Development of a Magnetically Recyclable Molybdenum Disulfide Catalyst for Direct Hydrodesulfurization

Sharifvaghefi, Seyyedmajid; Zheng, Ying

doi:10.1002/cctc.201500517

Cited by 21 publications

(15 citation statements)

References 36 publications

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“…21,34,48 4,6-DMDBT was also employed to further evaluate the adsorption performance of the obtained BN mesoporous nanowires at 298 K. As is well-known, owing to its aromaticity and steric hindrance of the two methyl, 4,6-DMDBT was difficult to removed through hydrodesulfurization, oxidative desulfurization, or extractive desulfurization. 49,50 Hence, it is greatly important to remove 4,6-DMDBT. As shown in Figure 10, the BN mesoporous nanowires could also display excellent adsorption performance for 4,6-DMDBT (400 ppm initial sulfur concentration), and the adsorption capacity could reach 33.2 mg S g −1 adsorbent.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Boron Nitride Mesoporous Nanowires with Doped Oxygen Atoms for the Remarkable Adsorption Desulfurization Performance from Fuels

Xiong

Yang

Chao

et al. 2016

ACS Sustainable Chem. Eng.

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Novel BN mesoporous nanowire materials with doped oxygen atoms have been controlled and prepared successfully. Multiple techniques have been employed to determine the structure, morphology, surface feature, defects, and electronic structure. It was the first time that a controlled preparation of this unique structure was applied to adsorptive desulfurization. The obtained BN mesoporous nanowires displayed outstanding adsorptive desulfurization activity for DBT (65.4 mg S g −1 adsorbent according to the Langmuir isotherm model), which was much higher than that of commercial BN and graphene-like BN. At the same time, the BN mesoporous nanowires displayed good stability and excellent adsorption performance for the 4,6-DMDBT (33.2 mg S g −1 adsorbent). The significant enhancement of adsorption desulfurization performance of BN mesoporous nanowires was ascribed to the large number of low coordinated atoms along the nanowire surface and mesopores, which could cause an interaction with DBT, and the doped oxygen atoms further strengthen the interaction.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Boron Nitride Mesoporous Nanowires with Doped Oxygen Atoms for the Remarkable Adsorption Desulfurization Performance from Fuels

Xiong

Yang

Chao

et al. 2016

ACS Sustainable Chem. Eng.

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“…The carbon contents in the samples was due to the presence of surfactant in the catalyst structure. As shown in our previous work, the surfactant CTAC plays two important roles. First, it assists with anchoring MoS 2 on the surface of the greigite core and second, it functions as a scaffold platform to support the MoS 2 crystalline in the synthesis to form a core‐shell structure.…”

Section: Resultsmentioning

confidence: 71%

“…Recently, we showed a novel way to incorporate Fe 3 O 4 particles as magnetic carriers to synthesize a MoS 2 composite with magnetic properties . The composite showed an excellent ability in removing sulfur mainly through the direct desulfurization pathway (DDS).…”

Section: Introductionmentioning

confidence: 99%

Dispersed Ni and Co Promoted MoS₂ Catalysts with Magnetic Greigite as a Core: Performance and Stability in Hydrodesulfurization

Sharifvaghefi

Zheng

2017

ChemistrySelect

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with greigite as the core were synthesized and compared to MoS 2 /Fe 3 O 4 for hydrodesulfurization (HDS). The composites with a greigite core were found to have higher hydrogenation (HYD) selectivity in HDS of dibenzothiophene (DBT) compared to the one with a magnetite core and showed higher stability during different cycles of DBT HDS test. Cobalt and Nickel as a promoter are uniformly dispersed over MoS 2 and decorated on the layer-structured MoS 2 . NiMoS/Fe 3 S 4 showed the highest activity in the hydrodesulfurization of DBT and 4,6-Dimethyldi-benzothiophene (4,6-DMDBT) followed by CoMoS/Fe 3 S 4 and MoS 2 /Fe 3 S 4 . For the promoted catalysts, the direct desulfurization (DDS) pathway was found to be more selectively enhanced than the HYD route in HDS of DBT. HYD pathway was the dominant route in HDS of 4,6-dimethyldibenzothiophene (4,6-DMDBT). Moreover, they have high stability, and the magnetic properties associated with these nano-composites makes them an excellent choice for hydroprocessing of heavy petroleum oils in slurry reactors as they can be easily separated and reused.

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“…CTAC also has a scaffold effect during the formation of MoS 2 crystals. A hydrothermal method was applied for the synthesis of (Co or Ni)MoS 2 in this study, details of which can be found elsewhere . Briefly, sodium sulphide (0.21 g of nonahydrate crystals) was dissolved in DIW (5 mL).…”

Section: Methodsmentioning

confidence: 99%

Deoxygenation of stearic acid with a novel Ni(CO)‐MoS₂/Fe₃S₄ catalyst

Sharifvaghefi

Zheng

2017

Can J Chem Eng

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Magnetically recyclable Ni(Co)-promoted MoS 2 catalysts with greigite (G) core were synthesized and their activity and selectivity in hydrodeoxygenation of stearic acid were investigated. The activity of the catalysts tested at 320 8C and H 2 initial pressure of 3.5 MPa could be ranked as NiMo/G > CoMo/G > Mo/G. Two main products were detected, C18 (through HDO pathway) and C17 hydrocarbons (through DCO pathway). HDO was the dominant pathway for all of the catalysts. As for the C18/C17 ratio, the catalysts were found to be in the order: Mo/G > CoMo/G % NiMo/G. The Paraffin/Olefin ratio was over 1 for all of the catalysts with NiMo/G showing the highest ratio. Stearic acid was found to have an inhibiting effect on the adsorption of intermediates over the active sites. Moreover, the concentrations of intermediates decreased at high conversions of stearic acid. The formation of the intermediate aldehyde is through C-O hydrogenolysis of the fatty acid following the protonation, dehydrogenation, and hydride addition steps. The same steps were suggested to be involved in the transformation of the aldehyde to the alcohol. Formation of C n-1 hydrocarbons was found to be via decarbonylation route. The enhancement of the DCO pathway over the promoted catalysts was related to the electron transfer from the promoting atom to an adjacent sulphur atom and reduction in sulphur-metal bond strength.

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Development of a Magnetically Recyclable Molybdenum Disulfide Catalyst for Direct Hydrodesulfurization

Cited by 21 publications

References 36 publications

Boron Nitride Mesoporous Nanowires with Doped Oxygen Atoms for the Remarkable Adsorption Desulfurization Performance from Fuels

Boron Nitride Mesoporous Nanowires with Doped Oxygen Atoms for the Remarkable Adsorption Desulfurization Performance from Fuels

Dispersed Ni and Co Promoted MoS₂ Catalysts with Magnetic Greigite as a Core: Performance and Stability in Hydrodesulfurization

Deoxygenation of stearic acid with a novel Ni(CO)‐MoS₂/Fe₃S₄ catalyst

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Development of a Magnetically Recyclable Molybdenum Disulfide Catalyst for Direct Hydrodesulfurization

Cited by 21 publications

References 36 publications

Boron Nitride Mesoporous Nanowires with Doped Oxygen Atoms for the Remarkable Adsorption Desulfurization Performance from Fuels

Boron Nitride Mesoporous Nanowires with Doped Oxygen Atoms for the Remarkable Adsorption Desulfurization Performance from Fuels

Dispersed Ni and Co Promoted MoS2 Catalysts with Magnetic Greigite as a Core: Performance and Stability in Hydrodesulfurization

Deoxygenation of stearic acid with a novel Ni(CO)‐MoS2/Fe3S4 catalyst

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Product

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Dispersed Ni and Co Promoted MoS₂ Catalysts with Magnetic Greigite as a Core: Performance and Stability in Hydrodesulfurization

Deoxygenation of stearic acid with a novel Ni(CO)‐MoS₂/Fe₃S₄ catalyst