This study investigates the production of molecular sieving carbon (MSC) from reed biomass through carbonization and evaluates its pore structure and gas separation performance for CO₂-CH₄ and propylene-propane systems. Reed powder was carbonized under nitrogen at temperatures between 400 and 900℃. Up to 600℃, pore diameters increased and distributions broadened due to volatile release. Above 600℃, the formation of polycyclic aromatic structures resulted in smaller pore diameters and narrower distributions. For CO₂-CH₄ separation, char obtained at 800℃ exhibited an adsorption rate ratio (CO₂/CH₄) of approximately 20, indicating the potential for rate-based separation. In the propylene-propane system, char carbonized at 800℃ selectively adsorbed propylene, enabling equilibrium-based separation, while char at 600℃ achieved an adsorption rate ratio (propylene/propane) of approximately 30, suggesting rate-based separation capability.
Hayashi et al. (Mon,) studied this question.