Development of Alkyl-Functionalized New Polyamine Based Non-Aqueous Solvent for Energy Efficient CO2 Capture

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This project, new isopropyl-functionalized polyamine (IPFPA) based non-aqueous solvent (NAS) was developed for the recovery of CO2 from post-combustion flue gases that will achieve a significant increase in CO2 capture performances with a reduction of solvent regeneration energy. A total of 10 new (Generation II) IPFPA(s) was synthesized with high purity (>98%) and excellent yield (>96%) during this project. The NAS system was made by mixing IPFPA as absorbent and commercially available alcohol/non-alcohol as solvent. Last year the optimization of all synthesized polyamine completed. This year 5 alcohol solvents and 5 non-alcohol solvents screening experiments was completed with the best IPFPA performer. Isopropyl functionalized polyamine IP-DMDPTA was identified as best polyamine and 1-methylimidazole (1MIm) was identified as best organic solvent. (IP-DMDPTA+1MIm) based NAS was optimized, thoroughly measuring all relevant properties, and identified their best composition which give high CO2 absorption rate, high cyclic amount of CO2, and consume the minimal amount of heat energy.