Hydrodesulfurization of dibenzothiophene derivatives over TiO2Al2O3 supported sulfided molybdenum catalyst

Pophal, C.; Kameda, F.; Hoshino, Kazuhiro; Yoshinaka, S; Segawa, Kohichi

doi:10.1016/s0920-5861(97)00085-0

Cited by 134 publications

(56 citation statements)

References 35 publications

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“…However, they did not present results on HYD selectivity, but reported that compared to monometallic Pd/ASA a Pd-Pt/ASA catalyst displayed a much higher C-S hydrogenolysis capacity. For conventional MoS 2 based catalysts it has been claimed that an increase in support's acidity promotes HYD pathway [5,6,17,26,27], but only minor increases are reported. This effect is also promoted by dopants such as F [27].…”

Section: Resultsmentioning

confidence: 99%

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

2009

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A silica-alumina supported Pd-Pt bimetallic catalyst was found to be highly active in dibenzothiophene hydrodesulfurization with preferential selectivity to the hydrogenation (HYD) route of desulfurization at the expense of the direct removal of sulfur. In addition, it was demonstrated that for Pd-Pt catalysts selectivity to HYD can be drastically changed by a ''soft'' change in the nature of the carrier.

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Section: Resultsmentioning

confidence: 99%

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

2009

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“…fluorine [2,3], phosphorus [4][5][6][7][8][9] or boron [10][11][12][13][14]. In addition, other active phases such as WS 2 [15][16][17][18][19], CrS x [20][21][22][23][24], noble metals [25][26][27][28][29][30][31][32][33][34][35][36][37], as well as other supports than alumina such as TiO 2 or mixed oxides [38][39][40][41][42][43][44][45][46][47][48] or carbon [49] and zeolites [50,51] were also investigated, giving a large pallet of a...…”

Section: Introductionmentioning

confidence: 99%

Description of coordinatively unsaturated sites regeneration over MoS2-based HDS catalysts using 35S experiments combined with computer simulations

Dumeignil

Paul²,

Veilly³

et al. 2005

Applied Catalysis A: General

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“…Moreover, MoO3 species on TiO2 support can be con verted much more easily into MoS2 by sulfidation and reduction than MoO3 species on Al2O3 support 20) . However, no explanation for the substantial difference in HDS activity between alumina-and titania-supported catalysts has been elucidated, since the increase in activity with TiO2 support cannot be completely explained by the differences in dispersion or sulfidation of the active metallic species 8), 9) .…”

Section: T I T a N I A M A Y P R O M O T E T H E F O R M A T I O N O mentioning

confidence: 99%

Sulfidation State and Sulfur Behavior on Mo-based HDS Catalysts Supported on TiO<sub>2</sub> Using <sup>35</sup>S Tracer Methods

Ishihara

2008

J. Jpn. Petrol. Inst.

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A35 S radioisotope pulse tracer method using 35 S-labeled H2S was used to investigate the sulfidation state of Mo-based catalysts supported on TiO2. Despite the coverage of Mo species on the TiO2 support, sulfidation of the TiO2 support still occurred at 300℃. The sulfided catalysts could be reduced under H2 atmosphere. A 35 S radioisotope tracer method using 35 S-labeled dibenzothiophene ([ 35 S]DBT) was used to determine the sulfur mobility on the working sulfided Mo/TiO2 catalysts. The amount of labile sulfur (So), which represents the amount of active sites, and the release rate constant of H2S, which represents the mobility of the active site (kRE), were estimated. Compared with Mo/Al2O3 catalyst, Mo/TiO2 catalyst had slightly higher So and about 2 times higher kRE, which indicate that new mobile active sites were formed on sulfided Mo/TiO2 catalyst. Comparison of the kRE and So of titania-based and alumina-based catalysts suggested that the active phase consisted of a 'TiMoS' phase exhibiting a promoting effect similar to the well-known 'CoMoS' phase (promotion of the MoS2 active phase by Ti atoms). Hydrodesulfurization (HDS) of DBT was evaluated over Mo catalysts supported on titania synthesized by the pH swing method, which provides a TiO2 carrier with a high specific surface area (134 m

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Hydrodesulfurization of dibenzothiophene derivatives over TiO2Al2O3 supported sulfided molybdenum catalyst

Cited by 134 publications

References 35 publications

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

Description of coordinatively unsaturated sites regeneration over MoS2-based HDS catalysts using 35S experiments combined with computer simulations

Sulfidation State and Sulfur Behavior on Mo-based HDS Catalysts Supported on TiO<sub>2</sub> Using <sup>35</sup>S Tracer Methods

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