CO2 capture via adsorption in amine-functionalized sorbents

Amine functionalized solid adsorbents are promising materials for the capture of CO 2 because of their tunability and lower heat capacity compared to liquid amine solutions. This review focuses on recent advances in the use of solid-supported amines for CO 2 capture, with emphasis on amine functionalized metal organic framework (MOF) materials. The recently reported diamine functionalized Mg-DOBPDC MOF demonstrates intriguing performance for CO 2 capture, offering a unique adsorption mechanism with favorable energetics. Stable performance for CO 2 capture under humid conditions and easy regenerability of the adsorbent are critical to the realization of practical CO 2 adsorbents. Scalable regeneration methods such as temperature swing in a CO 2 purge stream and temperature swing via steam stripping are discussed. Emerging gas-solid contacting strategies for CO 2 capture with amine adsorbents are also discussed.