Study on thermal degradation characteristics of carbon capture alkanolamine absorbent after combustion

ZHANG Zengwei; MEIHERIAYI Mutailipu; LI Liwen; DU Shuming; XU Dong

doi:10.12434/j.issn.2097-2547.20240431

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Study on thermal degradation characteristics of carbon capture alkanolamine absorbent after combustion

更新时间：2025-09-26

- Study on thermal degradation characteristics of carbon capture alkanolamine absorbent after combustion
- Vol. 50, Issue 9, Pages: 83-90(2025)
- 作者机构：
  
  1.新疆大学西北能源碳中和教育部工程研究中心，新疆乌鲁木齐 830017
  2.新疆大学电气工程学院，新疆乌鲁木齐 830017
  3.国家能源集团新能源技术研究院有限公司，北京 100000
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240431
  CLC： TQ028.1
- Received：22 October 2024，
  
  Revised：2024-11-28，
  
  Published：25 September 2025
- 稿件说明：
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张增伟,美合日阿依·穆太力普 ,李立雯等.燃烧后碳捕集醇胺吸收剂热降解特性研究[J].低碳化学与化工,2025,50(09):83-90.

ZHANG Zengwei,MEIHERIAYI Mutailipu,LI Liwen,et al.Study on thermal degradation characteristics of carbon capture alkanolamine absorbent after combustion[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(09):83-90.
张增伟,美合日阿依·穆太力普 ,李立雯等.燃烧后碳捕集醇胺吸收剂热降解特性研究[J].低碳化学与化工,2025,50(09):83-90. DOI： 10.12434/j.issn.2097-2547.20240431.

ZHANG Zengwei,MEIHERIAYI Mutailipu,LI Liwen,et al.Study on thermal degradation characteristics of carbon capture alkanolamine absorbent after combustion[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(09):83-90. DOI： 10.12434/j.issn.2097-2547.20240431.

摘要

碳捕集吸收剂的降解不仅会使CO

浓度下降，还可能会导致设备腐蚀并增大碳捕集成本，探究吸收剂在高温条件下的降解特性对于选择合适的碳捕集材料至关重要。以质量分数为30%的乙醇胺（MEA）为基准胺，分别对MEA、二乙醇胺（DEA）、三乙醇胺（TEA）、3-氨基丙醇（MPA）和4-氨基丁醇5种醇胺进行了热降解特性实验研究。通过分析醇胺的降解率、CO

饱和负载下降率和黏度下降率等参数，探究了不同种类醇胺溶液在热降解过程中的变化规律，并结合气质联用色谱（GC-MS），进一步揭示了醇胺溶液吸收剂的降解机理。结果表明，经过16 d的热降解，MEA、DEA、TEA、MPA和4-氨基丁醇的降解特性呈现出明显差异。随着碳链增长，MEA、MPA和4-氨基丁醇的各项降解参数均有所减小，其中4-氨基丁醇最为稳定。对于伯胺MEA、仲胺DEA和叔胺TEA而言，DEA的热稳定性能最差，—CH

OH基团数量的增大并不会增强这3种胺的热降解性能。GC-MS检测结果表明，醇胺的热降解产物较少，其中MPA与4-氨基丁醇生成了哌嗪（PZ），PZ可能抑制了这两种胺的降解。4-氨基丁醇更易发生脱水环化反应，生成四氢吡咯。DEA与TEA的主要降解产物相似，但DEA降解产物数量更多。以上结果，可为优化碳捕集材料的选择提供实验依据。

Abstract

The degradation of carbon capture absorbents not only reduces CO

concentration but may also lead to equipment corrosion and increase costs of carbon capture. Investigating the degradation characteristics of absorbents under high-temperature conditions is crucial for selecting suitable carbon capture materials. Using monoethanolamine (MEA) with mass fraction of 30% as a baseline

thermal degradation experiments were conducted on five alkanolamines: MEA

diethanolamine (DEA)

triethanolamine (TEA)

3-aminopropanol (MPA) and 4-aminobutanol. Parameters such as degradation rate

saturation loading decline rate

and viscosity drop rate were analyzed to explore the variations in degradation patterns among different alkanolamines. Gas chromatography-mass spectrometry (GC-MS) was employed to further elucidate the degradation mechanisms. The results show that after 16 days of thermal degradation

there are significant differences in the degradation characteristics of MEA

DEA

TEA

MPA and 4-aminobutanol. With the increase of carbon chain length

degradation parameters of MEA

MPA and 4-aminobutanol decrease

with 4-aminobutanol exhibiting the highest stability. Among primary (MEA)

secondary (DEA) and tertiary amines (TEA)

DEA demonstrates the lowest thermal stability

and the addition of —CH

OH groups dose not enhance the thermal degr

adation resistance of these amines. The GC-MS detect results indicate that there are relatively few thermal degradation products of alcohol amines. MPA reacts with 4-aminobutanol to form piperazine (PZ)

which may inhibit the degradation of these two amines. 4-aminobutanol exhibits a tendency for dehydration and cyclization to form tetrahydropyrrole. The main degradation products of DEA and TEA are similar

but DEA has more degradation products. These findings can provide experimental evidence for optimizing the selection of carbon capture materials

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