Adsorption and Thermal Regeneration of Toluene and Benzene on the Fixed Bed Packed with Activated Carbon and Activated Carbon Fiber

Kim, Jong-Hwa; Oh, Ok-Kyun; Haam, Seung-Joo; Lee, Chang-Ha; Kim, Woo-Sik

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자료유형: 학술저널

저자정보: Kim, Jong-Hwa (Department of Chemical Engineering, Yonsei University) Oh, Ok-Kyun (Department of Chemical Engineering, Yonsei University) Haam, Seung-Joo (Department of Chemical Engineering, Yonsei University) Lee, Chang-Ha (Department of Chemical Engineering, Yonsei University) Kim, Woo-Sik (Department of Chemical Engineering, Yonsei University)

저널정보: 한국탄소학회 Carbon science Carbon science 제2권 제1호

발행연도: 2001.1

수록면: 44 - 54 (11page)

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The characteristics of adsorption and desorption of benzene and toluene were investigated at a fixed bed packed with the activated carbon and activated carbon fiber. Through breakthrough experiments under various feed concentration conditions, it was found that the slope of mass transfer zone and the tailing in the breakthrough curves were different from the feed conditions due to different heats of adsorption. In hot nitrogen desorption, the regeneration time and mass transfer zone of the toluene desorption curve were longer than those of the benzene desorption curve because of the difference in adsorption affinity. With an increase in the regeneration temperature, the height of roll-up and the sharpness of desorption curves increased but the regeneration times decreased. The adsorption capacities of the activated carbon and activated carbon fiber after three-time thermal regenerations decreased about 25% and 37% for benzene and 18% and 25% for toluene, respectively. To investigate the effect of the regeneration temperature on the energetic efficiency, the characteristic desorption temperatures of toluene and benzene were investigated by calculating purge gas consumption and temperature.

#Thermal regeneration #GAC #ACF #roll-up #characteristic temperatures

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