기능성 바이오차 생산을 위한 이산화탄소의 영향 평가

Abstract

To abate the environmental burdens arising from CO2 emissions, biochar offers a strategic means to sequester carbons dueto its recalcitrant nature. Also, biochar has a great potential for the use as carbon-based adsorbent because it is a porousmaterial. As such, developing the surface properties of biochar increases a chance to produce biochar with great adsorptionperformance. Given that biochar is a byproduct in biomass pyrolysis, characteristics of biochar are contingent on pyrolysisoperating parameters. In this respect, this work focused on the investigation of surface properties of biochar by controllingtemperature and reaction medium in pyrolysis of pine sawdust as case study. In particular, CO2 was used as reactionmedium in pyrolysis process. According to pyrolytic temperature, the surface properties of biochar were indeed developedby CO2. The biochar engineered by CO2 showed the improved capability on CO2 sorption. In addition, CO2 has an effecton energy recovery by enhancing syngas production. Thus, this study offers the functionality of CO2 for convertingbiomass into engineered biochar as carbon-based adsorbent for CO2 sorption while recovering energy as syngas.