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A Study on the Degradation Performance of MDEA/PZ and MDEA/AEP With the Influence of Sulfur Compounds

Author

Listed:
  • Xiaoming Xu
  • Ying Xie
  • Yang Xia
  • Mengxiang Fang
  • Jie Cheng
  • Chenxiang Yao
  • Zihao Liu
  • Hao Xiang
  • Nengchuang Zhu
  • Gengsheng Liu

Abstract

With the increasing global energy demand and its environmental impacts, carbon capture, utilization, and storage technology (CCUS) has become a crucial means to reduce CO2 emissions and address climate change. This study investigated the thermal and oxidative degradation characteristics of two amine blend absorbents, methyldiethanolamine (MDEA)/piperazine (PZ) and MDEA/2‐(piperazin‐1‐yl) ethanamine (AEP) and explored the effect of sulfur compounds on their stability. The experimental results indicated that MDEA/PZ exhibited a lower thermal degradation rate, whereas MDEA/AEP, due to the thermal instability of the AEP component, showed poorer degradation performance. In terms of oxidative degradation, monoethanolamine (MEA) demonstrated a higher oxidative degradation rate, whereas MDEA/PZ and MDEA/AEP exhibited lower oxidative degradation rates. The addition of inhibitors reduced the oxidative degradation rates of MDEA/PZ and MDEA/AEP, with antimony potassium tartrate (APT) proving to be the most effective inhibitor. In sulfur‐containing environments, sulfur compounds (hydrogen sulfide and carbonyl sulfide) significantly enhanced both the thermal and oxidative degradation rate of MDEA/PZ and MDEA/AEP, particularly for MDEA/AEP, where the thermal degradation rate increased by 25.2%. This study revealed the impact of sulfur compounds on the thermal and oxidative degradation of absorbents. The findings provide important experimental data and theoretical support for optimizing the stability of carbon capture absorbents.

Suggested Citation

  • Xiaoming Xu & Ying Xie & Yang Xia & Mengxiang Fang & Jie Cheng & Chenxiang Yao & Zihao Liu & Hao Xiang & Nengchuang Zhu & Gengsheng Liu, 2026. "A Study on the Degradation Performance of MDEA/PZ and MDEA/AEP With the Influence of Sulfur Compounds," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 16(1), pages 4-15, February.
    • Handle: RePEc:wly:greenh:v:16:y:2026:i:1:p:4-15
    DOI: 10.1002/ghg.2382
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    References listed on IDEAS

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    1. Yaumi, A.L. & Bakar, M.Z. Abu & Hameed, B.H., 2017. "Recent advances in functionalized composite solid materials for carbon dioxide capture," Energy, Elsevier, vol. 124(C), pages 461-480.
    2. Katharine L. Ricke & Ken Caldeira, 2014. "Natural climate variability and future climate policy," Nature Climate Change, Nature, vol. 4(5), pages 333-338, May.
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