화학공학소재연구정보센터
Applied Catalysis B: Environmental, Vol.12, No.2-3, 111-123, 1997
Destruction of Trichloromethane with Catalytic-Oxidation
In this study, we investigate the thermal destruction of CHCl3 over a Pt/Al2O3 alloy catalyst under oxygen-rich conditions. All experiments at temperatures in the range 200-475 degrees C are performed to examine the kinetics of oxidation and the reaction products. Effects of oxygen and CHCl3 content in carrier gas on the catalyst’s reaction rate are also observed. Experimental results indicate that the kinetic behavior of CHCl3 oxidation with catalysis can be accounted for by using the rate expression of the power-law. Kinetic parameters are also developed on the basis of the differential reactor data. Besides, the integral reactor experiments are carried out at the entire temperature range. The conversions of CHCl3 related with temperature are also observed. Also, experimental results are compared with those of the model predicted. Moreover, the reaction pathway on decomposition of CHCl3 is proposed. The products of catalytic oxidation are carbon dioxide, chlorine and hydrogen chloride. Carbon tetrachloride is observed as an intermediate in the oxidation process, being formed to an insignificant extent only between 300 degrees C and 375 degrees C. No carbon-chlorine bonds are left at 475 degrees C with the mass balance on carbon and chlorine atoms.