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Two Scenarios of Dechlorination of the Chlorinated Hydrocarbons over Nickel-Alumina Catalyst Full article

Journal Catalysts
ISSN: 2073-4344
Output data Year: 2020, Volume: 10, Number: 12, Article number : 1446, Pages count : 17 DOI: 10.3390/catal10121446
Tags hydrodechlorination; catalytic pyrolysis; carbon nanofibers; nickel catalyst; 1,2-dichloroethane; chloroform; chlorobenzene
Authors Mishakov Ilya V. 1,2 , Vedyagin Aleksey A. 1,2 , Bauman Yury I. 1,2 , Potylitsyna Arina R. 1,3 , Kadtsyna Anastasiya S. 1,3 , Chesnokov Vladimir V. 1 , Nalivaiko Anton Yu. 2 , Gromov Alexander A. 2 , Buyanov Roman A. 1
Affiliations
1 Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS
2 Catalysis Lab, National University of Science and Technology MISIS
3 Department of Natural Sciences, Novosibirsk State University

Funding (2)

1 Federal Agency for Scientific Organizations 0303-2016-0014
2 Ministry of Science and Higher Education of the Russian Federation 075-00268-20-02 (0718-2020-0040)(АААА-А20-120070890064-3)

Abstract: Dechlorination processes attract great interest since they are involved in environmental protection and waste disposal technologies. In this paper, the process of gas-phase dechlorination of 1,2-dichloroethane, chloroform, and chlorobenzene over Ni/Al2O3 catalyst (90 wt% Ni) prepared by a coprecipitation technique was investigated. The reduction behavior of the oxide precursor NiO/Al2O3 was studied by thermogravimetric analysis in a hydrogen medium. A thermodynamic assessment of the conditions under which metallic nickel undergoes deactivation due to the formation of nickel chloride was performed. The dechlorination of chlorinated substrates was studied using a gravimetric flow-through system equipped with McBain balances in a wide range of temperatures (350–650 °C) and hydrogen concentrations (0–98 vol%). The impact of these parameters on selectivity towards the products of hydrodechlorination (C2H4, C2H6, and C6H6) and catalytic pyrolysis (carbon nanomaterial and CH4) was explored. The relationship between the mechanisms of the catalytic hydrodechlorination and the carbide cycle was discussed, and the specific reaction conditions for the implementation of both scenarios were revealed. According to the electron microscopy data, the carbonaceous products deposited on nickel particles during catalytic pyrolysis are represented by nanofibers with a disordered structure formed due to the peculiarity of the process including the side carbon methanation reaction.
Cite: Mishakov I.V. , Vedyagin A.A. , Bauman Y.I. , Potylitsyna A.R. , Kadtsyna A.S. , Chesnokov V.V. , Nalivaiko A.Y. , Gromov A.A. , Buyanov R.A.
Two Scenarios of Dechlorination of the Chlorinated Hydrocarbons over Nickel-Alumina Catalyst
Catalysts. 2020. V.10. N12. 1446 :1-17. DOI: 10.3390/catal10121446 WOS Scopus РИНЦ AN OpenAlex
Files: Full text from publisher
Dates:
Submitted: Oct 31, 2020
Accepted: Dec 8, 2020
Published print: Dec 10, 2020
Published online: Dec 10, 2020
Identifiers:
Web of science: WOS:000602268900001
Scopus: 2-s2.0-85098489351
Elibrary: 45048382
Chemical Abstracts: 2021:35620
OpenAlex: W3111198069
Citing:
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Scopus 6
Web of science 6
Elibrary 5
OpenAlex 6
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