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Updated: Jan 20, 2026

Solubility of Hydrophobic Compounds in Aqueous Solution Using Combinations of Self-assembling Peptide and Amino Acid
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Direct Air Capture Using Aqueous Amino Acid Solvents in a Crossflow Absorber.

Jorge Gabitto1, Abishek Kasturi2, Gyoung Gug Jang2

  • 1Chemical Engineering Department, Prairie View A&M University, Prairie View 77446, United States.

Industrial & Engineering Chemistry Research
|January 19, 2026
PubMed
Summary
This summary is machine-generated.

Direct air capture (DAC) removes carbon dioxide (CO2) to meet climate goals. This study optimizes crossflow absorbers for DAC by modeling how geometry and conditions affect efficiency, offering design improvements.

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Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Atmospheric Chemistry

Background:

  • Carbon dioxide (CO2) is the most abundant greenhouse gas, with atmospheric levels 50% higher than preindustrial times.
  • Direct air capture (DAC) is crucial for achieving global temperature targets by removing atmospheric CO2.
  • Traditional amine-based solvent absorption in packed columns faces challenges with large airflow rates in industrial DAC.

Purpose of the Study:

  • To investigate the impact of geometric parameters and operating conditions on the efficiency of crossflow absorbers for direct air capture.
  • To adapt a theoretical model for countercurrent absorbers to simulate and analyze crossflow DAC processes.
  • To provide practical design recommendations for enhancing the efficiency of industrial DAC processes.

Main Methods:

  • Modification of an existing theoretical model for countercurrent absorbers to simulate crossflow DAC absorber operation.
  • Development of a computer code based on the predictive model to analyze process efficiency.
  • Systematic variation of geometric equipment dimensions and operating parameters within the simulation.

Main Results:

  • The study identified key geometric and operational factors influencing product formation and process efficiency in crossflow DAC absorbers.
  • The adapted model successfully simulated crossflow absorber performance, allowing for the evaluation of various design scenarios.
  • Analysis revealed how changes in parameters like airflow and solvent rates affect the overall effectiveness of CO2 capture.

Conclusions:

  • Crossflow absorbers are suitable for large-scale DAC due to lower pressure drops compared to countercurrent columns.
  • Optimizing geometric parameters and operating conditions is essential for maximizing the efficiency of DAC processes.
  • The developed model and findings offer valuable insights for designing more effective and efficient direct air capture systems.