Journal
APPLIED CATALYSIS A-GENERAL
Volume 482, Issue -, Pages 221-230Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2014.05.026
Keywords
Hydrodenitrogenation; HDN; Carbazole; HDS; Benzothiophene; Nickel phosphide; Bimetallic phosphide; Cobalt nickel phosphide; Iron nickel phosphide
Categories
Funding
- Shell Global Solutions (U.S.) Inc.
Ask authors/readers for more resources
Silica-supported nickel phosphide (Ni2P) and Ni-rich bimetallic phosphide catalysts were investigated for the hydrodenitrogenation (HDN) of carbazole with and without a benzothiophene co-feed. The Ni2P/SiO2, Co0.1Ni1.9P/SiO2, and Fe0.03Ni1.97P/SiO2 catalysts exhibited high carbazole HDN activities and out-performed a commercial sulfided Ni-Mo/Al2O3 catalyst under the testing conditions employed. Co-feeding of benzothiophene inhibited carbazole HDN over the metal phosphides, but the Ni2P/SiO2 and Ni-rich bimetallic phosphide catalysts maintained higher activities than the sulfided Ni-Mo/Al2O3 catalyst. The product selectivities of the metal phosphide and sulfide catalysts were similar, except that the sulfided Ni-Mo/Al2O3 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 Ni2P/SiO2 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. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available