ANR: Demixing Amines for CO2 Capture: Thermodynamic and Spectroscopic Approach

混合溶剂中CO2的化学吸收被认为是从燃烧后工业废水中捕获CO2以减少全球变暖的有前景的技术。溶剂的再生成本很高，消耗了发电站30%至40%的能量。 为了降低能量成本，已经提出了一种新的概念，其中在升高的温度下相分离的胺的水溶液将被用作碳捕获溶剂。本项目提案是对含有一系列结构相关胺的二元和三元体系的物理化学和工程性质进行基础研究，这些胺适用于这些"分层"碳捕获过程。这些测量将在克莱蒙费朗的Blaise Pascal大学和圭尔夫大学使用具有独特互补能力的高精度仪器在更大的温度范围内进行。 该研究将阐明所需的结构-性能的关系，以设计合适的分层胺CO2吸收，通过测量的性质的一类哌啶衍生物进行液-液相分离和分析的效果取代的烷基和/或芳基基团在环上的不同位置。热力学测量（CO2溶解度和液-液平衡;混合物;过量摩尔热容和体积）将主要在Universite Blaise Pascal的热力学和分子相互作用实验室进行。 圭尔夫大学水热化学组的拉曼光谱将带来关于胺溶液中和分离后共存相中吸收的二氧化碳形态的新信息。加拿大和法国的工业合作伙伴Gas Liquid Engineering Ltd.和IFP Energies Nouvelles将为这种新的碳捕获技术的建模和现场应用提供指导。

The chemical absorption of CO2 in mixed solvents is considered to be a promising technology for carbon dioxide (CO2) capture from post-combustion industrial effluents to reduce global warming. The regeneration of the solvent is costly, consuming 30 to 40% of the energy from the power station. To reduce the energy cost, a novel concept has been proposed in which the aqueous solutions of amines that phase separate at elevated temperatures would be used as the carbon-capture solvent. This project proposal is for a fundamental study of physico-chemical and engineering properties of binary and ternary systems containing a series of structurally-related amines suitable for these "de-mixing" carbon capture processes. These measurements will be carried out over an extended range of temperatures using high-precision instruments, with unique, complementary capabilities, at Universite Blaise Pascal in Clermont Ferrand and the University of Guelph. The study will elucidate the structure-property relationships needed to design suitable de-mixing amines for CO2 absorption, by measuring the properties of a class of piperidine derivatives which undergo liquid-liquid phase separation and analysing the effect of substitution by alkyl and/or aryl groups in different positions on the ring. The thermodynamic measurements (CO2 solubilities and liquid-liquid equilibria; enthalpies of mixing; excess molar heat capacities and volumes) will be performed mainly in the Laboratory for Thermodynamics and Molecular Interactions at Universite Blaise Pascal. Raman spectroscopy at the Hydrothermal Chemistry Group of the University of Guelph will bring new information on the speciation of the absorbed carbon dioxide in amine solutions and in coexisting phases after de-mixing. Canadian and French industrial partners, Gas Liquid Engineering Ltd. and IFP Energies Nouvelles, will provide guidance in the modelling and field applications of this new carbon capture technology.