It is significant to recover CO2 from industrial tail gases.Adsorption of low concentration benzene on activated carbon was studied.Activated carbon was treated with wet oxidized reagent and N2 reduction.Pore structure of modified activated carbon was characterized by N2(77 K) adsorption isotherm.Boehm titration,Fourier transform infrared spectroscopy(FTIR) were used to characterize the surface properties.N2 reduction increased the surface area of AC and total pore volume,reduced the amount of surface groups and improved benzene adsorption.With CO2 regeneration at 150℃,the capability of activated carbon adsorbents had a little decrease at the beginning but remained unchanged with recycling.
