The contribution of aqueous L-arginine salts to equilibrium carbon dioxide absorption in a co-promoter role at high pressure

Suleman, H. and Maulud, A.S. and Syalsabila, A. and Shahid, M.Z. (2020) The contribution of aqueous L-arginine salts to equilibrium carbon dioxide absorption in a co-promoter role at high pressure. Fluid Phase Equilibria, 524. ISSN 03783812

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Abstract

Salts of the basic amino acid L-arginine are potential co-promoters and blending components for the conventional solvents used in carbon dioxide-based separations. This study defines the contribution of arginine salts to equilibrium carbon dioxide absorption at co-promoter concentrations (less than 1 M) and high pressure. Experimentally determined carbon dioxide loadings in aqueous potassium and sodium salt solutions of L-arginine show a positive relationship with pressure (range: 110�4110 kPa); but a negative behaviour with an increase in temperature (range: 303.15�363.15K) and solvents concentrations (range: 0.25�0.75 M). The experimental results are correlated by the Kent-Eisenberg and the explicit models, with an average absolute deviation of 10.72 and 5.03, respectively. The regressed parameters of both models allow satisfactory estimation of the carbon dioxide loadings in arginine salt solutions at other process conditions. Comparison with piperazine and monoethanolamine shows that L-arginine salts have a better carbon dioxide absorption capacity at high pressure. © 2020 Elsevier B.V.

Item Type: Article
Additional Information: cited By 3
Uncontrolled Keywords: Arginine; Blending; Carbon dioxide process; Positive ions; Salts, Average absolute deviation; Basic amino acids; Carbon dioxide absorption; Carbon dioxide loadings; L-arginine salts; Monoethanolamine; Process condition; Satisfactory estimation, Carbon dioxide
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 10 Nov 2023 03:26
Last Modified: 10 Nov 2023 03:26
URI: https://khub.utp.edu.my/scholars/id/eprint/12436

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