Effect of metal loadings on catalytic dry oxidation of phenol by CuO/AC catalyst-sorbents
金属担载量对CuO/AC干法催化氧化苯酚的影响

Adsorption of organic pollutants from waste waters at ambient conditions followed by catalytic dry oxidation of these adsorbed materials at low temperatures has been reported to be a promising method for the treatment of toxic and/or bio-refractory wastewaters.This work mainly investigated the effect of metal loadings on the catalytic activity of the CuO/AC catalyst-sorbent used for the catalytic dry oxidation of phenol through temperature-programmed oxidation(TPO) and consecutive adsorption-oxidation experiments. The results indicate that increasing metal loadings promotes the phenol oxidation activity of the CuO/AC catalyst-sorbent,and enhances the affinity between the phenol and the CuO/AC catalyst-sorbent.This makes the adsorbed phenol desorb and/or de-associatively desorb from the catalyst-sorbent difficult.In addition,the ignition activity of the CuO/AC catalyst-sorbent itself is improved with increasing metal loadings.According to these results,it is clear that there is a proper metal loadings range of 3 ~ 5% for the CuO/AC catalyst-sorbent used for catalytic dry oxidation of phenol,which is calculated as the Cu weight percent.