Adsorption behaviors of CH3SH and CH3CHO on copper impregnated activated carbons

According to Cu loading, the adsorption behaviors of methyl mercaptan and acetaldehyde on the activated carbons were investigated. In this study, the effects of the pore structure and the surface chemistry on the adsorbed capacity of methyl mercaptan and acetaldehyde were mainly focused. The pore structure of the activated carbons was evaluated using nitrogen adsorption experiment. The surface characteristics were studied using pH of the carbon surface and acid and base values from Boehm titration. Furthermore, the mechanistic feature for the adsorption and the oxidation reaction of methyl mercaptan over Cu loaded on the activated carbons was investigated using XRD and TGA experiments. The adsorbed amount of methyl mercaptan was increased up to Cu loading of 3 wt%, but it was deceased by increasing more than 3 wt% in Cu loading. For acetaldehyde, however, the adsorbed amount was gradually deemed with increasing of Cu loading.