Properties and Deactivation of the Active Sites of an MoZSM-5 Catalyst for Methane Dehydroaromatization: Electron Microscopic and EPR Studies | Sciact - CRIS-system of Boreskov Institute of Catalysis

Properties and Deactivation of the Active Sites of an MoZSM-5 Catalyst for Methane Dehydroaromatization: Electron Microscopic and EPR Studies Full article

Journal

Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210

Output data

Year: 2006, Volume: 47, Number: 3, Pages: 389-394 Pages count : 6 DOI: 10.1134/S0023158406030104

Tags

Zeolite; Methane Conversion; Molybdenum Carbide; Zeolite Surface; Methane Decomposition

Authors

Zaikovskii V.I. ¹ , Vosmerikov A.V. ² , Anufrienko V.F. ¹ , Korobitsyna L.L. ² , Kodenev E.G. ¹ , Echevsky G.V. ¹ , Vasenin N.T. ¹ , Zhuravkov S.P. ³ , Matus E.V. ¹ , Ismagilov Z.R. ¹ , Parmon V.N. ¹

Affiliations

1	Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia
2	Institute of Petroleum Chemistry, Siberian Division, Russian Academy of Sciences, Tomsk, 634055, Russia
3	Institute of Strength Physics and Materials Science, Siberian Division, Russian Academy of Sciences, Tomsk, 634055, Russia

The MoZSM-5 (4.0 wt % Mo) catalyst has been characterized by high-resolution transmission electron microscopy, EDXA, and EPR. Two types of molybdenum-containing particles are stabilized in the catalyst in the course of nonoxidative methane conversion at 750°C. These are 2-to 10-nm molybdenum carbide particles on the zeolite surface and clusters smaller than 1 nm in zeolite channels. According to EPR data, these clusters contain the oxidized molybdenum form Mo5+. The surface Mo2C particles are deactivated at the early stages of the reaction because of graphite condensation on their surface. Methane is mainly activated on oxidized molybdenum clusters located in the open molecular pores of the zeolite. The catalyst is deactivated after the 420-min-long operation because of coke buildup on the zeolite surface and in the zeolite pores.

Zaikovskii V.I. , Vosmerikov A.V. , Anufrienko V.F. , Korobitsyna L.L. , Kodenev E.G. , Echevsky G.V. , Vasenin N.T. , Zhuravkov S.P. , Matus E.V. , Ismagilov Z.R. , Parmon V.N.
Properties and Deactivation of the Active Sites of an MoZSM-5 Catalyst for Methane Dehydroaromatization: Electron Microscopic and EPR Studies
Kinetics and Catalysis. 2006. V.47. N3. P.389-394. DOI: 10.1134/S0023158406030104 WOS Scopus РИНЦ ANCAN OpenAlex

Зайковский В.И. , Восьмериков А.В. , Ануфриенко В.Ф. , Коробицына (Кузнецова) Л.Л. , Коденев Е.Г. , Ечевский Г.В. , Васенин Н.Т. , Журавков С.П. , Матус Е.В. , Исмагилов З.Р. , Пармон В.Н.
Особенности активных центров катализатора Mo-ZSM-5 дегидроароматизации метана и их дезактивации по данным электронной микроскопии и ЭПР
Кинетика и катализ. 2006. Т.47. №3. С.396-401. RSCI РИНЦ

Submitted:	Oct 4, 2004
Published print:	May 1, 2006

Web of science:	WOS:000238264000010
Scopus:	2-s2.0-33747508932
Elibrary:	13523745
Chemical Abstracts:	2006:581097
Chemical Abstracts (print):	146:319041
OpenAlex:	W1989997138

DB	Citing
Web of science	33
Scopus	35
Elibrary	33
OpenAlex	37