Effect of silicon content on active catalytic phase for hydrocracking of heavy crude oils

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    The silicon composition effect on acidic properties of Ni[sbond]Mo catalysts was investigated for hydrocracking reaction, where an optimal Si and Al ratio is required for the formation of Brønsted acid sites and as well as of Al3+ (IV) tetrahedral coordinated sites. The support composition affects the Si[sbond]OH[sbond]Al network, where cations (Al3+ or Si4+) have a coordination number of IV generating higher Brønsted acidity and macro-pores. The supports and fresh catalysts were characterized by atomic absorption, nitrogen physisorption, FT-IR of CO and pyridine adsorption and 27Al MAS NMR.

    Original languageEnglish
    Pages (from-to)91-97
    Number of pages7
    JournalPetroleum Science and Technology
    Issue number2
    StatePublished - 17 Jan 2020



    • heavy crude oils
    • hydrocracking
    • hydrodeasphalting
    • Ni[sbond]Mo catalysts
    • SiO[sbond]AlO

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