Hydrogen Purity: Influence of Production Methods, Purification Techniques, and Analytical Approaches

Yunji Kim and Heena Yang ()
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Yunji Kim: Water Energy Research Center, Korea Water Resources Corporation, Daejeon 34045, Republic of Korea
Heena Yang: Water Energy Research Center, Korea Water Resources Corporation, Daejeon 34045, Republic of Korea

Energies, 2025, vol. 18, issue 3, 1-22

Abstract: Hydrogen purity plays a crucial role in the expanding hydrogen economy, particularly in applications such as fuel cells and industrial processes. This review investigates the relationship between hydrogen production methods and resulting purity levels, emphasizing the differences between reforming, electrolysis, and biomass-based techniques. Furthermore, it explores state-of-the-art purification technologies, including pressure swing adsorption (PSA), membrane separation, and cryogenic distillation, highlighting their effectiveness and limitations in achieving ultra-pure hydrogen. Analytical methods such as gas chromatography, mass spectrometry, and cavity ring-down spectroscopy are also discussed in terms of their accuracy and application scope for hydrogen quality assessment. By integrating findings from global and domestic studies, this paper aims to provide a comprehensive understanding of the challenges and advancements in hydrogen purity, offering insights into optimizing hydrogen for a sustainable energy future.

Keywords: hydrogen purity; hydrogen production; purification technology; energy transition; electrolysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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