CO2 adsorption by cryogels produced from poultry litter wastes

Abstract

Poultry litter waste (PLW) is the main by-product generated by the Brazilian poultry industry. A sustainable approach for reusing this waste is the production of biochar to be further used aiming CO 2 adsorption. In this work, biochars were produced by varying the N 2 flow along the pyrolysis process of 150 (PLW-150) and 1000 (PLW-1000) mL min -1 . PLW and biochars were characterized for their morphology, porosity, specific surface area, and CO 2 adsorption capacity. From the biochars, carbon cryogels (CC) were produced aiming their use as CO 2 adsorbents. The results of the cryogel adsorption test showed a CO 2 adsorption capacity of 13.1±2.9 and 33.8±3.3 mg g -1 for the CC-PLW.150 and CC-PLW.1000 cryogels, respectively. Therefore, reusing this residue for cryogels production and its use in the CO 2 adsorption signifies an attractive perspective to minimize the environmental damage caused by CO 2 emissions.