文献类型：期刊文献

英文题名：Enabling separation intensification of a lanthanide pair with closely similar kinetics based on droplet microfluidics: hydrodynamic and kinetic approaches

作者：Zhang, Hao[1,3];Wang, Huizhi[2];Xu, Hong[4];Zhang, Li[4];Xuan, Jin[3]

机构：[1]Jiangxi Univ Sci & Technol, Sch Mech & Elect Engn, Ganzhou, Peoples R China;[2]Imperial Coll London, Dept Mech Engn, Exhibit Rd,South Kensington Campus, London, England;[3]Loughborough Univ, Dept Chem Engn, Loughborough, Leics, England;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai, Peoples R China

年份：2019

卷号：4

期号：8

起止页码：1410

外文期刊名：REACTION CHEMISTRY & ENGINEERING

收录：;EI(收录号：20193007231681);WOS:【SCI-EXPANDED(收录号:WOS:000476769800014)】；

基金：The research work presented in this paper is supported by the Natural Science Foundation of Jiangxi Province, China (20181BAB216016, 20171BAB216023).

语种：英文

外文关键词：Kinetics - Rare earth elements - Mass transfer - Extraction - Metal ions - Hydrodynamics

摘要：Microfluidics has been proved a promising way for highly efficient lanthanide extraction and separation benefiting from the astounding mass transfer characteristics. Efforts have been devoted by us previously to provide a clear understanding of the separation intensification mechanism of lanthanide pairs with distinguished extraction kinetics in microfluidics, such as Eu3+/La3+. However, for those lanthanide pairs with closely similar extraction kinetics, the working principles of separation intensification are different, which could not be explained by our former proposed theory of nonequilibrium separation intensification. In this study, a numerical model considering nonlinear extraction kinetics was presented to comprehend the separation characteristics of Eu3+/Sm3+, a lanthanide pair with very similar extraction kinetics, in microfluidics. The hydrodynamic and kinetic approaches, i.e. flow rate, initial concentration of metal ions and extractant, pH and temperature, were studied to manipulate separation performance. Analyses on dimensionless number (Damkohler number) were conducted to unveil the working mechanism of such approaches. The numerical study provides a mechanistic understanding of lanthanide separation in microfluidics and offers manipulating principles for further optimization.