Macroporous NiMo/alumina catalyst for the hydrocracking of vacuum residue

作者：Kim Hanna; Chinh Nguyen Huy; Shin Eun Woo^*

来源：Reaction Kinetics, Mechanisms and Catalysis, 2014, 113(2): 431-443.

DOI：10.1007/s11144-014-0764-5

• Macroporosity
• Hydrocracking
• Vacuum residue
• NiMo
• Alumina support

We prepared a macro-mesoporous NiMo/alumina catalyst by the introduction of macroporosity to an alumina support, and tested its catalytic performance in the hydrocracking of vacuum residue for the first time. In this reaction, the use of the macro-mesoporous NiMo/alumina catalyst clearly led to a more desirable product distribution-a higher liquid yield and lower gas yield-than a mesoporous NiMo/alumina catalyst. This indicates that the macro-mesoporous catalyst structure facilitated hydrogenation relative to the mesoporous catalyst; for the latter, hydrocracking was relatively dominant. N-2 adsorption/desorption experiments confirmed that NiMo impregnation reduced the pore size and volume, as well as the surface area, implying that the NiMo phases were located inside the mesopores and macropores. Macroporosity in the alumina support played an important role in improving the accessibility of vacuum residue to the NiMo active sites located inside pores, which are responsible for hydrogenation. By promoting hydrogenation, the macro-mesoporous NiMo/alumina catalyst increased the liquid yield of the hydrocracking of vacuum residue.

• 出版日期2014-12