Water-resistant CO2-selective Absorbents

CO2 Absorbents/Releasing Agents are effective technologies for reducing CO2 gas in various environments such as global environments and manned space station. Generally, amine absorbents are known to absorb water vapor simultaneously with absorption of CO2. Herein we found that alkylamine with the hydrophobic phenyl group such as meta-xylylenediamines (MXDA) absorbed CO2 selectively in air without any hydration. The MXDA-CO2 complex could release dry CO2 at 103�120 �C easily, and dry high purity CO2 could be applied to the chemical reactions. In addition, removing co-absorption of water has reduced energy consumption of absorbent regeneration applications.