Slide 6 of 44
Notes:
*come from: hydrogen is not an energy source. Hydrogen is an energy carrier, functioning like electricity by delivering energy between points of production and points of utilization.
- Produced today: hydrogen is a common material but exists mostly in chemically bonded forms such as in water or organic materials. Some form of energy must be available to liberate it from binding, enabling it to be a fuel. Hydrogen production involves tapping into primary energy sources such as fossil fuels, wind, water, or sunlight to strip hydrogen from molecules found in nature.
- Most common primary source of H is natural gas, which consists mostly of methane. The overall efficiency of converting natural gas to hydrogen is between 70 and 80 percent; future systems may reach 85 % efficiency. About 5% of the natural gas used in the U.S., or 1% of the energy produced, is transformed into hydrogen gas by way of steam methane reforming.
