Analysis of degradation pathways and corrosion characteristics of alcoholamine absorbents in CO₂ capture processes

Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (5): 34-37.

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Analysis of degradation pathways and corrosion characteristics of alcoholamine absorbents in CO₂ capture processes

Du Yannian, Wang Le, Ma Jun, Yang Yanjia, Wang Dong

1.Luoyang R&D Center of Technology of Sinopec Engineering (Group) Co., Ltd., Luoyang, Henan 471003; 2. Sinopec Science and Technology Ministry, Beijing 100728; 3. Sinopec Nanjing Research Institute of Chemical Industry Co., Ltd., Nanjing, Jiangsu 210048

Online:2025-05-15 Published:2025-05-22

CO₂捕集过程中醇胺吸收剂降解路径及腐蚀特性分析

杜延年，王乐，马骏，杨琰嘉，汪东

1.中国石化炼化工程（集团）股份有限公司洛阳技术研发中心，河南省洛阳市 471003；2. 中国石油化工股份有限公司科技部，北京市 100728；3. 中国石化南京化工研究院有限公司，江苏省南京市 210048

作者简介:杜延年，高级工程师，博士，研究方向为腐蚀与防护。E-mail：duyn.segr@ sinopec.com。
基金资助:
中国石化科技开发项目（323116）

Abstract

Abstract:

The alcoholamine CO₂ capture technology is widely used in the field of carbon reduction due to its high efficiency, economy, strong applicability, and simple process. However, the alcoholamine absorbent will undergo a certain degree of degradation during long-term cyclic use in the device, resulting in a series of problems such as decreased CO₂ capture efficiency, increased equipment corrosion and leakage risks, and increased operating costs. Taking monoethanolamine (MEA) and methyldiethanolamine (MDEA) as the research objects, the degradation pathways and the distribution of degradation products of thermal degradation, oxidative degradation, and chemical degradation of ethanolamine absorbent in the process of CO₂ capture are systematically combed. The corrosion characteristics of ethanolamine absorbent and degradation products are analyzed and summarized, and the corresponding degradation inhibition measures are put forward. The development and research of new ethanolamine absorbent in the future are prospected.

Key words: CO? capture, alcoholamine absorbent, thermal degradation, oxidative degradation, chemical degradation, heat stable salts, corrosion characteristics

摘要：

醇胺法CO₂捕集技术因其高效、经济、适用性强和工艺简单等优点，在碳减排领域应用广泛。然而醇胺吸收剂在装置内长周期循环使用过程中会发生一定程度的降解，导致装置的CO₂捕集效率下降、设备腐蚀泄漏风险增加和运行成本升高等一系列问题。以单乙醇胺（MEA）和甲基二乙醇胺（MDEA）为研究对象，系统梳理了CO₂捕集过程中醇胺吸收剂的热降解、氧化降解和化学降解等的降解路径及降解产物分布，对醇胺吸收剂及降解产物的腐蚀特性进行分析归纳总结，提出了相应的降解抑制对策，并对未来新型醇胺吸收剂的开发研究进行了展望。

关键词: CO?捕集, 醇胺吸收剂, 热降解, 氧化降解, 化学降解, 热稳定盐, 腐蚀特性

Du Yannian, Wang Le, Ma Jun, Yang Yanjia, Wang Dong. Analysis of degradation pathways and corrosion characteristics of alcoholamine absorbents in CO₂ capture processes[J]. Petroleum Refinery Engineering, 2025, 55(5): 34-37.

杜延年, 王乐, 马骏, 杨琰嘉, 汪东. CO₂捕集过程中醇胺吸收剂降解路径及腐蚀特性分析[J]. 炼油技术与工程, 2025, 55(5): 34-37.

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Analysis of degradation pathways and corrosion characteristics of alcoholamine absorbents in CO₂ capture processes

CO₂捕集过程中醇胺吸收剂降解路径及腐蚀特性分析

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