화학기상증착법에 의하여 기공이 제어된 활성탄소펠렛의 CO₂/CH₄ 가스 분리능 향상 = Improving CO₂/CH₄ Gas Separation Capability of Pore Controlled Activated Carbon Pellets through Chemical Vapor Deposition

다국어 초록 (Multilingual Abstract)

Technologies that separate and capture CO₂ from landfill gas are attracting attention as a way to reduce CO₂ emitted into the atmosphere. In this study, we aimed to improve the gas separation ability of CO₂/CH₄ mixed gas by controlling the pores of activated carbon pellets (ACPs) through chemical vapor deposition of CH₄ and also investigated the adsorption characteristics as a function of reaction time. Both the specific surface area and the micropore volume increased up to a maximum of 997.8 m²/g and 0.392 cm³/g, respectively, following the carbon deposition through CH₄. In addition, the CO₂ adsorption quantity increased up to a maximum of 97.4 cm³/g as the deposition time increased. As a result, the pore structure of the ACPs could be controlled via the chemical vapor deposition of CH₄ and the ACPs' CO₂/CH₄ gas separation performance was improved. The improved CO₂ adsorption capacity was ascribed to an increase in specific surface area by heat treatment and an increase in the volume of below 0.61 nm micropores due to carbon deposition.