Effect of P/Ni molar ratio on the structure and hydrodesulfurization performance of nickel phosphide catalyst prepared by the solvothermal method

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• 作者：Hua SONG^a ; ^b ; ^{songhua2004@sina.com" class="auth_mail" title="E-mail the corresponding author} ; Jing GONG^a ; Nan JIANG^a ; Feng LI^a ; ^b ; Min DAI^a ; ^c ; Jiao-jing ZHANG^b ; De-zhi YU^b
• 关键词：solvothermal method ; nickel phosphide ; dibenzothiophene ; hydrodesulfurization
• 刊名：Journal of Fuel Chemistry and Technology
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：44
• 期：5
• 页码：557-563
• 全文大小：3493 K

文摘

A series of MCM-41-supported Ni_xP catalysts was prepared by the solvothermal method using low-price triphenylphosphine as phosphorus material and tri-n-octylamine as coordinating solution-phase. They were characterized with X-ray diffraction, N₂ sorption, CO sorption, X-ray photoelectron spectroscopy and transmission electron microscopy techniques. The effects of initial P/Ni molar ratio on their structures and hydrodesulfurization performances were investigated in a lab-scale continuous flow fixed-bed reactor by feeding 1% of dibenzothiophene (DBT) in decahydronaphthalene. It was shown that Ni₁₂P₅ was primarily formed with a small amount of Ni₂P at the initial P/Ni molar ratio of 0.5. When the initial P/Ni molar ratio was higher than 0.5, pure Ni₂P phase was generated, and its crystal size decreased, and thus, its dispersion increased with the increase of initial P/Ni molar ratio. At 613 K, 3.0 MPa, H₂/oil volume ratio of 500, and weight hourly space velocity of 2.0 h⁻¹, the DBT conversion nearly reached 100% on both the Ni-P(6)/MCM-41 and the Ni-P(10)/MCM-41 samples.