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

查看全文 作　　者：Siming [1]Chen;Yue [2]Wu;Geoffrey [2]WStevens;Guoping [2]Hu;Wenshou [1]Sun;Kathryn [2]AMumford

机构地区：[1]College of Environmental Sciences and Engineering,Qingdao University,Qingdao 266071,China;[2]Peter Cook Centre for Carbon Capture and Storage Research(PCC),Particulate Fluids Processing Centre(PFPC),Department of Chemical Engineering,University of Melbourne,Parkville,Victoria 3010,Australia

出　　处：《Frontiers of Chemical Science and Engineering》索引2020年第14卷第3期,共10页

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). 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−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 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 addition.However,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. 关键词：CRYSTALLIZATION PRECIPITATION GLYCINATE FBRM 13C NMR

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

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