The influences of O3reaction on physico‐chemical characteristics of activated carbon for benzene adsorption

Abstract

Volatile organic compounds (VOCs) emitted from industrial manufacturing processes are commonly controlled by combustion and condensation methods: however, the most promising method is through adsorption by activated carbon. Ozone is used to oxidize activated carbon thus increasing the specific surface area, pore volume, and functional groups. As the results indicate, the specific surface area of activated carbon was increased from 783 m2/g to 851 m2/g. Pore size distribution analysis found the specific surface area on the activated carbon increases mainly at micropores. Oxygen functional group increases from 196 ueq/g to 240 ueq/g after ozone treatment. The adsorption capacity of benzene on activated carbon (AC) and on oxidized activated carbon (AO3) at various temperatures was decreased from 268 mg/g (10°C) to 179 mg/g(120°C) at AC and from 262 mg/g to 158 mg/g, at the same respective temperatures, for AO3. The results show that reaction temperature has a greater effect on AO3 than on AC. According to fa...