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 至 +80°C 的宽温度范围内对化学性质相似的 C2 至 C5 碳氢化合物的混合物吸附的温度依赖性进行实验研究和热力学建模。研究了不同的吸附剂，它们的基本吸附机制不同，因此可以更深入地了解混合物吸附，例如相同链长的正烷烃和正烯烃与钠基吸附剂的结合。对于这些系统，单组分吸附等温线和混合物等温线进行了实验。对实验结果、相互作用的基本机制和温度依赖性进行了分析和讨论，以描述实验数据。 ，（取决于温度的）热力学一致模型将在必要时应用、修改或进一步开发，这包括 IAST 等已建立的方法，但如果这些方法没有显示出足够的精度，则还需要更复杂的模型。与具有相应活度系数模型的 RAST 一样，这些模型还有助于对多组分吸附的温度依赖性有更深入的科学了解，以便能够预测它并将其转移到其他系统。最后，吸附分离的温度依赖性将被量化。基于选择性参数，以优化技术分离的工艺参数。