A Study on Adsorption Characteristics of Benzene over Activated Carbons Coated with Insulating Materials and Desorption by Microwave Irradiation

절연물질이 코팅된 활성탄의 벤젠 흡착특성 및 마이크로파에 의한 탈착에 관한 연구

  • Received : 2008.06.06
  • Accepted : 2008.07.17
  • Published : 2008.08.10

Abstract

In order to regenerate the activated carbon polluted by volatile organic compounds (VOCs) using microwave, adsorption and desorption characteristics of benzene over activated carbon (AC) coated with insulating materials were investigated. Physical characteristics of activated carbon and insulator-coated ACs were investigated by means of $N_2$ gas adsorption and scanning electron microscopy (SEM). The amount of VOC adsorbed showed a positive relationship with the specific surface area of the ACs, and spark discharge over insulator-coated ACs did not occur. Potassium silicate (PS) was the best binder for coating of insulating materials on AC. Amount of benzene desorbed by microwave irradiation was dependent on output power of microwave. Nearly same performance was obtained even though the adsorption-desorption operation under microwave irradiation was repeated 5 times. Finally, it was known that the microwave heating was a very effective mean for regenerating the polluted AC.

Keywords

benzene;adsorption;desorption;insulator-coated activated carbon;microwave;regeneration

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Acknowledgement

Supported by : 전남지역환경기술개발센터