In situ Fourier Transform-Infrared (FT-IR) analysis of carbon dioxide absorption and desorption in amine solutions

摘要

The chemical reactions involved in CO_2 absorption and desorption by chemical absorbents such as aqueous amines are being investigated and modelled to identify and make potential improvements in efficiency. Recent advances in FT-IR spectroscopy have allowed for convenient and rapid analysis of chemical species to be carried out in an aqueous environment. This paper presents the findings of an investigation of carbon dioxide absorption and desorption into/from amine solutions. The amines investigated, including primary capture solvents (eg. MEA) as well as promoters (eg. MDEA), have been selected to demonstrate that both carbamate and carbonate formation can be monitored using this technique. New insights into a much applied but little understood industrial chemical process have been revealed.