Abstract
The heterogeneous catalytic ozonation of nitrobenzene in aqueous solution has been carried out at different reaction temperatures in a semi-continuous batch reactor where ceramic honeycomb has been used as a catalyst. The experimental results indicated that the presence of ceramic honeycomb catalyst significantly improved the degradation efficiency of nitrobenzene compared to the results from non-catalytic ozonation, and the adsorption of nitrobenzene on the catalytic surface has no significant effect on its degradation efficiency. The degradation of nitrobenzene followed the pseudo-first-order kinetic model in both the processes of ozone alone and ozone/ceramic honeycomb. With the increase of reaction temperature from 278 K to 328 K, the degradation efficiency of nitrobenzene, the reaction rate constants, the utilization efficiency of ozone, the formation of hydroxyl radicals ( OH) and the removal of total organic carbon (TOC) all increased in the process of ozone/ceramic honeycomb. The enhancement of reaction rate constant and the enhancement of OH formation exhibited a good correlation in the reaction temperature scope of 278–328 K.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have