Metal‐Organic Framework Materials for Light Hydrocarbon Separation

Abstract

In practical industrial applications, the separation of light hydrocarbon mixtures is a very important technology. In recent years, some progress has been made in metal‐organic framework materials for light hydrocarbon separation, but further research is still needed. This Minireivew presents a systematic discussion on the latest developments and separation mechanisms of metal‐organic framework materials for C2 and C3 mixtures, discusses the problems faced by metal‐organic framework materials in the study of light hydrocarbon adsorption and separation, and provides a reference for the design, preparation and process development of low‐carbon hydrocarbon adsorption and separation materials in the future.

Structural Phase Transformations Induced by Guest Molecules in a Nickel-Based 2D Square Lattice Coordination Network

“…Since “third generation coordination polymers” or “soft porous crystals” were introduced in the late 1990s and early 2000s, flexible metal–organic materials (FMOMs), i.e., materials that adjust their structures when exposed to external stimuli, have been explored with emphasis upon their potential utility for gas, vapor, and liquid storage applications. − Whereas rigid porous coordination networks (PCNs) typically display type I (Langmuir) sorption isotherms and some microporous PCNs can exhibit exceptional selectivity in the context of separation of industrially relevant gas and vapor mixtures, such as C1 gases; C2 gases; , C3 gases; , C6 aromatics; and C8 aromatics, FMOMs can undergo structural transformation(s) in response to guest molecules and sometimes exhibit sharp-stepped isotherms that are usually accompanied by a phase transformation from a closed (nonporous) to an open (porous) phase (switching). − The ability of FMOMs to adjust their pore geometry as a consequence of structural transformations − can enable enhanced working capacity and thermodynamic management, which is relevant for gas storage applications …”

Pore Space Partitioning MIL-88(Co): Developing Robust Adsorbents for CO2/CH4 Separation Featured with High CO2 Adsorption and Rapid Desorption

“…Metal–organic frameworks (MOFs), with porous and robust structures and tunable pore sizes, have been recognized as ideal materials for gas separation and purification. − Microporous MOFs are commonly used as highly efficient adsorbents because of their suitable aperture size commensurate with the size of a gas molecule, effectively capturing small gas molecules and increasing gas capacity . In contrast, materials with a large cavity are not conducive to gas separation and are prone to frame collapse during the activation process. − In the case they are applied to gas adsorption and separation, MOFs with a large cavity should be converted into microporous counterparts, thus providing more confined spaces to achieve stronger gas molecule–framework interactions.…”

“…23 The multi-module character of the pacs platform allows one to choose different metal clusters, ligands, and porepartitioning agents for assembling various MOF materials with desired separation properties. By utilizing the PSP strategy, we herein report three (3,9)-connected new MOF materials, Co-BDC-TPB, Co-DOBDC-TPB, and Co-DCBDC-TPB, constructed with trinuclear cobalt clusters, pore-partitioning agent TPB, and three linear dicarboxylate linkers (Figure 1 and Figure S1). For comparison, commonly used C 3 pore partition agents are summarized in Figure S2.…”

Structural Diversity and Carbon Dioxide Sorption Selectivity of Zinc(II) Metal-Organic Frameworks Based on Bis(1,2,4-triazol-1-yl)methane and Terephthalic Acid

“…Metal–organic frameworks (MOFs) are one of the most perspective classes of coordination polymers due to their luminescent and sensing properties [ 8 , 9 , 10 , 11 , 12 , 13 ], catalytic activity [ 14 , 15 , 16 , 17 ], and high sorption capacity or sorption selectivity toward gases [ 18 , 19 , 20 ] and liquids [ 21 , 22 ]. Emerging applications of MOFs include targeted drug delivery [ 23 , 24 ], enzyme immobilization [ 25 , 26 ] and bio-imaging [ 27 , 28 ].…”