文献类型：期刊文献

英文题名：Impurity ions effect on CO₂ mineralization via coupled reaction-extraction-crystallization process of CaCl₂ waste liquids

作者：Dong, Chunhua[1];Song, Xingfu[1];Li, Yunzhao[1,2];Liu, Chenglin[1];Chen, Hang[1];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]Wanhua Chem Grp Co Ltd, Tianshan Rd 17, Yantai 264006, Peoples R China

年份：2018

卷号：27

起止页码：115

外文期刊名：JOURNAL OF CO2 UTILIZATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000445035500013)】；

基金：The authors are greatly thankful to the National Key R&D Program of China (No. 2018YFB0605703), National Natural Science Foundation of China (No. U1607115) and China Postdoctoral Science Foundation (No. 2017M621387) for financial support.

语种：英文

外文关键词：Impurity ions effect; CO2 mineralization; Morphology; Calcium carbonate; Distiller waste

摘要：The CaCl2-rich distiller waste discharged in the Solvay process has not been recycled comprehensively. A novel CO2 mineralization route with waste CaCl2 solutions via coupled reaction-extraction-crystallization technique was proposed. The effect of Na+, K+, Mg2+, Al3+, NO(3)(- )and SO42- ions which exist in the distiller waste on the conversion of CaCl2 as well as the morphology of product CaCO3 was studied with the aid of titration, Scanning Electron Microscope (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Particle Size Analyzer, X-ray Diffractometer (XRD), Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) and Thermogravimetry (TG). Among the ions, Na+, K+ and NO(3)(- )have little influence that could be ignored. Both Al3+ and SO42- are adsorbed on the surface of vaterite and inhibit the transformation to calcite by lowering down the surface energy. Therefore, small particles with diameters of less than 10 mu m even 1 mu m which are hard to be filtered are formed. While for Mg2+, the effect is negligible when the content is less than 5 wt %. However, as the content increases, Mg2+ could not only be adsorbed on the surface but also insert into the crystal lattice of CaCO3, forming the worm-like Mg-calcite. Finally, the experiment of simulated distiller waste was investigated to take a very important step towards industrialization.