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Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Updated: Jun 28, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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In Situ ZIF-8-Coated Copper Laminate System for Fluid-Phase Adsorptive Separation.

Ravi Sharma1, Shiara Uyttersprot1, Gino V Baron1

  • 1Chemical Engineering Department, Vrije Universiteit Brussel, Brussels B-1050, Belgium.

ACS Applied Materials & Interfaces
|May 15, 2025
PubMed
Summary
This summary is machine-generated.

This study developed novel metal-organic framework (MOF) coated copper laminates for efficient alcohol separation. The ZIF-8@Cu system demonstrates high adsorption capacity and selectivity, enabling effective recovery and regeneration for process intensification.

Keywords:
LEGOZIF-8adsorptive separationlaminate systemstructured adsorbentthermal swing adsorption

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Science

Background:

  • Structured adsorbents are crucial for adsorptive separation, with ex situ methods like extrusion and 3D printing well-explored.
  • In situ growth of adsorbents, particularly metal-organic frameworks (MOFs) on metal laminates, remains an underexplored area.
  • Existing methods often lack efficiency in large-scale applications for adsorptive separation.

Purpose of the Study:

  • To introduce a novel system of in situ grown MOF-coated metal laminates for adsorptive separation.
  • To evaluate the performance of ZIF-8 coated copper laminates (ZIF-8@Cu) for alcohol recovery from vapor and liquid phases.
  • To demonstrate the potential for process intensification through efficient adsorption and regeneration.

Main Methods:

  • Fabrication of embossed/dented copper laminates using CNC milling of aluminum templates.
  • Direct in situ coating of ZIF-8 crystals onto copper laminates at room temperature to form a 100 µm coating (ZIF-8@Cu).
  • Assembly of the ZIF-8@Cu laminate system in a custom column for evaluation in vapor and liquid phase alcohol recovery experiments.

Main Results:

  • Achieved high adsorption capacities for methanol (0.19 g/g) and n-butanol (0.26 g/g) with excellent selectivity (αMeOH/H2O = 8.5; αn-BuOH/H2O = 68).
  • Demonstrated efficient regeneration within 2 hours using thermal swing adsorption (TSA) for both vapor and liquid phase separations.
  • Observed dispersive effects in vapor-phase elution attributed to ZIF-8 properties and mass transfer limitations.

Conclusions:

  • The novel MOF-coated metal laminate system offers a promising approach for efficient adsorptive separation of alcohols.
  • The system combines benefits of microporosity, low pressure drop, mechanical stability, and efficient heat transfer for process intensification.
  • This study provides proof of concept for MOF-coated laminates in multiple adsorption-desorption cycles, highlighting their industrial potential.