文献类型：期刊文献

英文题名：Gas-Liquid Reactive Crystallization of Lithium Carbonate by a Falling Film Column

作者：Sun, Yu-Zhu[1];Song, Xing-Fu[1];Jin, Miao-Miao[1];Jin, Wang[1];Yu, Jian-Guo[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：52

期号：49

起止页码：17598

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20135117115442);WOS:【SCI-EXPANDED(收录号:WOS:000328438800029)】；

基金：This work was financially supported by the National High Technology Research and Development Program of China (863 Program, No. SS2012AA060701), Doctoral Fund of Ministry of Education (No. 20120074120013), Technology Innovation Action Plan of Shanghai (No. 11dz1205502), and the Open Project of State Key Laboratory of Chemical Engineering (No. SKL-ChE-11C03).

语种：英文

外文关键词：Reynolds number - Particle size - Particle size analysis - Liquid films

摘要：The gas-liquid reactive crystallization process of CO2 gas and LiOH solution was systematically studied by a falling film column to prepare Li2CO3 crystals. Three important parameters concerning the fluid dynamic characteristics of the falling film column were obtained: the Reynolds number, the falling film thickness, and the exposure time. Li2CO3 is the intermediate product during the reactive absorption process, and the final pH of the solution should be controlled within the range of 9.0-9.5 to achieve high product yields. The effects of operating variables on the absorption rate, crystallization rate, and particle size distribution were experimentally explored and theoretically analyzed. Results showed that higher temperatures and LiOH concentrations significantly enhance reactants utilities. A novel method was adopted to quantitatively describe the interaction between absorption and crystallization, and results proved that the crystallization process promotes the transport of CO32- ions from the interfacial liquid film to the bulk solution and, thus, facilitates the overall absorption process. Product characterizations were performed by SEM, XRD, and ICP-MS.