Thermally reversible polymeric sorbents for acid gases: CO₂, SO₂, and NOx

Weakly acidic gases such as CO 2 , SO 2 , NO 2 , and NO discharged directly into the atmosphere have been suggested to contribute to the formation of acid rain and to global climate changes. In an effort to develop an effective process by which to remove these pollutants from gas streams, we synthesized polymeric sorbents that bind acid gases. In an earlier work, we reported that polymers carrying pendant amine groups are capable of absorbing carbon dioxide to form thermally reversible amine/CO 2 addition products. In this study, we investigated the effects of amine structure on acid gas sorption and the thermal reversibility of the sorption–desorption reactions of various acid gases including CO 2 , SO 2 , NO, and NO 2 with both linear and cross‐linked polymers using thermogravimetric analysis.