One CO2 removal method in development involves using amine-based material to capture CO2  from post-combustion and from the air. However, a significant challenge with this method is the degradation of the absorption material. This degradation not only shortens the material's lifetime but also releases unwanted chemicals into the atmosphere, raising both economic and environmental concerns. 

While understanding the degradation mechanism is crucial, progress has been hindered by the limitations of existing methods, such as X-ray diffraction and NMR, which only characterize the solid-phase material. To address this limitation, we deploy a Chemical Ionization Mass Spectrometer (CIMS) to provide online quantification of amines and their oxidation products in the gas-phase with high sensitivity and ppt-level-detection limit. 

Given the inherent connection between the formation of volatile products and the degradation of solid material, our approach provides insights into the degradation mechanism from a unique perspective. Additionally, the measurement of gas-phase degradation products enables the quantification of fugitive emissions into the atmosphere and evaluate their impacts on air quality, a currently poorly understood area. 

Overall, the research outcomes will enhance material design, lower costs, and quantify fugitive emissions, thereby advancing both technology development and environmental assessment. 

Related Publications:

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