STUDIES ON THE ADSORPTION AND CATALYTIC CONVERSION OF CARBON MONOXIDE AND NITROGEN MONOXIDE ON METAL-CONTAINING ACTIVATED CARBON FIBERS

The palladium, copper and other metal containing activated carbon fibers (ACF) were prepared by impregnating ACF with relative metal compound solutions. Their adsorption and catalytic properties for carbon monoxide (CO) and nitrogen monoxide (NO) were investigated by gas chromatography. The experimental results showed that Pd(II) containing ACF (ACF Pd) has outstanding adsorption ability for CO. The adsorption capacity and breakthrough time of CO increase with the increase of the loading amount of Pd(II) on ACF. Moreover, the ACF Pd/Cu which impregnated with the mixture of palladium and copper compound possesses higher adsorption efficiency for CO than ACF Pd and so the amount of palladium really used can be decreased to some extent. The palladium containing ACF (ACF Pd h), which had heated at 400 ℃, possesses high catalytic efficiency for the conversion of CO/NO mixture gas over 300 ℃. In suitable reaction conditions, the conversion rate of CO/NO reaches 100 %. If the amount of palladium used in impregnation is kept in the same, the ACF Pd/Cu h presents higher catalytic activity than ACF Pd h. After reaction for 70 hours, the conversion rate of CO/NO on ACF Pd/Cu h maintains 100 %.