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- W2466883374 abstract "BackgroundDeveloping the hydrodesulfurization (HDS) catalysts with the super high activity has been a challenging project for achieving the ultra-deep desulfurization ofdiesel fuels [1]. Here, we report a surfactant-assisted co-precipitation method for the preparation of unsupported Ni-Mo-W sulfide catalysts. The catalysts exhibitsuper high HDS activity for the real diesel up to 7.5 times excelling the conventional commercial catalysts. The sulfur level of the diesel fuels can be decreased toless than 1 ppm from 1400 ppm under the conventional operating conditions.ResultsA series of Ni-Mo-W sulfide catalysts were prepared with the different solvents and surfactants to investigate the effect of the catalyst properties on theHDS activity of Ni-Mo-W sulfide catalysts. The HDS catalytic activities of the sulfide catalysts were evaluated in a flow fixed-bed micro reactor. The sulfurcontent of the desulfurized diesel is reduced to less than 1 ppm from 1400 ppm.A model fuel containing 4,6-DMDBT in decalin was used to test the HDS activity and to calculate the 4,6-DMDBT HDS reaction kinetic parameters forthe catalysts. The catalysts also exhibited a higher intrinsic HDS activity. It is found that the overall rate constants for HDS reaction of the catalysts showedabout 3.0 times higher than that of the commercial catalyst.The catalysts were characterized by XRD, TEM, TPR, and XPS. The catalysts exhibit a uniform distribution of nanoparticles with the size of about 20 nm andpossibly forms some composite sulfide active phases with the average slab length of 2-5 nm and the average stack layer number of 4-8.Justification for acceptanceThe nano composite sulfide catalysts were synthesized through using a special method. These catalysts demonstrated an excellent HDS activity for thereal diesel fuels, which is about 7 times higher than the conventional commercial catalysts, and the ultra-low sulfur diesel (< 1 ppm sulfur) can be obtained" @default.
- W2466883374 created "2016-07-22" @default.
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- W2466883374 date "2008-08-31" @default.
- W2466883374 modified "2023-09-27" @default.
- W2466883374 title "Nano-particle metal sulfides for ultra-deep HDS of diesel fuels" @default.
- W2466883374 hasPublicationYear "2008" @default.
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