Advantage of Ni/SBA-15 catalyst over Ni/MgO catalyst in terms of catalyst stability due to release of water during nitrobenzene hydrogenation to aniline

作者：Mohan V; Pramod C V; Suresh M; Reddy K Hari Prasad; Raju B David; Rao K S Rama^*

来源：Catalysis Communications, 2012, 18: 89-92.

DOI：10.1016/j.catcom.2011.11.030

• Ni/SBA-15 catalyst
• Ni/MgO catalyst
• Nitrobenzene hydrogenation
• Aniline
• Hydrophobic nature

Two catalysts, Ni/SBA-15 and Ni/MgO were prepared by wet impregnation technique with 5 wt.% Ni loading in each catalyst. These were tested for nitrobenzene hydrogenation to aniline reaction under vapor phase at atmospheric pressure. Ni/MgO suffered a huge loss in the activity (conversion) during time on stream study even though the Ni dispersion is larger compared to that in SBA-15 supported catalyst. TPR studies of used catalysts confirm coking of the catalysts. The superior catalytic activity in terms of conversion and selectivity during time on stream operation exhibited by Ni/SBA-15 catalyst is due to the hydrophobic nature of this catalyst (resistant to water generated during the reaction) and the effect of coking is not significant.

• 出版日期2012-2-10