发布时间：2024-06-03

文章标题：祝贺课题组博士生毛元豪 （Mao Yuanhao）一作论文被Applied Energy期刊接收, Applied Energy 369C (2024) 123597

内容：

Stability improvement of the advanced electrochemical CO2 capture process with high-capacity polyamine solvents

 

Yuanhao Mao , Sayd Sultan , Huifeng Fan , Yunsong Yu , Xiaomei Wu* , Zaoxiao Zhang*

1 School of Chemical Engineering and Technology, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, P.R. China

2 State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, P.R. China

 

Abstract

 

The electrochemically mediated amine regeneration (EMAR) technology is regarded as a promising electrochemical carbon capture method which has the potential to be cost-effective, environmentally friendly and energy efficient. Extensive research has been conducted on the EMAR process, ranging from the mechanism to technical and economic evaluations. However, the practical application of this technology still encounters certain challenges, including limited absorbent options, unclear reaction mechanism, poor copper cycling performance and equipment corrosion hazards. To solve these problems, ethylenediamine (EDA), diethylenetriamine (DETA), and triethylenetetramine (TETA) are selected as potential absorbents for the EMAR process in this work. The different Cu-polyamine systems receive comprehensive investigations including electrochemical characterization, analysis of cathodic nucleation mechanism, corrosion assessment, and absorption/desorption performance evaluation. We experimentally reveal the electrodeposition mechanism of copper ion and predict the quality of copper deposited layers in different polyamine solutions. In addition, the results show that the adsorption of copper-amine ionic complexes on the surface of carbon steel in the EMAR system will enhance the corrosion resistance. Based on the Cu-DETA system, we achieved a low energy consumption of 36.67 kJe/mol CO2 at a current density of 0.01 A/cm², which is very competitive with the state-of-the-art EMAR systems.

 

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高容量多胺吸收剂提升电化学CO2捕集系统稳定性

 

毛元豪 , Sayd Sultan , 范会峰 , 余云松 , 吴小梅* , 张早校*

 

摘要

电化学介导胺再生（EMAR）技术被认为是一种具有高成本效益、环境友好和高节能潜力的电化学碳捕集方法。现有研究已从反应机理到技术经济性评价等全方面对EMAR技术进行优化探索。然而，该技术的工业化应用仍面临一些挑战，如吸收剂选择范围有限、反应机理尚不明确、铜电极循环性能差以及有机胺溶液对设备的腐蚀风险等。为了解决上述问题，本研究选择乙二胺（EDA）、二乙烯三胺（DETA）和三乙烯四胺（TETA）作为 EMAR 工艺的潜在吸收剂，通过电化学表征、阴极成核机制分析、腐蚀评估以及吸收/解吸性能评估等方面对不同的铜/多胺体系进行了全面的研究。实验结果揭示了铜离子的电沉积机制，并预测了不同多胺溶液中阴极铜的沉积质量。此外，研究结果表明，在EMAR系统中，铜-多胺络合物在碳钢表面的吸附作用将增强碳钢的抗腐蚀能力。基于Cu-DETA体系，在0.01 A/cm²的电流密度下实现了36.67 kJ_e/mol CO₂的低解吸能耗，与目前报道的先进EMAR系统相比具有极强的竞争力。

 

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