“…Park and Meng reported that the preparation of nanoporous carbon electrode with high specific surface area (1210 m 2 g À1 ) from a weak acrylic ion exchange resin by the carbonization of a mixture with Mg citrate at different ratios for electric double layer capacitor [16]. MgO template method has several advantages over the other methods such as easily removed by a diluted non-corrosive acid, MgO template can be recycled for the preparation of porous carbons, and the pore size and volume of mesopores are tunable by changing MgO precursor and carbon precursor [16]. However, MgO template method has a limit to the suitable pore size for CO 2 adsorption because of the pore size of the prepared nanoporous carbons is higher than 2 nm.…”