Activated carbon material is considered as a promising porous motif for the adsorption and storage applications. Activated carbon materials were prepared from biomass (gelatin and starch) by employing the dry chemical activation, possessing relatively high surface areas from 1636 to 1957 m2 g1 and abundant micropores with a pore size ca. 1.95 nm. A remarkably high CO2 adsorption (7.49 mmol g1 at 0 C and 1 bar) for GSK1-700 was recorded, that might be attributed to the unique microstructure and introduction of oxygen and nitrogen functionalities by superficial treatment. ACs showed good idealselectivities for CO2/N2 (52–98). The heat of adsorption was determined by CO2 adsorption, while themorphology was observed by FE-SEM and F-TEM, and chemical compositions of the as-preparedactivated carbons were analyzed via elemental analysis, XPS and FT-IR spectra.