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Connecting Material Characteristics with System Properties for Membrane-Based Direct Air Capture (m-DAC) Using

Vitor Gama1, Deepanjali Roy1, Fernando V Lima1

  • 1Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia 26506, United States.

Industrial & Engineering Chemistry Research
|April 28, 2025
PubMed
Summary
This summary is machine-generated.

This study models membrane-based direct air capture (m-DAC), a negative emissions technology. It maps membrane properties to CO2 capture performance and cost, aiding the design of scalable solutions.

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Environmental Science

Background:

  • Direct air capture (DAC) is crucial for climate change mitigation.
  • Membrane-based DAC (m-DAC) offers potential economic advantages over sorption-based methods due to continuous operation and no costly regeneration.
  • Facilitated transport membranes show promise for enhanced CO2 capture performance.

Purpose of the Study:

  • To develop a process modeling approach for a two-staged m-DAC system.
  • To link material characteristics and membrane properties to system-level performance metrics.
  • To utilize inverse design for optimizing membrane properties for desired CO2 capture outcomes.

Main Methods:

  • Process modeling of a two-staged m-DAC system.
  • Analysis of material characteristics and membrane separation properties (CO2 apparent diffusion coefficient, equilibrium constant).
  • Mapping of membrane properties to CO2 recovery, purity, and capture cost.
  • Application of inverse design for targeted membrane property determination.

Main Results:

  • Established a framework connecting membrane properties to m-DAC performance.
  • Identified feasible output spaces for CO2 recovery, purity, and cost.
  • Demonstrated the use of inverse design to specify required membrane properties for target system outcomes.

Conclusions:

  • The developed model provides a pathway for designing cost-effective and scalable m-DAC systems.
  • This research supports membrane researchers in optimizing material properties for efficient CO2 capture.
  • The study contributes to advancing negative emissions technologies through improved membrane design.