What question did this study set out to answer?

To evaluate the carbon dioxide capture efficiency and energy consumption of an absorption-assisted hollow fiber membrane contactor designed for direct air capture.

September 17, 2026Separation and Purification TechnologyOpen Access

Experimental validation and modeling analysis of an absorption-assisted hollow fiber membrane contactor for direct air capture

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To evaluate the carbon dioxide capture efficiency and energy consumption of an absorption-assisted hollow fiber membrane contactor designed for direct air capture.
Conducted experimental direct air capture tests in axial- and cross-flow configurations across various air flow rates using potassium hydroxide (KOH), monoethanolamine (MEA), and methyldiethanolamine (MDEA) solvents.
Formulated and validated a two-dimensional single-fiber transport model incorporating gas-phase mass transfer resistance, membrane diffusion, reaction kinetics, and solvent solubility.
Demonstrated strong agreement between experimental capture data and the two-dimensional single-fiber predictive model across tested solvents and flow regimes.
Identified solvent concentration, air velocity, membrane fiber thickness, and packing density as the primary parameters dictating carbon dioxide productivity and specific energy consumption.
Found that the cross-flow contactor using potassium hydroxide solvent achieves carbon dioxide capture productivity and energy efficiency that match or outperform existing benchmark liquid-based direct air capture contactors.

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Implication

Experimental and modeling study demonstrates efficient direct air capture using cross-flow hollow fiber membrane contactors, indicating potential to outperform existing liquid-based benchmarks.

Cite This Study

Petersen et al. (2026) studied this question.

synapsesocial.com/papers/6aabb61e5f706d05830e48f6 https://doi.org/10.1016/j.seppur.2026.140067

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Implication

Experimental and modeling study demonstrates efficient direct air capture using cross-flow hollow fiber membrane contactors, indicating potential to outperform existing liquid-based benchmarks.

Experimental validation and modeling analysis of an absorption-assisted hollow fiber membrane contactor for direct air capture

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Implication

Cite This Study

Experimental validation and modeling analysis of an absorption-assisted hollow fiber membrane contactor for direct air capture

Key Points

Discussion

Implication

Cite This Study

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