Recent progress in gas separation platforms based on hydrogen-bonded organic frameworks (HOFs)

Soleimani Abhari, Paria; Gholizadeh, Shahin; Rouhani, Farzaneh; Li, Yu-Lin; Morsali, Ali; Liu, Tian-Fu

doi:10.1039/d3qi00965c

“…Adsorptive separation is one of the most promising alternatives and has been widely explored in alkane isomers, − p -xylene isomers, − etc. − A simulated moving bed (SMB) as the main representative of continuous chromatography shows the advantages of high production efficiency, less organic solvent consumption, and large mass transfer force , and has been widely used in petrochemical, food, and pharmaceutical industries. − However, research on developing long-carbon-chain olefins/paraffins in the SMB separation process is rare due to the lack of systematic research on potential adsorbents and the elucidation of SMB process design …”

Section: Introductionmentioning

confidence: 99%

Systematic Study on the Simulated Moving Bed Process of 1-Octene/n-Octane Using FAU Zeolites

Lin,

Ai,

Zhang

et al. 2024

Ind. Eng. Chem. Res.

0

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Linear α-olefin (LAO) purification from an olefin/paraffin mixture by a simulated moving bed process is regarded as an energy-efficient alternative toward conventional distillation. However, the lack of a systematic study on the thermodynamic and kinetic adsorption behavior of promising adsorbents and the understanding of the gap between the separation performance of adsorbents and technological processes hinders the advance of the olefin/paraffin SMB process. Herein, the selective adsorption of LAOs from a binary liquid-phase 1-octene/n-octane mixture by FAU zeolites was investigated using batch adsorption and fixed bed pulse experiments. Considering the combined effect caused by the thermodynamic and kinetic factors, the octene/octane separation resolution is up to 0.286 with a mass transfer coefficient of 5.8 min −1 under 333 K at a flow rate of 4.00 mL/min. Moreover, based on the nonideal and nonequilibrium SMB mathematical model, the influences of operation parameters (t s , Q rec , Q D , Q E , and Q F ) of the SMB process on the purity and recovery of octene and octane are studied, and 99% purity octene with 99% yield could be obtained under the suitable conditions. This study from the thermodynamic and kinetic adsorption behavior of zeolites toward the ultimate technology process provides guidance for the design of octene/octane adsorbents for practical use.

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“…[14] Conversely, covalent attachment is significantly more stable and can effectively avoid interfacial gaps as well as the inhomogeneous dispersion of HOFs in the polymeric matrix. [15] However, establishing covalent bonds between HOFs and polymers without compromising H-bonds and other functional sites demands meticulous design. This is owing to the high inherent reactivity of H-bonding units such as carboxyl, amide, imidazole, aldehyde, and cyano groups.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal Postsynthetic Copolymerization of Hydrogen‐Bonded Organic Frameworks into a PolyHOF Membrane

Liu,

Ye,

He

et al. 2024

Angew Chem Int Ed

5

0

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Hydrogen‐bonded organic frameworks (HOFs) have shown promise in various fields; however, the construction of HOF/polymer hybrid membranes that can maintain both structural and functional integrity remains challenging. In this study, we here fabricated a new HOF (HOF‐50) with reserved polymerizable allyl group via charge‐assisted H‐bonds between the carboxylate anion and amidinium, and subsequently copolymerized the HOF with monomers to construct a covalently bonded HOF/polymer hybrid (polyHOF) membrane. The resulting polyHOF membrane not only exhibits customizable mechanical properties and extreme stability, but also shows an exceptional ratiometric luminescent temperature‐sensing function with very high sensitivity and visibility even when the lanthanide content is two orders of magnitude lower than that of the reported mixed‐lanthanide metal organic frameworks (MOFs) and lanthanide‐doped covalent organic frameworks (COFs). This orthogonal postsynthesis copolymerization strategy may provide a general approach for preparing covalently connected HOF/polymer hybrid membranes for diverse applications.

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“…Physical blending is the simplest method; however, leakage of HOF particles from the polymer matrix has been observed [14] . Conversely, covalent attachment is significantly more stable and can effectively avoid interfacial gaps as well as the inhomogeneous dispersion of HOFs in the polymeric matrix [15] . However, establishing covalent bonds between HOFs and polymers without compromising H‐bonds and other functional sites demands meticulous design.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal Postsynthetic Copolymerization of Hydrogen‐Bonded Organic Frameworks into a PolyHOF Membrane

Liu,

Ye,

He

et al. 2024

Angewandte Chemie

0

View full text Add to dashboard Cite

Hydrogen‐bonded organic frameworks (HOFs) have shown promise in various fields; however, the construction of HOF/polymer hybrid membranes that can maintain both structural and functional integrity remains challenging. In this study, we here fabricated a new HOF (HOF‐50) with reserved polymerizable allyl group via charge‐assisted H‐bonds between the carboxylate anion and amidinium, and subsequently copolymerized the HOF with monomers to construct a covalently bonded HOF/polymer hybrid (polyHOF) membrane. The resulting polyHOF membrane not only exhibits customizable mechanical properties and extreme stability, but also shows an exceptional ratiometric luminescent temperature‐sensing function with very high sensitivity and visibility even when the lanthanide content is two orders of magnitude lower than that of the reported mixed‐lanthanide metal organic frameworks (MOFs) and lanthanide‐doped covalent organic frameworks (COFs). This orthogonal postsynthesis copolymerization strategy may provide a general approach for preparing covalently connected HOF/polymer hybrid membranes for diverse applications.

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Recent progress in gas separation platforms based on hydrogen-bonded organic frameworks (HOFs)

Abstract: Hydrogen-bonded frameworks (HOFs) are a new and appealing class of porous crystalline materials that are built from organic moieties through hydrogen bonding. Because of the brittle character of hydrogen bonding...

Cited by 14 publications

References 142 publications

Systematic Study on the Simulated Moving Bed Process of 1-Octene/n-Octane Using FAU Zeolites

Systematic Study on the Simulated Moving Bed Process of 1-Octene/n-Octane Using FAU Zeolites

Orthogonal Postsynthetic Copolymerization of Hydrogen‐Bonded Organic Frameworks into a PolyHOF Membrane

Orthogonal Postsynthetic Copolymerization of Hydrogen‐Bonded Organic Frameworks into a PolyHOF Membrane

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