两相吸收剂捕集二氧化碳技术研究进展

化学吸收法是现阶段烟气CO₂捕集较为成熟的技术路线之一,但吸收剂能耗高影响了该技术广泛工业应用。两相吸收剂具有大幅度降低再生能耗的潜力,受到国内外研究学者广泛关注。该文综述了目前两相吸收工艺和两相吸收剂的研究进展,介绍3种两相吸收工艺及其降耗原理。重点介绍混合胺型和物理溶剂型两类两相吸收剂的研发现状,分析和比较分相特性、分相机理和再生能耗等性能。阐述黏度升高对贫富液换热器及两相工艺再生能耗的影响,提出定量分析方法。介绍现有两相吸收剂挥发性、降解及腐蚀特性的研究现状。结合研究现状和烟气碳捕集需求,提出下一步两相吸收剂的研究方向。

Research Progress in Biphasic Solvent for CO2 Capture Technology

Chemical absorption is currently the most mature technology for CO₂ capture from flue gas.However,this technology hasn’t been put into commercial application due to the high regeneration energy.Biphasic solvent is a promising solution as it can significantly reduce the regeneration energy.This paper reviewed three processes using the biphasic solvent for CO₂ capture and their energy-saving principle.Two types of amine blended and physical-chemical biphasic solvents were summarized.The biphasic behaviors,phase separation mechanism,and regeneration energy of these biphasic solvents were analyzed and compared.Quantitative analysis on the effect of increased viscosity of the biphasic solvent on the lean/rich heat exchanger was conducted.Research progress on the volatility,degradation,and corrosion of the biphasic solvent was introduced.Based on current research status and the deployment of CO₂ capture from flue gas,the future direction of the biphasic solvent was discussed.