Abstract
Vapor–liquid equilibrium (VLE) measurements were conducted for both unloaded and CO 2 loaded aqueous amine amino acid salt (AAAS) solutions; 3-(methylamino)propylamine/sarcosine (SARMAPA). Vapor–liquid equilibrium for unloaded solutions for 1.0–5.0 M SARMAPA were measured using a Swietoslawski ebulliometer for temperatures 40–100 °C and for total pressures 4.08–99.1 kPa. CO 2 equilibrium was determined for loaded 5 M SARMAPA using low and high temperature VLE apparatuses from 40 to 120 °C. A thermodynamic model representing equilibrium in the H 2O–AAAS–CO 2 system was developed using the extended UNIQUAC thermodynamic framework. The developed model predicts simplified speciations in H 2O–SARMAPA–CO 2 system and adequately correlates the experimental total and partial pressure data with an average absolute deviation of 8.9%.
Published Version
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