Highly porous activated carbon materials from carbonized biomass with high CO2 capturing capacity

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 m(2) g(-1) and abundant micropores with a pore size ca. 1.95 nm. A remarkably high CO2 adsorption (7.49 mmol g(-1) at 0 degrees 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 ideal selectivities for CO2/N-2 (52-98). The heat of adsorption was determined by CO2 adsorption, while the morphology was observed by FE-SEM and F-TEM, and chemical compositions of the as-prepared activated carbons were analyzed via elemental analysis, XPS and FT-IR spectra. (C) 2015 Elsevier B.V. All rights reserved.