Gaseous Lubricity Additives for Hydrogen Gas
Year: 2025
Type: article
Abstract: There is great interest in using hydrogen as a gaseous fuel in combustion engines to eliminate CO2 emissions. Unfortunately, hydrogen gas is a poor lubricant for most engineering metals and an effective lubrication solution for pumping and injecting hydrogen is required. This study explores the possibility of additivating hydrogen with a low concentration of a lubricious gas to reduce friction and wear. We find that unsaturated hydrocarbon gas additives form protective carbon-based tribofilms, while gaseous ammonia and amine additives form nitrogen-based films on steel surfaces during rubbing in additivated hydrogen. Gaseous amines are particularly effective in reducing friction and wear, even at concentrations as low as 100 ppm mole/mole. This demonstrates that the addition of a small concentration of lubricious gas is a feasible way to improve the lubricity of gaseous hydrogen.
Source: Figshare
Authors: Zhang, Jie, Bolle, Bastien, Yin, Shouyi, Bera, Tushar, Wong, Janet S. S., Spikes, Hugh
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6902385780
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