无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2022, Vol. 54 ›› Issue (4): 104-111.doi: 10.19964/j.issn.1006-4990.2021-0356

• 研究与开发 • 上一篇    下一篇

二氧化碳在双极膜电渗析系统中溶解吸收过程的研究

赵一欣1(),吴梦凡1,4,王建行1,赵颖颖1,2,3()   

  1. 1.河北工业大学化工学院,天津 300130
    2.海水资源高效利用化工技术教育部工程研究中心
    3.河北省现代化工海洋化工协同创新中心
    4.中国电子系统工程第四建设有限公司
  • 收稿日期:2021-05-31 出版日期:2022-04-10 发布日期:2022-04-18
  • 作者简介:赵一欣(2000— ),女,研究生在读,研究方向为海水化学资源利用与矿化固碳;E-mail: luckyzyx001@163.com
  • 基金资助:
    天津市自然科学基金重点项目(20JCZDJC00450);河北省自然科学基金青年项目(B2020202029);河北工业大学基础科研业务费(JBKYTD2001)

Study on process of CO2 dissolution and absorption in bipolar membrane electrodialysis system

Zhao Yixin1(),Wu Mengfan1,4,Wang Jianhang1,Zhao Yingying1,2,3()   

  1. 1. School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China
    2. Engineering Research Center of Seawater Utilization,Ministry of Education
    3. Hebei Collaborative Innovation Center of Modern Marine Chemical Technology
    4. The Fourth Construction CO.LTD of China Electronics System Engineering
  • Received:2021-05-31 Published:2022-04-10 Online:2022-04-18

摘要:

在二氧化碳捕集、利用和封存(CCUS)技术中,海水固碳技术绿色环保、安全可靠,具有很好的发展前景。其中,双极膜电渗析法海水固碳技术的关键之处在于二氧化碳在系统中的溶解吸收。考察了结晶器中添加晶种、通气体系成分、模拟烟道气流量、双极膜电渗析装置的电流密度对海水固碳过程中二氧化碳溶解吸收效果的影响,结果表明:系统外加晶种、模拟烟道气作为通气体系时更有利于二氧化碳在双极膜电渗析系统中的溶解吸收,促进碳酸钙生成。在上述基础上,随着模拟烟道气流量的增加,二氧化碳的比吸收速率降低,二氧化碳在溶液中大部分转化成碳酸氢根,碳酸根和碳酸钙的生成速率则会降低;随着电渗析装置电流密度的提高,碳酸氢根、碳酸根和碳酸钙的生成速率均会随之提高。该研究为酸性气体在双极膜电渗析系统中溶解吸收和矿化利用提供了指导。

关键词: 海水固碳, CO2溶解吸收, 双极膜电渗析系统, 水解离

Abstract:

Seawater carbon sequestration technology is considered as a green,environmental-friendly,safe and reliable technology among CO2 capture,utilization and storage(CCUS) technologies,which has good development prospects.The key of seawater carbon sequestration technology is the dissolution and absorption of CO2 in the bipolar membrane electrodialysis system.The influence of seeding in the crystallizer,the composition of the ventilation system,the simulated flue gas flow and the current density of the bipolar membrane electrodialysis device on the CO2 dissolution and absorption effect was investigated.It was found that the external crystal seeds and the simulated flue gas was beneficial to the dissolution and absorption of CO2 in the bipolar membrane electrodialysis system,promoting production of CaCO3.Based on the above,with the increase of simulated flue gas flow,the specific absorption rate of CO2 was decreased,and most of CO2 in the solution was converted into HCO3-,while the generation rate of CO32- and CaCO3 would be reduced.With the increase of current density in electrodialysis unit,the generation rate of HCO3-,CO32- and CaCO3 was increased accordingly.This study provided a guidance for the application of acid gas in dissolution,absorption and mineralization in bipolar membrane electrodialysis system.

Key words: seawater carbon sequestration, CO2 dissolution and absorption, bipolar membrane electrodialysis system, water dissociation

中图分类号: