Effect of titanium content on dibenzothiophene HDS performance over Ni2P/Ti-MCM-41 catalyst

Song, Hua; Wang, Jian; Wang, Zidong; Song, Hualin; Li, Feng; Jin, Zaishun

doi:10.1016/j.jcat.2013.11.021

Cited by 139 publications

(93 citation statements)

References 61 publications

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“…[6] DBT HDS activities over NiMo/Al-SMCFs-x catalysts .T hese valuesa re much higher than our previous published results over other mesoporous catalysts under such testing conditions ( Figure S7). Also, under certain testingc onditions, this superior HDS performance is better than some other promising or industrially used catalysts upports, such as MCM-41, [65] Al-SBA-15, [31] Al 2 O 3 , [62] and others. This result is possibly ascribed to the suitable physicochemical parameters, that is, the ultra-large cell-like pore sizes, high BET surfacea reas, large pore volumes,a nd the 3D pore structure of these Al-SMCFs-x materials.…”

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confidence: 90%

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

et al. 2015

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In the present work, a series of Al‐containing spherical mesostructured cellular silica foams (SMCFs) with different ultra‐large pore sizes were successfully synthesized by simply adjusting the mass ratio (x) of the swelling agent 1,3,5‐trimethylbenzene (TMB) to P123. The as‐synthesized Al‐SMCFs‐x were utilized as NiMo catalyst supports for the hydrodesulfurization of dibenzothiophene. The characterization results showed that, compared with other studied NiMo/Al‐SMCFs‐x catalysts, the NiMo/Al‐SMCFs‐1.25 catalyst exhibited higher sulfidation degree, higher dispersions of Ni and Mo species, shorter length, and lower stacking number of MoS2 slabs. It was also found that the NiMo/Al‐SMCFs‐1.25 catalyst possessed suitable physicochemical parameters [i.e., ultra‐large pore size (27.5 nm), high surface area (383 m2 g−1), and large pore volume (1.34 cm3 g−1), resulting in the formation of more type II active sites with more brim active sites. Consequently, the NiMo/Al‐SMCFs‐1.25 catalyst displayed outstanding catalytic performance for the hydrodesulfurization of dibenzothiophene.

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confidence: 90%

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

et al. 2015

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“…Current topics of study include investigation of the nitrogen tolerance [4], trimetallic compositions [5], the addition of additives like P and B [6] and Ga [7], the use of egg-shell or hierarchical supports [8], the use of composite supports [9,10], the use of zeolites [11], the use of mesoporous supports [12,13], oxidative desulfurization [14], and noble metals [15]. Metal phosphides have recently received extensive attention as a new type of hydrodesulfurization (HDS) catalyst because of their high activity and stability in the HDS and hydrodenitrogenation (HDN) of model and real feeds [8,[16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Nature of active sites in Ni2P hydrotreating catalysts as probed by iron substitution

Zhao

Oyama

Freund

et al. 2015

Applied Catalysis B: Environmental

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A series of NiFeP/SiO 2 catalysts with different Ni:Fe molar ratios (1:0, 3:1, 1:1, 1:3, 0:1) was investigated for the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene.The Fe component is a good probe for active sites because Ni 2 P and Fe 2 P adopt the same hexagonal crystal structure, yet Fe 2 P is completely inactive for HDS. X-ray diffraction analysis and FTIR spectroscopy of adsorbed CO indicated the formation homologous alloys. At 3.1 MPa and 613 K (340 o C) the activity of the alloys was similar to that of Ni 2 P, which was very high. There was also unprecedented selectivity towards direct desulfurization (DDS). A reconstruction of the NiFe phase occurred to expose more Ni sites, likely driven by the formation of surface Ni-S bonds as observed by EXAFS. The analysis showed that Ni(2) pyramidal sites responsible for hydrogenation were largely replaced by Fe. This left behind Ni(1) tetrahedral sites which favor DDS and explains the reactivity results.

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“…6b, NiMo/TGC-x show adsorption bands at 1447, 1490, 1558 and 1607 cm -1 . The bands at 1447 and 1607 cm -1 are attributed to Lewis acid sites [49], with the increasing of x, the Lewis acid sites increase at first and reach a maximum at x=0.5 then decrease. Duan et.…”

Section: Nh 3 -Tpd and Pyridine Ft-irmentioning

confidence: 96%

NiMo catalysts supported on graphene-modified mesoporous TiO2 toward highly efficient hydrodesulfurization of dibenzothiophene

Wang

Xiao

Cheng

et al. 2015

Applied Catalysis A: General

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Effect of titanium content on dibenzothiophene HDS performance over Ni2P/Ti-MCM-41 catalyst

Cited by 139 publications

References 61 publications

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

Nature of active sites in Ni2P hydrotreating catalysts as probed by iron substitution

NiMo catalysts supported on graphene-modified mesoporous TiO2 toward highly efficient hydrodesulfurization of dibenzothiophene

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