The emission of CO2 into the atmosphere has increased year after year causing global warming. To reduce the release of CO2 into the atmosphere, many researchers have tried to find new materials for effective carbon capture and storage (CCS). Up to date, hierarchical porous carbons are candidate materials for capturing CO2 gas at high pressure. In this study, hierarchical porous carbons with nitrogen functional groups based on polybenzoxazine precursor and template-assisted synthesis method were prepared. Their CO2 adsorption capability at high pressure was also investigated. An activated porous carbon derived from polybenzoxazine with 40wt% of silica, carbonized at 800°C, and activated at 900°C showed the highest specific surface area of 1391 m2/g with an extremely large pore volume of 3.77 cm3/g. It also exhibited an outstanding amount of CO2 uptake of 25.07 mmol/g, measured at 30°C and 40 bar. This is the highest value ever reported. The specific surface area and total pore volume play an important role in CO2 capture at high pressure (4 bar) but are insignificant at low pressure (1 bar). All results suggested that using polybenzoxazine as a carbon precursor, silica as a template, and activation process yields hierarchical porous carbon with high amount of nitrogen content, and that carbon is an excellent adsorbent for CO2 capture at high operating pressure.

High pressure CO2 adsorption on hierarchical porous carbon with n-functional group

2019 Spring National Meeting

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