Screening of the Amino Acid-Based Solvents for Carbon Dioxide Absorption

Post-combustion separation and capture of CO2 from flue gases resulting from the burning of fossil fuels is a challenging technique due to the low pressure and low concentration of carbon dioxide, the impurities in the flue gases and the cost of regenerating the absorber. Researchers have developed various CO2 capture technologies such as absorption, adsorption, and membrane separation cryogenic technology. Of these, absorption was the most widely used. A wide variety of organic and inorganic substances have been proposed as solvents for CO2 uptake. But, these solvents have some major disadvantage such as: low absorption rate for K2CO3 solutions, high energy consumption for the amine solutions, high volatility and toxicity of ammonia. These can be solved by using another selective solvent for carbon dioxide. This paper provides information available in the literature on current solvents and the potential for amino acid salts to be used as absorbent for CO2 capture