文献类型：期刊文献

英文题名：High mixing enhancement for continuous uniformity Li/Al-LDHs in lithium extraction from low grade salt lakes

作者：Pan, Yanan[1,2];Tao, Haolan[3];Su, Haiping[3];Liu, Chenglin[1,4];Yu, Jianguo[1];Lin, Sen[1,4]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]Virginia Polytech Inst & State Univ, Dept Min & Minerals Engn, Blacksburg, VA 24061 USA;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

年份：2025

卷号：354

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20243516930720);WOS:【SCI-EXPANDED(收录号:WOS:001301391100001)】；

语种：英文

外文关键词：Continuous high mixing reactor; Uniform Li/Al-LDHs; CFD modeling; Low grade salt lake; Lithium adsorption

摘要：The enhancement of lithium extraction from low grade salt lake through the development of advanced adsorbents has become a primary focus in current research. A new method was developed in this work for the continuous fabrication of ultra-highly uniform lithium-aluminum layered double hydroxides (H-LDHs), used as lithium adsorbents, through a high mixing reactor. These H-LDHs featured a more consistent particle size distribution, which facilitated an enhanced vibrational density. This not only significantly increased the powder content in granules but also improved lithium adsorption efficiency. Computational fluid dynamics (CFD) modeling showed that the reactor reached peak mixing efficiency with a minimal gap size of 1 mm. The analysis further indicated that a Reynolds number of 75 led to enhanced mixing effects and stronger flow dynamics. Experiments with Qarhan salt lake brine demonstrated that the H-LDHs powders reached a lithium adsorption capacity of up to 7.27 mg/g, while the volumetric adsorption capacity of these H-LDHs granules exceeded that of traditional granules by 1.179 times. Subsequent desorption and cycling experiments verified the material's enduring lithium adsorption efficacy and structural integrity, underscoring its considerable potential for industrial use.