New strategy to enhance CO₂ capture over a nanoporous polyethylenimine sorbent

A study was conducted to propose a new strategy to enhance CO₂ capture over a nanoporous polyethylenimine sorbent. It was demonstrated that only 1 mol of amine sites was needed to sorb 1 mol of CO₂ in the presence of K₂CO₃. It was observed that as a result of this, the amine efficiency could be doubled theoretically and CO₂ capture capacity could be enhanced. Sorbents developed in this cost-effective method provided great potential to capture CO₂ more efficiently and had a major impact on the advancement of current CCUS technologies. Fumed silica was used as a support to demonstrate the success of the proposed strategy for CO₂ capture enhancement.