文献类型：期刊文献

英文题名：Removal of heat-stable salts from lean amine solution using bipolar membrane electrodialysis

作者：Zhou, Zhiwei[1];Lin, Yuqing[1];Jin, Yan[1];Guan, Kecheng[2];Matsuyama, Hideto[2];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn & Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe, Hyogo 6578501, Japan

年份：2022

卷号：645

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20220111423713);WOS:【SCI-EXPANDED(收录号:WOS:000791996400003)】；

基金：Acknowledgements This work was sponsored by Shanghai Sailing Program (20YF1409500) , China Postdoctoral Science Foundation (2021T140206, 2021M691010) , PetroChina Innovation Foundation (2020D-5007-0502) , and Fundamental Research Funds for the Central Universities (50321022017008) .

语种：英文

外文关键词：Lean amine solution; Bipolar membrane electrodialysis; Heat-stable salt separation; Current efficiency; Energy consumption

摘要：Traditional resin exchange processes for the removal of heat-stable salt (HSS) from lean amine solutions have limited efficiency, and require large amount of alkali for regeneration, causing a serious negative impact on the sustainable environmental development. In this study, a new bipolar membrane electrodialysis (BMED) process was proposed to replace the original resin-based method for the removal of HSS from practical lean amine liquids (from a natural gas factory of PetroChina Company). The experimental conditions of current density, volumetric ratio, HSS concentration, and etc., were systematically investigated. It was found that a high HSS removal efficiency of up to 95.7% with an extremely low loss rate of the organic amine of down to 1.39% can be obtained, under the optimal current density of 60 mA/cm(2). A continuous operation verified the long-term stability of BMED for a high-efficiency HSS removal rate of up to 80.3% after a 600-h duration. From the findings in this study, we develop a conceptual exploration describing the BMED process for the separation of HSS from practical desulfurization wastewater, beyond the lean amine liquids, offering a guidance for their potential industrial applications.