Association between VOCs adsorption capacity of activated carbons and their diverse characteristic values
XIONG Ye-dong1, KE Quan-li1, HUANG Kang-Knag1, MIN Jiong2, JIN Chuan-min2, ZHANG Pei-li3, GU Zhen-yu4, WEN Xiao-le5, LU Han-feng1
1. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310000, China; 2. Zhejiang Yuesheng Environmental Technology Company Limited, Huzhou 313300, China; 3. Taizhou Environmental Science Design and Research Institute, Taizhou 318000, China; 4. Zhejiang Eco-Environmental Science Design and Research Institute, Hangzhou 310000, China; 5. College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310000, China
Abstract：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.
熊烨栋, 柯权力, 黄康康, 闵炯, 金传敏, 章佩丽, 顾震宇, 翁小乐, 卢晗锋. 活性炭对VOCs的吸附性能与其特征值之间的关系[J]. 中国环境科学, 2024, 44(8): 4193-4201.
XIONG Ye-dong, KE Quan-li, HUANG Kang-Knag, MIN Jiong, JIN Chuan-min, ZHANG Pei-li, GU Zhen-yu, WEN Xiao-le, LU Han-feng. Association between VOCs adsorption capacity of activated carbons and their diverse characteristic values. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(8): 4193-4201.
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