Adsorption separation of propylene/propane by pressure induced flexible porous MOF

IF 4.7 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2025-04-16 DOI:10.1016/j.micromeso.2025.113644

Huiping Chen , Meiling Li , Dongxu Gu , Guang Che

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Abstract

The separation of C₃H₆ from C₃H₈ represents a significant yet challenging industrial task. Utilizing adsorption separation technology based on porous materials emerges as an energy-saving and cost-effective strategy. In this study, we investigate a flexible porous MOF, HNU-49, as a promising adsorbent for the efficient separation of C₃H₆ and C₃H₈ within the temperature range of 288–308 K. Due to its adaptable microporous structure, HNU-49 displays a distinct guest-dependent pressure-induced gate-opening effect, facilitating the effective separation of propylene and propane. Experimental studies, including adsorption isotherms and transient breakthrough experiments, were conducted to evaluate the separation performance of HNU-49, and cyclic experiments were performed to assess its structural stability. At a temperature of 298 K and a pressure of 0.2 bar, HNU-49 exhibits an IAST selectivity of 5.13 for C₃H₆/C₃H₈. The findings indicate that flexible MOFs with guest-dependent pressure-induced gate-opening effects hold potential applications in selective gas adsorption and separation. Moreover, these stable materials demonstrate good regenerability, making them advantageous for practical applications.

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压力诱导柔性多孔MOF吸附分离丙烯/丙烷

从C3H8中分离C3H6是一项重要而具有挑战性的工业任务。利用基于多孔材料的吸附分离技术是一种节能、经济的方法。在这项研究中，我们研究了一种柔性多孔MOF， HNU-49，作为一种有前途的吸附剂，在288-308 K的温度范围内有效分离C3H6和C3H8。由于其适应性强的微孔结构，HNU-49表现出明显的客源依赖压力诱导的开门效应，有利于丙烯和丙烷的有效分离。通过吸附等温线实验和瞬态突破实验对HNU-49的分离性能进行评价，并通过循环实验对其结构稳定性进行评价。在298 K和0.2 bar的压力下，HNU-49对C3H6/C3H8的选择性为5.13。研究结果表明，具有客体依赖性压力诱导门开启效应的柔性MOFs在选择性气体吸附和分离方面具有潜在的应用前景。此外，这些稳定的材料表现出良好的可再生性，有利于实际应用。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.