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Updated: Nov 10, 2025

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A Pressure Swing Approach to Selective CO2 Sequestration Using Functionalized Hypercrosslinked Polymers.

Alex M James1, Jake Reynolds1, Daniel G Reed2

  • 1Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, UK.

Materials (Basel, Switzerland)
|April 3, 2021
PubMed
Summary
This summary is machine-generated.

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Functionalized hypercrosslinked polymers (HCPs) efficiently capture carbon dioxide (CO2) under humid, high-temperature conditions. These materials rapidly convert dilute CO2 streams into concentrated streams using pressure swing adsorption (PSA).

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Carbon dioxide (CO2) capture is crucial for mitigating climate change.
  • Developing efficient and selective CO2 adsorbents is a key challenge.
  • Hypercrosslinked polymers (HCPs) offer tunable porosity and surface chemistry for gas separation.

Purpose of the Study:

  • To evaluate functionalized HCPs for CO2 capture under realistic industrial conditions.
  • To assess the performance of HCPs using pressure swing adsorption (PSA) methodology.
  • To demonstrate the separation of CO2 from N2 in simulated flue gas streams.

Main Methods:

  • Synthesis of functionalized HCPs with varying surface areas (213–1124 m²/g).
  • CO2 adsorption experiments under humid conditions and elevated temperatures.
Keywords:
carbons captureporous materialsporous polymers

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  • Application of promising HCPs in a PSA setup with simulated flue gas.

    • Main Results:

    • HCPs exhibited rapid CO2 uptake, reaching maximum adsorption in under 60 seconds.
    • Carbazole, triphenylmethanol, and triphenylamine based HCPs showed high selectivity and capacity.
    • These networks effectively concentrated CO2 from >20% to >85% in just two PSA cycles.

    Conclusions:

    • Functionalized HCPs are highly effective for CO2 capture and separation via PSA.
    • The synthesized materials demonstrate suitability for industrial CO2 separation applications.
    • This study highlights the potential of readily synthesized porous materials for flue gas treatment.