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

作     者：Siming Chen Yue Wu Geoffrey WStevens Guoping Hu Wenshou Sun Kathryn AMumford Siming Chen;Yue Wu;Geoffrey W.Stevens;Guoping Hu;Wenshou Sun;Kathryn A.Mumford

作者机构：College of Environmental Sciences and EngineeringQingdao UniversityQingdao 266071China Peter Cook Centre for Carbon Capture and Storage Research(PCC)Particulate Fluids Processing Centre(PFPC)Department of Chemical EngineeringUniversity of MelbourneParkvilleVictoria 3010Australia 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2020年第14卷第3期

页      面：415-424页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：The authors acknowledge the infrastructure support from the Particulate Fluids Processing Centre(PFPC) the Peter Cook Centre(FCC)for Carbon Capture and Storage(CCS) 

主　　题：crystallization precipitation glycinate FBRM 13C NMR 

摘      要：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−*** volume ratio of ethanol added to the KGLY solution(3.0 mol·L−1,340 mL)ranged from 0 to *** solid-liquid-liquid phases were formed during the precipitation *** 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 stable value with ethanol addition.13C NMR spectroscopic analysis showed that the crystals precipitated from the CO2-unsaturated KGLY solutions consisted of glycine only,and the quantity crystallised increased with CO2 loading and ethanol ***,a complex mixture containing glycine,carbamate and potassium bicarbonate was precipitated from CO2-saturated KGLY solution with the maximum precipitation percentages of 94.3%,31.4%and 89.6%,respectively,at the ethanol volume fractions of 1.6,2.5 and 2.3.