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

作者：Sharifvaghefi Seyyedmajid; Zheng Ying^*

来源：ChemistrySelect, 2017, 2(17): 4678-4685.

DOI：10.1002/slct.201700851

• Greigite
• Heterogenous catalysis
• Hydrodesulfurization
• Magnetic properties
• Ni(Co)MoS/Fe3S4

Core-shell composites MoS2/Fe3S4, CoMoS/Fe3S4, NiMoS/Fe3S4 with greigite as the core were synthesized and compared to MoS2/Fe3O4 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 MoS2 and decorated on the layer-structured MoS2. NiMoS/Fe3S4 showed the highest activity in the hydrodesulfurization of DBT and 4,6-Dimethyldibenzothiophene (4,6-DMDBT) followed by CoMoS/Fe3S4 and MoS2/Fe3S4. 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.

• 出版日期2017-6-12