首页|Characterization and HDS activity of Mo and NiMo sulfided catalyst prepared by thioglycolic acid assisted hydrothermal deposition method
Characterization and HDS activity of Mo and NiMo sulfided catalyst prepared by thioglycolic acid assisted hydrothermal deposition method
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? 2022 Elsevier B.V.Dispersed NiMo sulfide catalysts were synthesized by hydrothermal deposition method with the assistance of thioglycolic acid (TGA) as sulfiding agent ex situ at 160 °C. The prepared samples were characterized by SBET, XRD, SEM, FTIR, XPS, TPR/TPS, TPD-NH3. The catalyst activity was investigated during hydrodesulfurization (HDS) of thiophene (TH) at 340 °C. XRD and XPS methods showed that this hydrothermal synthesis of Mo and NiMo solids yielded sulfide crystalline phases with high bulk and surface S/Mo ratio. Re-sulfidation of the Ni-containing samples led to an increase in surface area, which was thus able to redisperse the NiMo sulfide active sites. The results of temperature programmed sulfidation measurements combined with mass spectrometric analysis (TPS-MS) of the catalysts revealed the formation of a fraction of TGA species that remained in the pores of the sample with the highest TGA content. In the NiMo catalyst prepared at TGA/Mo molar ratio of four, this TGA enhanced the amount of NiMoS phase in the catalyst and positively affected the HDS activity.
HDS of thiopheneHydrothermal synthesisNiMo catalystsThioglycolic acid
Kaluza L.、Jiratova K.、Gulkova D.、Palcheva R.、Tyuliev G.、Dimitrov L.、Avdeev G.
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Institute of Chemical Process Fundamentals Academy of Sciences of the Czech Republic
Institute of Catalysis Bulgarian Academy of Sciences
Institute of Mineralogy and Crystallography “Acad. I. Kostov” Bulgarian Academy of Sciences
Institute of Physical Chemistry Bulgarian Academy of Sciences
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