Effect of solid-state synthesized alumina properties on the structure and catalytic performance of NiMo catalyst in hydrodesulfurization

Authors: Min Zhang, Tao Yang, Ruiyu Zhao, Chenguang Liu

Abstract:
In this paper, a precursor ammonium aluminum carbonate hydroxide (AACH) was synthesized by a lowtemperature solid-state reaction, then alumina labeled as Al₂O₃-AC was obtained by the calcination of AACH, and finally, catalyst labeled as NiMo/Al₂O₃-AC supported on Al₂O₃-AC was prepared using the method of incipient wetness impregnation. The properties of both support and catalyst were investigated by a series of characterization methods. The results indicated that Al₂O₃-AC had unique bimodal porous structure, high acid content and five-fold coordinated aluminum (AlO₅) on the surface. Moreover, NiMo/Al₂O₃-AC exhibited uniform dispersion of active components, higher Bronsted ˝ acid sites concentration and weaker metal-support interaction. Encouraged by those excellent properties of Al₂O₃-AC and NiMo/Al₂O₃-AC, the catalyst NiMo/Al₂O₃-AC was evaluated in the hydrodesulfurization (HDS) of dibenzothiophene (DBT), showing high conversion ratio of DBT.

Keywords:
AACH
Hydrodesulfurization catalyst
Structural features
Physicochemical properties
Catalytic performance

Published in: Applied catalysis A: General   (Volume 468, Pages 1-474, 5 November 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Effect of solid-state synthesized alumina properties on the structure and catalytic performance of NiMo catalyst in hydrodesulfurization

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