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US 8,394,553 B2Granted
Hydrogen odorants and odorant selection method
AssigneeEnersol Inc., N.A.L.P.
InventorsPatrick J. Flynn, Michael Sprague
Life of this patent
Estimating the term…
Abstract
The present invention provides a method for evaluating the properties of hydrogen to improve the safety of hydrogen fuel, and provides a method for selecting proper odorants for hydrogen. Odorized hydrogen containing suitable odorants in appropriate concentrations with hydrogen are also provided.
Claims11
A fuel cell containing a hydrogen composition consisting essentially of:
- hydrogen;
- and an odorant selected from the group consisting of oxygen compounds, said odorant having a vapor pressure greater than 0.5 psi and having a smell detectable at less than 1 ppm by a human nose, wherein said oxygen compound is a ketone or an acrylate ester having a minimum olfactory power of 7.0, a minimum diffusivity of 0.01147 cm2/s and a maximum molecular weight of 200 g/mol.
A fuel cell containing a hydrogen composition comprising:
- hydrogen;
- and an odorant selected from the group consisting of oxygen compounds, said odorant having a vapor pressure greater than 0.5 psi and having a smell detectable at less than 1 ppm by a human nose, wherein said oxygen compound is a ketone or an acrylate having a minimum olfactory power of 7.0, a minimum diffusivity of 0.01147 cm2/s and a maximum molecular weight of 200 g/mol, and wherein said oxygen compound comprises 2,3-butanedione.
A fuel cell containing a hydrogen composition comprising:
- hydrogen;
- and an odorant selected from the group consisting of oxygen compounds, said odorant having a vapor pressure greater than 0.5 psi and having a smell detectable at less than 1 ppm by a human nose, wherein said oxygen compound is a ketone or an acrylate, having a minimum olfactory power of 7.0, a minimum diffusivity of 0.01147 cm2/s and a maximum molecular weight of 200 g/mol wherein said odorant further comprises a selenium compound.
Dependencies are inferred from the claim text.