Phase equilibria of liquid mixtures in the presence of solids or gas phases

固相或气相存在下液体混合物的相平衡

• 批准号: 285688730
• 负责人: Dr.-Ing. Mandy Klauck
• 金额: --
• 依托单位: Fakultät Landbau/Umwelt/Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/285688730?language=en
• 关键词: Phase; equilibria; liquid; mixtures; presence

Multi-component liquid mixtures are often used in the industrial praxis of separation and purification processes. Their theoretical description, however, remains still challenging. This applies for liquid-vapour and liquid-liquid equilibria as well as for the adsorption equilibria on porous or disperse solids. Reliable predictions are required due to the considerable effort for the determination of equilibrium data. In this project, the thermodynamic modeling of phase equilibria in the presence of solids is to be improved. In order to meet this objective, the models for prediction of multicomponent adsorption equilibria from binary data using the absolute and excess formalisms used so far will be further developed on the base of statistical thermodynamics. An enhanced connection of the thermodynamics of interfaces and mixtures will stronger take into account the influence of fluid-fluid interactions on adsorption - in particular for real mixtures exhibiting miscibility gaps. For evaluating the suitability of the new calculation model, experimental adsorption isotherms of real fluid mixtures of non-associating and associating components will be used. In light of energy efficient separation and purification processes, the intended work contributes to fundamental thermodynamic research.

多组分液体混合物经常用于分离和纯化过程的工业实践中。然而，它们的理论描述仍然具有挑战性。这适用于液-汽平衡和液-液平衡以及多孔或分散固体的吸附平衡。由于平衡数据的确定需要相当大的努力，因此需要可靠的预测。在这个项目中，在固体存在下的相平衡的热力学模型将得到改进。为了实现这一目标，将在统计热力学的基础上进一步发展使用迄今为止使用的绝对和过量形式主义从二元数据预测多组分吸附平衡的模型。界面和混合物的热力学的增强的连接将更强地考虑流体-流体相互作用对吸附的影响-特别是对于表现出可溶解性间隙的真实的混合物。为了评价新的计算模型的适用性，将使用非缔合和缔合组分的真实的流体混合物的实验吸附等温线。鉴于节能的分离和纯化过程，预期的工作有助于基础热力学研究。