发电技术 ›› 2026, Vol. 47 ›› Issue (2): 248-256.DOI: 10.12096/j.2096-4528.pgt.260202

• 发电及环境保护 • 上一篇    

燃煤烟气碳捕集混合胺吸收剂降解性能研究

姚晨翔1, 王争荣2, 夏芝香1, 李超1, 孙路长2, 王凯亮2, 胡昔鸣3, 方梦祥1   

  1. 1.能源高效清洁利用全国重点实验室(浙江大学),浙江省 杭州市 310027
    2.中国华电科工集团有限公司,北京市 丰台区 100160
    3.浙江大学青山湖能源研究基地,浙江省 杭州市 311300
  • 收稿日期:2025-02-24 修回日期:2025-05-10 出版日期:2026-04-30 发布日期:2026-04-21
  • 作者简介:姚晨翔(2001),男,硕士研究生,主要研究方向为碳捕集化学吸收剂配方及降解性能,22360078@zju.edu.cn
    王争荣(1984),男,硕士,高级工程师,主要从事燃煤电厂节能减排、碳捕集与利用技术等方面研究,wangzr@chec.com.cn
    方梦祥(1965),男,博士,教授,主要从事煤和生物质流化床热解、气化和燃烧,CO2化学吸收技术等方面研究,本文通信作者,mxfang@zju.edu.cn
  • 基金资助:
    国家重点研发计划国际合作项目(2023YFE0199300);中国华电集团公司揭榜挂帅项目(CHDKJ21-01-109)

Study on Degradation Performance of Mixed Amine Absorbent for Carbon Capture From Coal-Fired Flue Gas

Chenxiang YAO1, Zhengrong WANG2, Zhixiang XIA1, Chao LI1, Luchang SUN2, Kailiang WANG2, Ximing HU3, Mengxiang FANG1   

  1. 1.National Key Laboratory of Energy Efficiency and Clean Utilization (Zhejiang University), Hangzhou 310027, Zhejiang Province, China
    2.China Huadian Engineering Co. , Ltd. , Fengtai District, Beijing 100160, China
    3.Qingshan Lake Energy Research Base, Zhejiang University, Hangzhou 311300, Zhejiang Province, China
  • Received:2025-02-24 Revised:2025-05-10 Published:2026-04-30 Online:2026-04-21
  • Supported by:
    National Key R&D Program International Cooperation Project(2023YFE0199300);Enlisting and Leading Project of China Huadian Coroperation Ltd(CHDKJ21-01-109)

摘要:

目的 化学吸收剂稳定性是化学吸收碳捕集系统稳定运行的关键,为此,研究新型混合胺吸收剂BA-1氧化降解和热降解问题,并进行抗降解剂研究。 方法 通过热降解实验装置,在不同温度(100、120、140 ℃)和CO2负载浓度(0~1.5 mol/L)条件下,对BA-1吸收剂的热降解行为进行了研究。同时,利用氧化降解实验装置,在65 ℃、纯氧氛围下考察了BA-1吸收剂的氧化降解性能。通过阳离子色谱和阴离子色谱技术,分析了BA-1吸收剂的降解率及降解产物。并对2,5-二巯基-1,3,4-噻二唑(DMTD)、螯合剂E-1、Na2SO3和乙醛肟(AAO)的抗氧化作用进行了测试。 结果 BA-1吸收剂的降解主要由氧化降解引起。在添加E-1、Na2SO3和AAO后,BA-1吸收剂的降解速率得到有效抑制。其中,添加质量分数0.3%的E-1时,BA-1在24天内的降解率仅为22.5%,降解抑制率高达53.8%。降解产物主要包括甲酸根、醋酸根、草酸根和硝酸根等物质,其中氧化降解产物的生成量是热降解的10倍以上,进一步证实了氧化降解是BA-1吸收剂降解的主要机制。 结论 混合胺吸收剂的降解主要是由氧化降解导致,添加螯合剂能较好地解决吸收剂在工业应用时的降解问题。

关键词: 碳捕集, 温室气体, 混合胺吸收剂, 热降解, 氧化降解, 抗氧化, 碳捕集、利用与封存(CCUS)

Abstract:

Objectives The stability of chemical absorbents is key to the stable operation of chemical absorption carbon capture systems. Therefore, the oxidative and thermal degradation of a novel mixed amine absorbent BA-1 is investigated, along with the evaluation of anti-degradation agents. Methods The thermal degradation behavior of BA-1 is investigated using a thermal degradation experimental device under different temperatures (100, 120, and 140 ℃) and CO2 loading concentrations (0-1.5 mol/L). Meanwhile, the oxidative degradation performance of BA-1 is assessed at 65 ℃ under a pure oxygen atmosphere using an oxidative degradation experimental device. The degradation rate and degradation products of BA-1 are analyzed using cation and anion chromatography techniques. The antioxidant effects of 2,5-dimercapto-1,3,4-thiadiazole (DMTD), chelating agent E-1, sodium sulfite (Na2SO3), and acetaldehyde oxime (AAO) are tested. Results The degradation of BA-1 is mainly caused by oxidative degradation. After the addition of E-1, Na2SO3, and AAO, the degradation rate of BA-1 is effectively suppressed. When 0.3% of E-1 is added, the degradation rate of BA-1 over 24 days is only 22.5%, with the degradation inhibition rate reaching 53.8%. The primary degradation products include formate, acetate, oxalate, and nitrate ions. The yield of oxidative degradation products is more than ten times that of thermal degradation products, further confirming that oxidative degradation is the main degradation mechanism of the BA-1 absorbent. Conclusions The degradation of mixed amine absorbents is mainly caused by oxidative degradation, and the addition of chelating agents can effectively mitigate absorbent degradation during industrial applications.

Key words: carbon capture, greenhouse gas, mixed amine absorbent, thermal degradation, oxidative degradation, antioxidant, carbon capture, utilization and storage (CCUS)

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