EXPERIMENTAL RESEARCH ON VACUUM-THERMAL REGENERATION OF ACTIVATED CARBON FOR ADSORPTION OF VOCs AND THE INFLUENCING FACTORS

DANG Xiaoqing; JING Kairui; MA Hongzhou; DONG Haoyun; CAO Li; LI Yu; LIU Xia; LI Shijie

doi:10.13205/j.hjgc.202208008

Volume 40 Issue 8

Nov. 2022

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DANG Xiaoqing, JING Kairui, MA Hongzhou, DONG Haoyun, CAO Li, LI Yu, LIU Xia, LI Shijie. EXPERIMENTAL RESEARCH ON VACUUM-THERMAL REGENERATION OF ACTIVATED CARBON FOR ADSORPTION OF VOCs AND THE INFLUENCING FACTORS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 62-68,130. doi: 10.13205/j.hjgc.202208008

Citation:

DANG Xiaoqing, JING Kairui, MA Hongzhou, DONG Haoyun, CAO Li, LI Yu, LIU Xia, LI Shijie. EXPERIMENTAL RESEARCH ON VACUUM-THERMAL REGENERATION OF ACTIVATED CARBON FOR ADSORPTION OF VOCs AND THE INFLUENCING FACTORS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 62-68,130. doi: 10.13205/j.hjgc.202208008

Citation:

DANG Xiaoqing, JING Kairui, MA Hongzhou, DONG Haoyun, CAO Li, LI Yu, LIU Xia, LI Shijie. EXPERIMENTAL RESEARCH ON VACUUM-THERMAL REGENERATION OF ACTIVATED CARBON FOR ADSORPTION OF VOCs AND THE INFLUENCING FACTORS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 62-68,130. doi: 10.13205/j.hjgc.202208008

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EXPERIMENTAL RESEARCH ON VACUUM-THERMAL REGENERATION OF ACTIVATED CARBON FOR ADSORPTION OF VOCs AND THE INFLUENCING FACTORS

doi: 10.13205/j.hjgc.202208008

1. Shaanxi Key Laboratory of Environmental Engineering, Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Shaanxi Key Laboratory of Gold and Resources, Metallurgical Engineering Department, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received Date: 2021-12-28
Publish Date: 2022-11-08

Abstract

Abstract

The regeneration and recycling of activated carbon are important to reduce the cost of VOCs treatment by adsorption method and to reduce the amount of hazardous waste generated. The activated carbon adsorbed ethyl acetate was regenerated by vacuum-thermal regeneration method, the effect of regeneration temperature and holding time on the regeneration effect of activated carbon, and the recycling performance of activated carbon by vacuum-thermal regeneration method were investigated. The results showed that the loss rate of activated carbon increased with the increase of regeneration temperature, and the maximum loss rate of activated carbon was only 0.7%, when the regeneration temperature was less than 200 ℃; the desorption rate of ethyl acetate reached 93.8% and the equilibrium adsorption capacity of activated carbon after regeneration was 108.1 mg/g at the optimal experimental condition of 200 ℃ and holding time of 30 min. The specific surface area and pore size distribution showed that vacuum-thermal regeneration had almost no effect on the structure of activated carbon when the temperature was lower than 200 ℃; the specific surface area of activated carbon increased by 22, 19, 42 m²/g after regeneration at 300, 400, 500 ℃, respectively, compared with that of the new activated carbon. After six cycles of regeneration under optimal regeneration conditions, the equilibrium adsorption capacity of activated carbon for ethyl acetate reached 97% of that of the new activated carbon, indicating that vacuum-thermal regeneration method had good regeneration performance for activated carbon.
- activated carbon,
- vacuum-thermal regeneration,
- specific surface area,
- cycle regeneration

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References(28)

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