One exception to note: If the food's sitting in an environment where the temperature is over 90Â°F, the USDA says the food should only be left out for one hour, so keep an eye on the clock if you're serving food on a hot day!
Estimated cost of hydrogen per kilogram in a variety of scenarios. With all of this in mind, here are the cost estimates per kilogram (which each include $1.25 for taxes): Hydrogen from natural gas (produced via steam reforming at fueling station). $4 â $5 per kilogram of hydrogen.
Most hydrogen dispensers provide hydrogen fuel at two different pressures: 35 and 70 MPa. The hydrogen gas compressed to 70 MPa is more dense than 35 MPa hydrogen fuel, which means that more fuel at 70 MPa can be contained in the same fuel tank volume. FCEVs that run and store 70 MPa hydrogen fuel typically have greater driving range.