AUTHOR=Calvo-Muñoz Elisa M. , García-Mateos Francisco J. , Rosas Juana M. , Rodríguez-Mirasol José , Cordero Tomás TITLE=Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions JOURNAL=Frontiers in Materials VOLUME=3 YEAR=2016 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2016.00023 DOI=10.3389/fmats.2016.00023 ISSN=2296-8016 ABSTRACT=

A series of porous carbon materials obtained from biomass waste have been synthesized, with different morphologies and structural properties, and evaluated as potential adsorbents for CO₂ capture in post-combustion conditions. These carbon materials present CO₂ adsorption capacities, at 25°C and 101.3 kPa, comparable to those obtained by other complex carbon or inorganic materials. Furthermore, CO₂ uptakes under these conditions can be well correlated with the narrow micropore volume, derived from the CO₂ adsorption data at 0°C (VDRCO2). In contrast, CO₂ adsorption capacities at 25°C and 15 kPa are more related to only pores of sizes lower than 0.7 nm. The capacity values obtained in column adsorption experiments were really promising. An activated carbon fiber obtained from Alcell lignin, FCL, presented a capacity value of 1.3 mmol/g (5.7%wt). Moreover, the adsorption capacity of this carbon fiber was totally recovered in a very fast desorption cycle at the same operation temperature and total pressure and, therefore, without any additional energy requirement. Thus, these results suggest that the biomass waste used in this work could be successfully valorized as efficient CO₂ adsorbent, under post-combustion conditions, showing excellent regeneration performance.