CCS中不凝性气体杂质对CO2热力学性质的影响研究

Carbon dioxide capture and storage (CCS) is currently considered as an promising option of mitigation actions for stabilization of atmospheric greenhouse gas concentrations. For the CCS technology, impurities especially non-condensable ones have great impacts on the design, operation and optimization of pipeline transportation through their impacts on the thermodynamic properties of CO2. The influence of impurities in CO2 thermodynamic properties are not fully understood for now. Thermodynamic properties of CO2-streams (mole fraction of CO2 higher than 85% and contains non-condensable impurities) will be studied in this research. The PVTx and phase equilibrium property data of CO2-streams will be obtained to fill the existing research gaps. The correlation model of binary interaction parameter between different components, as well as an accurate equation of state for CO2-stream will be studied. Not only lots of basic data important for the CO2-streams will be obtained through this research, but also an accurate optimization of pipeline transportation will be obtained with the equation model to enhance the development of CCS.

二氧化碳捕获和封存技术（Carbon Dioxide Capture and Storage，简称CCS）是目前被认为最具潜力的温室气体减排技术。而CCS技术中会涉及多种不凝性气体杂质，将明显改变CO2的热力学性质，进而对CO2的管道输送过程产生相应的影响。目前各种杂质对CO2热力学性质的影响行为和机理还未进行深入研究。本项目将针对不凝性气体杂质与CO2组成的富CO2混合物（CO2摩尔分数大于85%）的热力学性质开展研究，主要工作包括：通过实验研究获取富CO2混合物的系统的PVTx和相平衡性质实验数据，探索混合物中各组分之间的交互作用机理，并在此基础上开发多组分富CO2混合物高精度状态方程。通过本项目研究，不仅可以为相关CO2混合物提供准确合理的基础热物性数据，也为CO2管道输送系统的优化分析提供高精度的状态方程模型，促进和推动CCS技术的发展。

二氧化碳捕获和封存技术（Carbon Dioxide Capture and Storage，简称CCS）是目前被认为最具潜力的温室气体减排技术。而CCS技术中会涉及多种不凝性气体杂质，将明显改变CO2的热力学性质，进而对CO2的管道输送过程产生相应的影响。目前各种杂质对CO2热力学性质的影响行为和机理还未进行深入研究。同时环保替代工质研究在目前全球性环境危机下也具有重要意义。本项目针对不凝性气体杂质与CO2组成的富CO2混合物（CO2摩尔分数大于85%）的热力学性质以及环保替代工质界面性质开展研究，经过项目组成员的共同努力，主要完成的工作包括：完成了高精度流体热物性基础实验平台的研制；研制了气相PVTx性质实验系统、毛细上升法和悬滴法流体表面/界面张力实验系统；完成了CO2/Ar混合物的气相PVTx性质实验研究、碳酸二甲酯和烷烃类混合物表面张力的实验和理论研究、醇水溶液表面张力的理论研究。通过这些工作一方面获得了高精度的实验数据，同时也推动了流体热物性领域的研究进展。