Journal article

Precipitation study of CO2-loaded glycinate solution with the introduction of ethanol as an antisolvent

Siming Chen, Yue Wu, Geoffrey W Stevens, Guoping Hu, Wenshou Sun, Kathryn A Mumford

Frontiers of Chemical Science and Engineering | Springer Verlag | Published : 2020

Abstract

Focused beam reflectance measurement (FBRM) and 13C nuclear magnetic resonance (13C NMR) analysis were used to study the precipitation process of CO2-loaded potassium glycinate (KGLY) solutions at different CO2 loadings, during the addition of ethanol as an antisolvent at a rate of 10 mL·min−1. The volume ratio of ethanol added to the KGLY solution (3.0 mol·L−1, 340 mL) ranged from 0 to 3.0. Three solid-liquid-liquid phases were formed during the precipitation process. The FBRM results showed that the number of particles formed increased with CO2 loading and ethanol addition for CO2-unsaturated KGLY solutions, whilst for CO2-saturated KGLY solution it first increased then decreased to a stab..

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