Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element….
| Hydrogen | |
|---|---|
| Standard atomic weight Ar, std(H) | [1.00784, 1.00811] conventional: 1.008 |
| Hydrogen in the periodic table |
What is the energy value of hydrogen?
120 MJ/kg
On a mass basis, hydrogen has nearly three times the energy content of gasoline—120 MJ/kg for hydrogen versus 44 MJ/kg for gasoline.
How much energy is in a Litre of hydrogen?
Hydrogen at 50 atmospheres pressure provides about 0.13 kilowatt-hours per litre, and liquid hydrogen provides 2.36 kilowatt-hours per litre. (Petrol or oil provide about 10 kilowatt-hours per litre.)
What is energy density of hydrogen?
approximately 120 MJ/kg
By contrast, hydrogen has an energy density of approximately 120 MJ/kg, almost three times more than diesel or gasoline. In electrical terms, the energy density of hydrogen is equal to 33.6 kWh of usable energy per kg, versus diesel which only holds about 12–14 kWh per kg.
What is the higher heating value of hydrogen?
| Fuel | Density | Higher Heating Value (HHV) (Gross Calorific Value – GCV) |
|---|---|---|
| @0°C/32°F, 1 bar | ||
| Hydrogen | 0.090 | 39.4 |
| Methane | 0.716 | 15.4 |
| Natural gas (US market)* | 0.777 | 14.5 |
How much energy is 1kg of hydrogen?
1 kg of hydrogen contains 33.33 kWh of usable energy, whereas petrol and diesel only hold about 12 kWh/kg (see ).
How far can a car travel on 1 kg of hydrogen?
In any of the latest fuel cell cars, 1 kg of hydrogen will let you drive 97 – 100 km.
How much electricity does it take to produce 1 kg of hydrogen?
A 100% efficient electrolyser requires 39 kWh of electricity to produce 1 kg of hydrogen. The devices today require as much as 48 kWh/kg. So, if electricity costs are 0.05 US$/kWh, the power cost for the electrolysis process alone is 2.40 US$/kg of hydrogen.
What is the density of hydrogen at 700 bar?
42 kg/m3
So, at 700 bar, which is 700 times normal atmospheric pressure, hydrogen has a density of 42 kg/m3, compared with 0.090 kg/m3 under normal pressure and temperature conditions. At this pressure, 5 kg of hydrogen can be stored in a 125-liter tank.
