Liquid phase hydrogenation of aniline in a trickle bed reactor

Abstract

A rate equation is developed for the liquid phase hydrogenation of aniline over cylindrical catalyst pellets of 3076 nickel deposited on clay in a trickle bed reactor. The equation takes into account external and internal diffusional limitations, and describes the experimental data adequately. The hydrogenation reaction is first order with respect to hydrogen and zero order with respect to aniline. Effectiveness factors are in the range 0.003-0.03. Apparent activation energy of the reaction is 12.7 kcal/mol and true activation energy is 39.6 kcal/rnol.

Noble Metal Nanoparticles Stabilized by Hyper-Cross-Linked Polystyrene as Effective Catalysts in Hydrogenation of Arenes

“…However, in spite of the high initial reaction rate, Pt-containing HPS catalysts deactivated, especially at high initial concentrations of AN, which is seen from the shape of kinetic curves (see Figure 8 a). At the same time, the apparent activation energy was 53 ± 5 kJ/mol ( Figure 8 b), which is comparable with literature data [ 21 ]. Moreover, it was found that 1% Pt/HPS is rather stable at the reuse ( Table 2 , #1,2); although the initial reaction rate slightly decreases, conversion and selectivity achieved in 120 min of the reaction remains the same.…”