basic Research	07-03-00136
2	German Research Foundation	FR 902/15
3	International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union	03-51-5286

Hydrogen (H/D) exchange between Brønsted acid sites of both the acidic form of zeolite beta (H-BEA) and Zn-loaded zeolite beta (Zn/H-BEA) and small alkanes (methane and ethane) has been studied by monitoring the kinetics of the exchange in situ with 1H MAS NMR spectroscopy within the temperature range of 433–563 K. On Zn/H-BEA, the exchange has been found to be more than two orders of magnitude faster compared to that on H-BEA. The decrease of reaction temperature and activation energy of the exchange on Zn/H-BEA (86–88 kJ mol−1) compared to the acidic form of zeolite H-BEA (138 kJ mol−1) has been rationalized by the promoting effect of zinc. We propose that the mechanism of the H/D exchange on Zn/H-BEA involves Zn-alkyl species as intermediates.

Stepanov A.G. , Arzumanov S.S. , Gabrienko A.A. , Toktarev A.V. , Parmon V.N. , Freude D.
Zn-Promoted Hydrogen Exchange for Methane and Ethane on Zn/H-BEA Zeolite: In situ 1H MAS NMR Kinetic Study
Journal of Catalysis. 2008. V.253. N1. P.11-21. DOI: 10.1016/j.jcat.2007.11.002 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Jul 18, 2007
Accepted:	Nov 3, 2007
Published online:	Nov 28, 2007
Published print:	Jan 1, 2008

Web of science:	WOS:000257176900002
Scopus:	2-s2.0-37049000406
Elibrary:	13576710
Chemical Abstracts:	2007:1440103
Chemical Abstracts (print):	148:191546
OpenAlex:	W2038833638

DB	Citing
Web of science	63
Scopus	66
Elibrary	63
OpenAlex	70