Experimental and theoretical study of the temperature-dependence of multicomponent adsorption between -80 °C and +80°C

-80℃~80℃多组分吸附温度依赖性的实验与理论研究

• 批准号: 451578410
• 负责人: Professor Dr.-Ing. Dieter Bathen
• 金额: --
• 依托单位: Lehrstuhl für Thermische Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/451578410?language=en
• 关键词: Experimental; theoretical; study; temperature; dependence

The aim of the proposed project is to experimentally investigate and thermodynamically model the temperature dependence of mixture adsorption of chemically similar C2 to C5 hydrocarbons over a wide temperature range between -80°C and +80°C for the first time.Combinations of adsorptives and adsorbents are investigated, which differ in their fundamental adsorption mechanisms and therefore provide deeper insights into mixture adsorption, e.g. n-alkanes and n-alkenes of the same chain length combined with sodium-based and (partially) calcium-exchanged zeolites. For these systems, single-component adsorption isotherms and mixture isotherms are determined experimentally.The experimental results, the underlying mechanisms and the temperature dependence of the interactions are to be analysed and discussed. To describe the experimental data, (temperature-dependent) thermodynamically consistent models are to be applied, modified or further developed if necessary. This includes established methods like IAST, but also, if these do not show sufficient accuracy, more complex models like RAST with corresponding activity coefficient models. These models also serve to gain a deeper scientific understanding of the temperature dependence of multicomponent adsorption to be able to predict it and transfer it to other systems.Finally, the temperature dependence of the adsorptive separation will be quantified on the basis of selectivity parameters in order to optimize process parameters for technical separations.

该项目的目的是首次在-80°C到+80°C的较宽温度范围内对化学上相似的C2到C5烃的混合吸附的温度依赖关系进行实验研究和热力学模拟。研究了不同基本吸附机制的吸附剂和吸附剂的组合，从而为混合吸附提供了更深入的见解，例如相同链长的正构烷烃和正构烯烃与钠基沸石和(部分)钙交换沸石结合在一起。实验测定了这些体系的单组分吸附等温线和混合吸附等温线，并对实验结果、相互作用的机理和温度依赖性进行了分析和讨论。为了描述实验数据，(依赖于温度的)热力学一致性模型将在必要时被应用、修改或进一步发展。这包括已建立的方法，如IAST，但如果这些方法不能显示足够的准确性，也包括更复杂的模型，如RAST和相应的活动系数模型。这些模型还有助于更深入地科学地了解多组分吸附的温度依赖性，以便能够预测它并将其转移到其他系统。最后，将根据选择性参数对吸附分离的温度依赖性进行量化，以优化技术分离的工艺参数。