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Hydrogen, until recently, was considered too expensive to produce and too dangerous to be considered a mainstream fuel source for utility and transportation applications. The solid hydrogen metal hydride technology being advanced by HES has changed that!
Our system is safe, reliable, efficient & renewable.
The system satisfies California’s SULEV and PZEV tailpipe emission standards. Using and ICE/GENSET for utility applications or an ICE automotive engine, our technology meets the California SULEV and PZEV emission standards which we believe to be the most strict to date.
The data below represents the emissions from a 2005 Toyota Prius electric /gas hybrid converted to run 100% on H2 using the solid hydrogen technology. Unlike high pressure storage systems that require fueling pressures of over 6000 psi, our system is refueled at a pressure of only 1500 psi. Reduced fueling pressure enables savings in hydrogen compression costs, resulting in a lower delivered fuel cost. Shortly after refueling, vehicle operation causes pressure in the vessel to drop from 1500 psi to 300 psi, where it remains until the next refueling.
In the same physical space , our current system will store almost three times as much hydrogen as a 5000 psi compressed/pressurized tank. The chart below indicates the low emissions from our system using State of California Emissions Standards:
Vehicles |
HC
(g/mi.) |
CO
(g/mi.) |
NOx
(g/mi.) |
CO2
(g/mi.) |
City Fuel
economy |
Highway
Fuel
economy |
2005 Ovonic Hydrogen
Hybrid Vehicle |
0.001 |
0.002 |
0.014 |
1.6 |
54-56
mi./kg |
50-53
mi./kg |
2005 Commercial (Gasoline)
Hybrid Baseline |
0.004 |
0.386 |
0.004 |
176.6 |
52
mi./kg |
48
mi./kg |
SULEV/PZEV
Standard |
0.010 |
1.0 |
0.020 |
na |
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SULEV - Super Ultra Low Emission Vehicle
PZEV - Partial Zero Emission Vehicle
HYDROGEN USE AND SAFETY :: CALIFORNIA HYDROGEN HIGHWAY |
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At the same pressure, solid storage solution is 30 times smaller than gaseous H2 storage
ADVANTAGE OF METAL HYDRIDES

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