Corrosion behavior and mechanisms of carbon steel in Cu(II)-amine based solvents for electrochemically mediated CO2 capture system
发布时间：2026-03-06
点击次数：
- 发布时间：
- 2026-03-06
- 影响因子：
- 13.2
- DOI码：
- 10.1016/j.cej.2026.173702
- 论文名称：
- Corrosion behavior and mechanisms of carbon steel in Cu(II)-amine based solvents for electrochemically mediated CO2 capture system
- 发表刊物：
- CHEMICAL ENGINEERING JOURNAL
- 摘要：
- Electrochemically Mediated Amine Regeneration (EMAR) carbon capture technology offers an energy-efficient and cost-effective alternative to traditional thermal-driven absorption methods attributed to its capability to utilize renewable energy and operate under ambient conditions. However, the corrosion susceptibility of carbon steel in Cu(II)-amine solvents poses critical challenges to EMAR system durability and economic viability. This work systematically evaluated the corrosion mechanisms of carbon steel in the Cu(II)-monoethanolamine (MEA) and Cu(II)-ethylenediamine (EDA) based solvents through four-dimensional comprehensive test: corrosion potential analysis (thermodynamic evaluation), electrochemical impedance spectroscopy (kinetic evaluation), weight-loss tests (macro-scale practical testing), and morphological characterization (microscopic perspective). Results reveal that in CO2-free solutions, corrosion reactions predominantly mediated by organic amine molecules exhibit weaker activity, whereas under CO2-saturated conditions, protonated amine and bicarbonate ionsdominated corrosion processes undergo significant intensification, leading to severe damage to the carbon steel surface. However, the introduction of cupric ions (Cu2+) substantially reduces the corrosion tendency regardless of CO2 saturation status. Both the MEA and EDA based solutions follow the same trend, despite EDA exhibiting a higher overall corrosivity. In the Cu(II)-MEA and Cu(II)-EDA system, the carbon steel surface remains smooth, with a corrosion rate below 0.0041 mm/year, demonstrating a reduction exceeding 90% compared to traditional chemical absorption systems (corrosion rate > 0.0662 mm/year). The findings highlight the superior corrosion mitigation capability of the EMAR-CO2 capture system compared to traditional CO2 chemical absorption methods, providing critical insights for the practical application of EMAR-CO2 capture technology.
- 论文类型：
- 期刊论文
- 通讯作者：
- 吴小梅
- 文献类型：
- J
- ISSN号：
- 1385-8947
- 是否译文：
- 否
- 发表时间：
- 2026-02-15
- 收录刊物：
- SCI、SCI