Active Carbon-ceramic Sphere as Support of Ruthenium Catalysts: Characterization and Catalytic Wet Air Oxidation (CWAO) of Resin Effluent

Abstract

Active carbon-ceramic sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-ceramic sphere and ruthenium catalysts were characterized by N2 adsorption, CO chemisorption and SEM measurements. BET surface area and total pore volume of active carbon(AC) in active carbon-ceramic sphere increase with increasing KOH-to-Carbon ratio, AC in the sample KC-120 possesses values as high as 1100 m2g-1 and 0.69 cm3g -1(carbon percentage: 4.73 wt. %), especially. Active carbon-ceramic sphere supported ruthenium catalysts were prepared using the RuCl3 solution impregnation onto KC-120, the ruthenium loading was fixed at 1-5 wt. % of AC in the support. As optimum catalyst, the 3 wt. % Ru/KC-120 catalyst displays the higher stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96% at the reaction temperature of 200 oC, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h-1 and the oxygen flow rate of 13.5 L h-1.