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Preparation of TiO2-Al2O3 Support and Hydrodenitrogenation over Ni2P/TiO2-Al2O3 Catalyst

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Abstract:

A series of TiO2-Al2O3 composite supports were prepared by co-precipitation of titanium sulfate and aluminium nitrate , and the nickel phosphide catalysts were prepared by incipient wetness impregnation and in situ H2 reduction method. The catalysts were characterized by XRD, N2 adsorption, TPR, TEM and XPS techniques. Their hydrodenitrogenation (HDN) performances were evaluated by using quinoline as model molecules . The results show that TiO2 was evenly dispersed on massive γ-Al2O3 surface. The introduction of TiO2 weakened the strong interaction between Al2O3 and phosphate, and improved the reducibility of the precursors , facilitating to the formation of Ni2P active phase. TiO2 acted as an electronic promoter for the Ni-P catalyst and enhanced both the hydrogenation and C-N bond cleavage activities. Different Ti / Al molar ratio had great influence on HDN activity of the catalyst. The Ni2P /TiO2-Al2O3 with Ti/Al ratio of 1/8, exhibited the highest activity for quinoline HDN.

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Periodical:

Advanced Materials Research (Volumes 881-883)

Pages:

245-250

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.881-883.245

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Online since:

January 2014

Authors:

Jing Sen Yan*, Hai Yan Wang, Feng Wei He

Keywords:

Alumina, Hydrodenitrogenation, Nickel Phosphide, Quinoline, Titania

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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