Enhancement of carbon dioxide absorption into aqueous potassium carbonate by adding amino acid salts

Abstract

Abstract Increasing carbon dioxide emissions in the environment is a universal matter that needs a decisive resolve so as to moderate the developing risk of climate alter. Numerous studies have been conducted over the closing few decades to solve this issue. In this study, aqueous potassium carbonate (K2CO3) solution promoted by amino acid salts were applied for absorbing carbon dioxide from gas mixture in a packed column. The experiments were achieved at atmospheric pressure and working temperature of 298 K using mixed gas consists of 15 vol% of carbon dioxide and 85 vol% nitrogen gas. While, the experiments of desorption were conducted at working temperature of 363 K. The absorption performance of 30 wt% (1 M) K2CO3 solution after adding 10 vol% of different amino acid salts solution [Glutamine salt (Glns), Glutamic acid salt (Glus), Tryptophan salt (Trps), Methionine salt (Mets) and Tyrosine salt (Tyrs)] was evaluated. It was found that adding amino acid salts solution as promoter to K2CO3 solution increases the absorption rate and enhances all other solvent properties.