Relevance of wood biochar on CO2 adsorption: A review

Anthropogenic CO2 emissions are indeed escalating as a consequence of the expanding global energy demand, emphasizing the significance of CO2 capture, where carbon capture and sequestration have been deemed to be the most efficacious approach for alleviating CO2 emissions. Multiple technologies have been devised to capture CO2, and current research is primarily aimed at improving CO2 adsorption on wood biochar, a carbonaceous substance derived from wood-based feedstock. Activation, metal doping, and surface group functionalization are some of the modification strategies being ultimately employed to enhance the adsorbent's effectiveness. The review also provides an insight into various Wood biochar production techniques moreover the adsorbent effectiveness assessment through a variety of isotherm and kinetic modeling techniques is also incorporated. This study summarizes different parameters like specific surface area (0.01- 1408.8 ​m2/g), pore volume (0.1-0.85 ​cm3/g), ash content (2.02-48.0%), and functional groups that stand as criteria for evaluating the adsorption ability of biochar. The CO2-adsorbed wood biochar employment as a sort of soil enhancer, feedstock material for biofuel, as well as the technique for warming up the building basement during frigid climates, is delineated as a roadmap leading to future aspects.