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

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 Al 3+ (IV) tetrahedral coordinated sites. The support composition affects...

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Bibliographic Details
Published inPetroleum science and technology Vol. 38; no. 2; pp. 91 - 97
Main Authors Leyva, Carolina, Trejo-Zárraga, Fernando
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 17.01.2020
Taylor & Francis Ltd
Subjects
[sbond]Al
Aluminum
Catalysts
Composition effects
Coordination numbers
heavy crude oils
Hydrocracking
hydrodeasphalting
Molybdenum
Ni[sbond]Mo catalysts
Nickel
NMR spectroscopy
Silicon
SiO
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Summary: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 Al 3+ (IV) tetrahedral coordinated sites. The support composition affects the Si[sbond]OH[sbond]Al network, where cations (Al 3+ or Si 4+ ) 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 27 Al MAS NMR.
ISSN:1091-6466
1532-2459
DOI:10.1080/10916466.2019.1671865