文献类型：期刊文献

英文题名：On-line monitoring of lithium carbonate dissolution

作者：Sun, Yuzhu[1];Song, Xingfu[1];Wang, Jin[1];Luo, Yan[1];Yu, Jianguo[1]

机构：[1]E China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China

年份：2009

卷号：44

期号：11

起止页码：1223

外文期刊名：CRYSTAL RESEARCH AND TECHNOLOGY

收录：;EI(收录号：20094412416393);WOS:【SCI-EXPANDED(收录号:WOS:000271788300007)】；

基金：This work was financially supported by Shanghai Leading Academic Discipline Project (No. B506) and Program for New Century Excellent Talents in University (NCET-08-0776).

语种：英文

外文关键词：lithium carbonate; dissolution kinetics; FBRM; PVM; PBE

摘要：Dissolution of lithium carbonate (Li2CO3) in aqueous solution was investigated using three on-line apparatuses: the concentration of Li2CO3 was measured by electrical conductivity equipment; CLD (Chord Length Distribution) was monitored by FBRM (Focused Beam Reflectance Measurement); crystal image was observed by PVM (Particle Video Microscope). Results show dissolution rate goes up with a decrease of particle size, and with an increase in temperature; stirring speed causes little impact on dissolution; ultrasound facilitates dissolution obviously. The CLD evolution and crystal images of Li2CO3 powders in stirred fluid were observed detailedly by FBRM and PVM during dissolution. Experimental data were fitted to Avrami model, through which the activation energy was found to be 34.35 kJ/mol. PBE (Population Balance Equation) and moment transform were introduced to calculate dissolution kinetics, obtaining correlation equations of particle size decreasing rate as a function of temperature and undersaturation. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim