The Origin of Extraordinary Selectivity in Dehydrogenation of Methylcyclohexane over Ni-Sn-Based Catalysts Full article
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Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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| Output data | Year: 2023, Volume: 476, Article number : 146629, Pages count : 13 DOI: 10.1016/j.cej.2023.146629 | ||
| Tags | heterogeneous catalysis, hydrogen storage, LOHC, dehydrogenation, nickel catalysts, 24 nickel-tin catalysts | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0005 |
Abstract:
High-loaded nickel catalysts (HLNC) modified with Sn were synthesized and tested in dehydrogenation of methylcyclohexane (MCH) as a liquid organic hydrogen carrier. The catalyst composition and its reduction temperature were optimized that enabled to achieve the dehydrogenation selectivity of 99.0 % at a MCH conversion of 92 % and WHSV of 6.0 h−1, while the 99.9 % selectivity was reached at the conversion of 60.4 %, and WHSV of 18.5 h−1. Further, stability of the high selectivity of Sn-modified HLNC was demonstrated in the long-run (100 h) catalyst test. The genesis of the HLNC during their modification with Sn and reductive activation in hydrogen was studied. It was shown that the activation at temperatures above 450 °C resulted in a uniform distribution of Sn with the predominant formation of solid NiSn solutions having a crystal lattice of metallic nickel. The formation of the solid solutions provided a decrease in the adsorptive properties relating to the reaction product, toluene, which, in turn, led to an increase in the selectivity of MCH dehydrogenation.
Cite:
Koskin A.P.
, Stepanenko S.A.
, Alekseeva (Bykova) M.V.
, Bulavchenko O.A.
, Gerasimov E.Y.
, Lysikov A.I.
, Yeletsky P.M.
, Kaichev V.V.
, Yakovlev V.A.
The Origin of Extraordinary Selectivity in Dehydrogenation of Methylcyclohexane over Ni-Sn-Based Catalysts
Chemical Engineering Journal. 2023. V.476. 146629 :1-13. DOI: 10.1016/j.cej.2023.146629 WOS Scopus РИНЦ AN OpenAlex
The Origin of Extraordinary Selectivity in Dehydrogenation of Methylcyclohexane over Ni-Sn-Based Catalysts
Chemical Engineering Journal. 2023. V.476. 146629 :1-13. DOI: 10.1016/j.cej.2023.146629 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jun 6, 2023 |
| Accepted: | Oct 10, 2023 |
| Published online: | Oct 11, 2023 |
| Published print: | Nov 15, 2023 |
Identifiers:
| Web of science: | WOS:001096507900001 |
| Scopus: | 2-s2.0-85174006111 |
| Elibrary: | 55292324 |
| Chemical Abstracts: | 2023:2142729 |
| OpenAlex: | W4387524313 |