Hu, Yongfeng

Lin, Hongfei

MacLennan, Aimee

Zhang, Haiping

Zheng, Ying

A novel hydrothermal method for preparation of nano MoS2 for hydrodesulfurization (HDS) with MoO3 as precursors is presented. The redox reaction mechanism is, for the first time, revealed. It is shown to involve the oxidation of S2- to SO42- while hexavalent Mo is reduced to quadrivalent Mo to form MoS2. HS- group is identified to play a key role in reduction of MoO3. The acid-base behaviour of Na2S to HS- group and the yield of the resulting MoS2 are controlled via the pH of the synthesis solution. Various characterization methods, e.g. XRD, TEM, SEM, BET, TPR, XPS, XANES, EXAFS, etc. are employed for the characterization of the synthesized MoS2. The results show that high purity MoS2 is obtained. The ratio of precursors, MoO3 and Na2S, influences the crystal structure and catalytic activity. Slight less sulfur than stoichiometric ratio of S/Mo produces defect sites, which promotes catalyst activities in the hydrodesulfurization of real light cycle oil (LCO)

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Catalytic activity and chemical structure of Nano MoS2 synthesized in a controlled environment

https://www.pure.ed.ac.uk/ws/files/24783325/Chem_Reac_Eng_2nd_revision.pdf

Catalytic activity and chemical structure of Nano MoS2 synthesized in a controlled environment

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