The increasing demand for efficient carbon capture technologies has driven the development of advanced solvent systems capable of overcoming the limitations of traditional aqueous and water-lean amine solutions. This study introduces a novel liquid-phase absorption system that combines a chemisorption component with a solvent, resulting in a unique absorption mechanism that enhances CO₂ binding capacity. Experimental results demonstrate a CO₂ uptake of >0.8 mol CO₂/mol amine, significantly surpassing the performance of conventional water-lean amine systems. Dynamic breakthrough experiments further validate the system's effectiveness across a range of CO₂ concentrations (4.5–25%), confirming stable cyclic operation and efficient CO₂ removal. Mechanistic insights were obtained through 13CO₂ NMR and FTIR spectroscopy, which revealed the key solvent-amine-CO₂ interactions governing the absorption process.This system offers several advantages over existing technologies, including higher working capacity, reduced energy consumption for regeneration, less solvent loss during regeneration and compatibility with industrial CO₂ capture processes. These features make it particularly suitable for applications in post-combustion flue gas treatment and blue hydrogen production, where high CO₂ concentrations (10–25%) are prevalent. The talk will cover our experimental findings, spectroscopic evidence of the absorption mechanism, and highlight the potential of tailored solvent-amine interactions to optimize CO₂ capture performance.
