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Dehydrochlorination of 1-Chlorobutane Over Nanocrystalline MgO: The Role of Electron-Acceptor Sites Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Conference EuropaCat-XIII: 13th European Congress on Catalysis
27-31 Aug 2017 , Florence
Journal Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028
Output data Year: 2018, Volume: 61, Number: 18-19, Pages: 2035-2041 Pages count : 7 DOI: 10.1007/s11244-018-1000-8
Tags Nanocrystalline oxide; Dehydrochlorination; EPR; Chlorobutane; Radical cation; Aerogel
Authors Shuvarakova Ekaterina I. 1,2 , Bedilo Alexander.F. 1,2 , Chesnokov Vladimir V. 1 , Kenzhin Roman M. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Prospekt Lavrentieva 5, Novosibirsk, Russia 630090
2 Novosibirsk Institute of Technology, Kosygin Russian State University, Krasny Prospekt 35, Novosibirsk, Russia 630099

Funding (1)

1 Russian Foundation for Basic Research 16-33-00267

Abstract: Nanocrystalline MgO aerogels possess high surface areas and outstanding reactivity with respect to variety of harmful organic substances. The catalytic activity of MgO aerogels in dehydrochlorination of 1-chlorobutane substantially increases with time due to partial MgO conversion to MgCl2. This catalytic activity increase and surface area decrease indicate that more active catalytic sites are formed on the surface during this reaction. The catalytic activity was found to increase significantly during the 1-chlorobutane dehydrochlorination reaction, which is accompanied by the MgO modification with chloride ions. The activation energy of this reaction over partially chlorinated MgO was found to be equal to 135 kJ/mol at T < 225 °C and 63 kJ/mol at T > 225 °C. For the first time the concentrations of electron-acceptor sites were measured during a catalytic reaction. No electron-acceptor sites were observed on the surface of initial AP–MgO samples. They appeared only during the reaction. A good correlation was observed between the catalytic activity and the concentration of weak electron-acceptor sites tested using perylene. The obtained results indicate that they may be the active sites accounting for 1-chlorobutane dehydrochlorination in the active state of the catalyst.
Cite: Shuvarakova E.I. , Bedilo A.F. , Chesnokov V.V. , Kenzhin R.M.
Dehydrochlorination of 1-Chlorobutane Over Nanocrystalline MgO: The Role of Electron-Acceptor Sites
Topics in Catalysis. 2018. V.61. N18-19. P.2035-2041. DOI: 10.1007/s11244-018-1000-8 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Published online: Jun 4, 2018
Published print: Nov 1, 2018
Identifiers:
publication_identifier.wos_identifier_type WOS:000449551300023
publication_identifier.scopus_identifier_type 2-s2.0-85047985346
publication_identifier.rinz_identifier_type 41780232
publication_identifier.accession_number_identifier_type 2018:1089346
publication_identifier.chemical_accession_number_identifier_type 169:477744
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