Sciact
  • EN
  • RU

Effect of Preparation Mode on the Properties of Mn-Na-W/SiO2 Catalysts for Oxidative Coupling of Methane: Conventional Methods vs. POSS Nanotechnology Full article

Journal Eurasian Chemico-Technological Journal
ISSN: 1562-3920
Output data Year: 2016, Volume: 18, Number: 2, Pages: 93-110 Pages count : 18 DOI: 10.18321/ectj430
Tags Mn-Na-W/ SiO2 catalysts, Oxidative coupling of methane, Preparation methods
Authors Ismagilov I.Z. 1 , Matus E.V. 1 , Kuznetsov V.V. 1 , Kerzhentsev M.A. 1 , Yashnik S.A. 1 , Larina T.V. 1 , Prosvirin I.P. 1 , Navarro R.M. 2 , Fierro G.J. 2 , Gerritsen G. 3 , Abbenhuis H.C. 3 , Ismagilov Z.R. 1,4
Affiliations
1 Boreskov Institute of Catalysis SB RAS, pr. Akademika Lavrentieva, 5, 630090, Novosibirsk, Russia
2 Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, 28049, Madrid, Spain
3 Hybrid Catalysis B.V., Den Dolech 2, Eindhoven 5612, AZ, the Netherlands
4 Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy, 18, 650000, Kemerovo, Russia

Funding (2)

1 Federal Agency for Scientific Organizations V.45.1.10.
2 European Commission 262840 FP7-NMP-2010-LARGE-4 DEMCAMER

Abstract: Using XPS, BET, XRD, TG-DTA, HRTEM-EDX, TPR and UV-Vis Diffuse Reflectance spectroscopic methods the electronic, redox and structural properties of Mn-Na-W/SiO2 catalysts prepared by the incipient wetness impregnation method and mixture slurry method were studied in detail. Since POSS nanotechnology (POSS = polyhedral oligomeric silsesquioxanes) has attracted attention as tooling for synthesis of catalysts with novel properties and functionalities, we expanded this method for the preparation of Mn-Na-W/SiO2 catalyst. The physicochemical and catalytic properties of Mn-Na-W/SiO2 catalysts prepared by conventional methods and POSS nanotechnology were examined comparatively. In all studied Mn-Na-W/SiO2 catalysts both individual oxides (MnOx, WO3) and bimetal oxide phases (Na2WO4, MnWO4) are found in addition to oxide particles of high dispersion. The UV-Vis Diffuse Reflectance indicates that Na+ cations facilitates stabilization of octahedrally coordinated Mn3+Oh cations in the isolated state, while Mn3+Oh promote the disordering of W6+ cations in the supported system. The Mn-Na-W/SiO2 prepared using metal-POSS precursors marks out presence of unglobular SiO2 particles, higher dispersion of MnOx and MnWO4 particles and more easily reducible metal-oxide species. The catalysts prepared by incipient impregnation method and mixture slurry method have practically similar catalytic performance while the catalyst prepared by POSS nanotechnology method shows lower activity and selectivity. At 800‒850 °C the increase of C2 hydrocarbons yield from 4 to 15% and the rise of molar ratio С2Н4/C2H6 from 0.2 to 1 are observed when impregnation or mixture slurry method are used for catalyst preparation instead of POSS nanotechnology method.
Cite: Ismagilov I.Z. , Matus E.V. , Kuznetsov V.V. , Kerzhentsev M.A. , Yashnik S.A. , Larina T.V. , Prosvirin I.P. , Navarro R.M. , Fierro G.J. , Gerritsen G. , Abbenhuis H.C. , Ismagilov Z.R.
Effect of Preparation Mode on the Properties of Mn-Na-W/SiO2 Catalysts for Oxidative Coupling of Methane: Conventional Methods vs. POSS Nanotechnology
Eurasian Chemico-Technological Journal. 2016. V.18. N2. P.93-110. DOI: 10.18321/ectj430 WOS Scopus РИНЦ AN OpenAlex
Files: Full text from publisher
Dates:
Submitted: Oct 18, 2015
Accepted: Mar 12, 2016
Published print: May 25, 2016
Published online: Nov 30, 2016
Identifiers:
Web of science: WOS:000391003400002
Scopus: 2-s2.0-85019163434
Elibrary: 30020135
Chemical Abstracts: 2018:1027253
OpenAlex: W2579093453
Citing:
DB Citing
Web of science 16
Scopus 15
Elibrary 17
OpenAlex 17
Altmetrics: