Association between VOCs adsorption capacity of activated carbons and their diverse characteristic values
In this study,we investigated the relationship between the iodine number,carbon tetrachloride adsorption value(CTC value),total surface area,and micropore surface area of various activated carbon samples.We focused on their dynamic adsorption capacity for toluene,a representative volatile organic compound(VOC)found in exhaust gases.The results indicated that the CTC value showed a strong linear correlation with the adsorption capacity of activated carbon,regardless of toluene concentration in the exhaust gas.In contrast,the iodine number exhibited a better association with adsorption capacity only under low concentration conditions.This suggests that the CTC value is a more suitable indicator than the iodine number for evaluating the VOC adsorption performance of activated carbon.Furthermore,when oxygen-containing VOCs such as ethyl acetate were used as adsorbates,the CTC value also showed a favorable correlation with adsorption capacity.Beyond activated carbon,this study extended the methodology to different porous adsorbent materials,including silica gel,molecular sieves,and carbon-silica composites.The results demonstrated that the CTC value can also represent the VOC adsorption performance of these materials.This underscores the universality of the CTC value as a characteristic indicator of adsorption performance.
activated carbonVOCs adsorption capacitycarbon tetrachloride adsorption(CTC)rateiodine number
万方数据
维普
