Low-Temperature N2 and He Separation on a HKUST-1 Membrane

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2023-11-24 DOI:10.1134/S2070205123700995

I. V. Grenev, V. Yu. Gavrilov

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Abstract

Technologies of membrane-based gas separation can be integrated into existing industrial processes for low-temperature helium recovery from natural gas at the stages of crude helium separation from the N₂/He mixture and its purification. The effectiveness of these processes is most affected by the properties of the materials from which the membrane is made. Due to their unique properties, metal-organic framework are promising materials for use in gas separation. In the present work, both the Monte Carlo and equilibrium molecular dynamics methods were employed to examine the temperature dependence of membrane selectivity and nitrogen permeability for separation of an equimolar mixture of N₂ and He by a HKUST-1-based membrane at a pressure drop of 0.1, 0.3, and 1 MPa. It was shown that the selection of optimal temperature conditions made it possible to obtain a significant increase in membrane selectivity and permeability for nitrogen compared to corresponding parameters at room temperature.

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hust -1膜的低温氮气和He分离

基于膜的气体分离技术可以整合到现有的工业工艺中，用于从N2/He混合物中分离粗氦及其净化阶段的天然气低温氦回收。这些过程的有效性受到制造膜的材料性质的影响最大。由于其独特的性能，金属-有机骨架是一种很有前途的气体分离材料。本文采用蒙特卡罗方法和平衡分子动力学方法，研究了hust -1基膜在压力降为0.1、0.3和1 MPa时分离等摩尔氮气和He混合物时膜的选择性和氮的渗透性对温度的依赖关系。结果表明，与室温下的相应参数相比，选择最佳温度条件可以显著提高膜对氮的选择性和透性。

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.