Hydrogen electrolyzer can extract a gallon of hydrogen from 3 gallons of water and can drive a hydrogen fuel cell vehicle as far as a vehicle travels today on a gallon of gasoline.
* 1 gallon water = 0.38 kg hydrogen > 27 miles in the FCX Clarity
* 1 liter water = 0.10 kg hydrogen > 12 kilometers in the FCX Clarity
Proton Energy Systems, Honda Media Newsroom, US Environmental Protection Agency
Solar hydrogen experimentation system, consisting of solar module, PEM Electrolyzer, hydrogen and oxygen storage tanks, PEM fuel cell and fan (for electric load); mounted on a black base plate.
Electrolyser: 1 WFuel cell: 500 mWGas storage: 30 cm3 H2;30 cm3 O2Solar module: 2.0V / 350 mAFan: 10 mWH x W x D: 100 x 300 x 150 mmWeight: 6
Electricity needed to power up electrolyzer to produce hydrogen.
When stored as a gas at a pressure of 20MPa:
1 liter contains 0.53kWhEnergy efficiency of electrolysis - roughly 50%. 1.06kWh of electricity to produce 1 liter hydrogen.
When stored as a gas at 24.8MPa1.28kWh = 1 liter hydrogen
When stored as a gas at 30MPa1.50kWh = 1 liter hydrogen
When stored as a liquid at 20K4.72kWh = 1 liter hydrogen
When stored as a metal hydride6.36kWh = 1 liter hydrogen
The amount of energy stored in 1 kilogram of hydrogen.
One gallon of gasoline has about the same energy as one kilogram (1000 grams, which is about 2.2 lbs.) of hydrogen gas. 33.4 kilowatt hours of electricity is equivalent (in energy) to one gallon of gasoline (114,000 BTU); this means 33.4 kilowatt hours is also equivalent (in energy) to one kilogram of hydrogen gas.
Source/s:American Energy Independence
Energy supply and demand often do not occur at once. There are off times in the use of energy converted by Solar cells and wind power plants. This is where hydrogen electrolyzer comes into play, as a technology for independent energy generation.
At the end of the day, Making-Hydrogen.com is about how to create hydrogen from solar power to bacteria! What is the coolest way you have discovered in making hydrogen?