Effect of Bi on Catalytic Performance and Stability of MoVTeNb Catalysts in Oxidative Dehydrogenation of Ethane Full article
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Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Output data | Year: 2017, Volume: 534, Pages: 58-69 Pages count : 12 DOI: 10.1016/j.apcata.2017.01.023 | ||||
| Tags | Bi, Doping, Ethane oxidative dehydrogenation, M1 phase, Stability | ||||
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0006 (V.44.1.6) |
Abstract:
Catalysts with the Mo1V0.3Te0.23Nb0.12Bi0-0.05 compositions were prepared via spray-dry method and tested in ethane oxidative dehydrogenation (ODE) reaction. The catalysts were characterized by XRD, HRTEM, SEM and XPS. A strong effect of the bismuth content on physicochemical and catalytic properties was observed. At low Bi concentrations (Bi/Mo = 0.004–0.075) the M1/M2 ratio, morphology and dispersity of the M1 phase changed resulting in a decrease of the catalytic activity. The maximum activity, selectivity to ethylene and stability in reaction conditions were obtained at intermediate Bi concentrations (Bi/Mo = 0.015–0.025). These samples had the highest M1 amount among modified samples. Hindering of Te segregation along six-membered channels of the M1 phase preventing the Te loss was detected. Bi incorporation in such channels and its possible participation in active ensembles are assumed to be responsible both for the stability and enhanced catalytic properties of the M1 phase. A further increase of the bismuth content (Bi/Mo = 0.05) was accompanied by a decrease of the M1 particle size and structural disordering. Suppression of the M1 phase crystallization and formation of less active and selective M2 and M5O14 phases (M-Mo,V,Nb) were observed at the maximum bismuth content.
Cite:
Ishchenko E.V.
, Gulyaev R.V.
, Kardash T.Y.
, Ishchenko A.V.
, Gerasimov E.Y.
, Sobolev V.I.
, Bondareva V.M.
Effect of Bi on Catalytic Performance and Stability of MoVTeNb Catalysts in Oxidative Dehydrogenation of Ethane
Applied Catalysis A: General. 2017. V.534. P.58-69. DOI: 10.1016/j.apcata.2017.01.023 WOS Scopus РИНЦ ANCAN OpenAlex
Effect of Bi on Catalytic Performance and Stability of MoVTeNb Catalysts in Oxidative Dehydrogenation of Ethane
Applied Catalysis A: General. 2017. V.534. P.58-69. DOI: 10.1016/j.apcata.2017.01.023 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Oct 14, 2016 |
| Accepted: | Jan 28, 2017 |
| Published online: | Jan 31, 2017 |
| Published print: | Mar 1, 2017 |
Identifiers:
| Web of science: | WOS:000395844800007 |
| Scopus: | 2-s2.0-85011684895 |
| Elibrary: | 29481725 |
| Chemical Abstracts: | 2017:215406 |
| Chemical Abstracts (print): | 166:218001 |
| OpenAlex: | W2585347480 |