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April 12, 2026Environmental Science & Technology

Structure–Property Relationships for Moisture-Swing Direct Air Capture

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Authors

JHJohn HegartyMBMichael L. BarsoumMBMegan Burrill

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Overview

Investigation reveals moisture-swing carbon capture properties in ion-exchange resins, suggesting efficiency optimization methods.

Key Points

  • This research aims to explore the structure-property relationships that influence moisture-swing carbon capture performance.
  • Investigated various polymer backbones and ammonium functionality in ion-exchange resins.
  • Assessed thermodynamic and kinetic behaviors via closed-loop cycling with CO2 at varying humidity levels.
  • Characterized resin properties using SEM/EDS, N2 sorption, solid-state NMR, and FTIR spectroscopies.
  • Macroporous IERs showed better capacity and kinetics than gel-type IERs with optimal pore size.
  • Type I and Type II IERs exhibited higher swing capacities with distinct counteranions.
  • Acrylic backbones significantly enhanced water uptake compared to styrenic backbones.

Cite This Study

Hegarty et al. (2026) studied this question.

synapsesocial.com/papers/69db38534fe01fead37c691dhttps://doi.org/10.1021/acs.est.5c16820
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Variability Analysis of Moisture Swing Sorbents in Passive Direct Air Capture Systems2025
  2. 2Comprehensive Structural Characterization of Charged Polymers Involved in Moisture-Driven Direct Air Capture2025
  3. 3Active Learning-Guided Optimization of Moisture Swing Adsorption for Direct Air Capture2026
  4. 4Quaternized Engineered Hydrogels for Subsaturated Moisture‐Driven CO <sub>2</sub> Capture2026
  5. 5Synergistic Hydrophobic‐Polar Microenvironments in Corrugated Channels Enable Exceptional Moisture‐Tolerant CO 2 Capture2026