Effect of high-temperature treatment of sibunit on the activity of Ru-Cs(Ba)/sibunit catalysts in ammonia synthesis and their resistance to methanation Full article
| Journal |
Diamond & Related Materials
ISSN: 0925-9635 |
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| Output data | Year: 2020, Volume: 108, Article number : 107986, Pages count : 11 DOI: 10.1016/j.diamond.2020.107986 | ||||
| Tags | Ru-Ba(Cs)/C catalysts for ammonia synthesisActivityResistance to methanationSibunit | ||||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 18-73-00255 |
Abstract:
Ru-Cs(Ba)/Sibunit catalysts with the molar ratio Cs(Ba):Ru = 2.5 were synthesized using the carbon composite Sibunit calcined at 1400, 1600, 1800, 2000 and 2200 °C. Activity of the promoted catalysts in ammonia synthesis and their thermal stability to methanation were compared. Substantial changes in the structure and properties of Sibunit during its calcination were shown to affect the activity of the synthesized catalysts. As the calcination temperature was raised, specific surface (Ssp) decreased considerably, the carbon structure became ordered, whereas the specific activity (Wsp) increased. Thus, Wsp at 400 °C for Cs-Ru/Sib1400 was equal to 0.107 mol NH3·gRu−1·h−1, while for Cs-Ru/Sib2200 — 0.591 mol NH3·gRu−1·h−1. It was found that elevation of the calcination temperature and introduction of barium significantly enhanced thermal stability of the samples — the carbon loss decreased up to 10 times.
Cite:
Borisov V.A.
, Iost K.N.
, Temerev V.L.
, Fedotova P.A.
, Surovikin Y.V.
, Arbuzov А.B.
, Trenikhin М.V.
, Shlyapin D.A.
Effect of high-temperature treatment of sibunit on the activity of Ru-Cs(Ba)/sibunit catalysts in ammonia synthesis and their resistance to methanation
Diamond & Related Materials. 2020. V.108. 107986 :1-11. DOI: 10.1016/j.diamond.2020.107986 WOS Scopus РИНЦ OpenAlex
Effect of high-temperature treatment of sibunit on the activity of Ru-Cs(Ba)/sibunit catalysts in ammonia synthesis and their resistance to methanation
Diamond & Related Materials. 2020. V.108. 107986 :1-11. DOI: 10.1016/j.diamond.2020.107986 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Feb 28, 2020 |
| Accepted: | Jun 30, 2020 |
| Published online: | Jul 17, 2020 |
| Published print: | Oct 1, 2020 |
Identifiers:
| Web of science: | WOS:000571210800002 |
| Scopus: | 2-s2.0-85087995526 |
| Elibrary: | 45460052 |
| OpenAlex: | W3040176884 |