| Autor: |
Bo A. Carrillo, Michael A. Reynolds, Boris Ilic, Richard H. Bowker, Brendan Dermot Murray, Mark E. Bussell |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Applied Catalysis A: General. 482:221-230 |
| ISSN: |
0926-860X |
| DOI: |
10.1016/j.apcata.2014.05.026 |
| Popis: |
Silica-supported nickel phosphide (Ni 2 P) and Ni-rich bimetallic phosphide catalysts were investigated for the hydrodenitrogenation (HDN) of carbazole with and without a benzothiophene co-feed. The Ni 2 P/SiO 2 , Co 0.1 Ni 1.9 P/SiO 2 , and Fe 0.03 Ni 1.97 P/SiO 2 catalysts exhibited high carbazole HDN activities and out-performed a commercial sulfided Ni–Mo/Al 2 O 3 catalyst under the testing conditions employed. Co-feeding of benzothiophene inhibited carbazole HDN over the metal phosphides, but the Ni 2 P/SiO 2 and Ni-rich bimetallic phosphide catalysts maintained higher activities than the sulfided Ni–Mo/Al 2 O 3 catalyst. The product selectivities of the metal phosphide and sulfide catalysts were similar, except that the sulfided Ni–Mo/Al 2 O 3 catalyst yielded more hydrogenated carbazoles while the metal phosphide catalysts produced more of the partially hydrogenated hydrocarbon cyclohexylbenzene. The metal phosphide catalysts favored ring-opened (hexylcyclohexane) and ring-contracted ((2-methylcyclopentyl)cyclohexane) products, indicating the presence of metal and Bronsted acid sites on the catalyst surfaces. The Ni 2 P/SiO 2 and bimetallic phosphide catalysts exhibited excellent stabilities in the HDN conditions employed (carbazole-only and mixed feeds), as indicated by phase purity, average crystallite size and resistance to sulfur incorporation of the supported metal phosphide particles. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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