Deep desulfurization of heavy atmospheric gas oil with CoMoAl catalysts effect of sulfur adsorption

Yitzhaki, D.; Landau, Miron V.; Berger, D.J.; Herskowitz, M.

doi:10.1016/0926-860x(94)00218-5

Cited by 20 publications

(2 citation statements)

References 12 publications

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“…Transition metal phosphides and especially silica-supported nickel phosphide Ni 2 P display activity in HDS, HDN, and hydrodechlorination of various fuels that are higher compared with traditional Co(Ni)Mo−S materials. − The latter require hydrogen at elevated temperature and pressure in ADS . Recently, testing silica supported nickel phosphides in a packed liquid-full reactor with no hydrogen indicated excellent performance in ADS (300 °C, LHSV = 6 h −1 ) yielding diesel fuel with <1 ppmw sulfur.…”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12] The latter require hydrogen at elevated temperature and pressure in ADS. 13 Recently, testing silica supported nickel phosphides in a packed liquid-full reactor with no hydrogen indicated excellent performance in ADS (300 °C, LHSV ) 6 h -1 ) yielding diesel fuel with <1 ppmw sulfur. The measured S-breakthrough capacity was as high as 16 mg/g.…”

Section: Introductionmentioning

confidence: 99%

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Ultradeep Hydrodesulfurization and Adsorptive Desulfurization of Diesel Fuel on Metal-Rich Nickel Phosphides

Landau

Herskowitz

Hoffman

et al. 2009

Ind. Eng. Chem. Res.

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Three materials containing Ni 2 P, Ni 12 P 5 , and Ni 3 P phases on silica gel with surface area 320 m 2 /g at loadings of 32-37 wt % and the crystal size of Ni x P phases 30, 9, and 13 nm, respectively, were prepared by a combination of impregnation and TPR methods and tested in hydrodesulfurization (HDS) and adsorptive desulfurization (ADS) of diesel fuel. There were established opposite trends in changing the DS efficiency in two processes: The HDS rate constant decreased while the ADS sulfur capacity (breakthrough at 1 ppmw) increased with increasing the Ni to P ratio in Ni x P from 2 to 3. The observed behavior was attributed to the specific features of the densities of states (DOS) obtained from the density functional theory calculations of total and partial DOS for Ni and P in Ni x P phases and revealed in XPS measurements of binding energy of Ni 2p 3/2 -and P 2p-electrons. This attribution was consistent with the analysis of the relative part of d-electrons of Ni participating in bonding with p-electrons of phosphorus in these phases.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultradeep Hydrodesulfurization and Adsorptive Desulfurization of Diesel Fuel on Metal-Rich Nickel Phosphides

Landau

Herskowitz

Hoffman

et al. 2009

Ind. Eng. Chem. Res.

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Sulfur‐33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement

2017

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The novel approach based on 33S isotope tracing is proposed for the elucidation of hydrodesulfurization (HDS) mechanisms and characterization of molybdenum sulfide catalysts. The technique involves sulfidation of the catalyst with 33S‐isotope‐labeled dihydrogen sulfide, followed by monitoring the fate of the 33S isotope in the course of the hydrodesulfurization reaction by online mass spectrometry and characterization of the catalyst after the reaction by temperature‐programmed oxidation with mass spectrometry (TPO‐MS). The results point to different pathways of thiophene transformation over Co or Ni‐promoted and unpromoted molybdenum sulfide catalysts, provide information on the role of promoter and give a key for the design of new efficient HDS catalysts.

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Sulfur‐33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement

2017

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The novel approach based on S isotope tracing is proposed for the elucidation of hydrodesulfurization (HDS) mechanisms and characterization of molybdenum sulfide catalysts. The technique involves sulfidation of the catalyst with S-isotope-labeled dihydrogen sulfide, followed by monitoring the fate of the S isotope in the course of the hydrodesulfurization reaction by online mass spectrometry and characterization of the catalyst after the reaction by temperature-programmed oxidation with mass spectrometry (TPO-MS). The results point to different pathways of thiophene transformation over Co or Ni-promoted and unpromoted molybdenum sulfide catalysts, provide information on the role of promoter and give a key for the design of new efficient HDS catalysts.

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Deep desulfurization of heavy atmospheric gas oil with CoMoAl catalysts effect of sulfur adsorption

Cited by 20 publications

References 12 publications

Ultradeep Hydrodesulfurization and Adsorptive Desulfurization of Diesel Fuel on Metal-Rich Nickel Phosphides

Ultradeep Hydrodesulfurization and Adsorptive Desulfurization of Diesel Fuel on Metal-Rich Nickel Phosphides

Sulfur‐33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement

Sulfur‐33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement

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