二氧化碳在双极膜电渗析系统中溶解吸收过程的研究

doi:10.19964/j.issn.1006-4990.2021-0356

Abstract

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 CO₃^2- and CaCO₃ would be reduced.With the increase of current density in electrodialysis unit,the generation rate of HCO₃^-,CO₃^2- 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

CLC Number:

TQ127.12

Zhao Yixin,Wu Mengfan,Wang Jianhang,Zhao Yingying. Study on process of CO₂ dissolution and absorption in bipolar membrane electrodialysis system[J]. Inorganic Chemicals Industry, 2022, 54(4): 104-111.

Figures/Tables 14

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References 23

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实验编号	体系	通气流量 / （L·h^-1）	CO₂体积分数/%	SO₂体积分数/%	电流密度/ （A·m^-2）	液体循环流量/ （L·h^-1）	是否添加晶种
1	纯CO₂	6	100	—	12.5	60	否
2	纯CO₂	6	100	—	12.5	60	是
3	模拟烟道气	60	10	0.5	12.5	60	是
4	模拟烟道气	30	10	0.5	12.5	60	是
5	模拟烟道气	40	10	0.5	12.5	60	是
6	模拟烟道气	50	10	0.5	12.5	60	是
7	模拟烟道气	80	10	0.5	12.5	60	是
8	模拟烟道气	60	10	0.5	10.0	60	是
9	模拟烟道气	60	10	0.5	15.0	60	是

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Inorganic Acid-Base-Salt Committee of CIESC

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

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