Almost all of our energy sources contain carbon (C) and hydrogen (H). As time passes we see a diversity in our energy sources. The table illustrates the most commonly used fuels and it’s hydrogen and carbon ratio. You can see a declining ratio of carbon and an increasing hydrogen ratio fuels are introduced into the energy mix.
The fuels with the highest ratio of Carbon are wood and coal. Coal, which is often regarded as bringing about the industrial revolution consist of Carbon, Oxygen, Hydrogen, Sulfur, and Nitrogen. The main energy in the 20th century, petroleum, propane and natural gas, are all compounds of only Carbon and Hydrogen, which are also know as hydro-carbons.
The compounds of C and H, such as petroleum, are called “hydro-carbon.” With this in mind, water is a compound of H and O, so it could be called “hydro-oxygen.” Non-carbon energy “Renewable Hydrogen” is the system of separating hydrogen from the water molecular bond and storing electricity in a chemical form to use later as electricity and heat. Renewable hydrogen is the final destination of an energy shift away from carbon that has a history of 200 years from the industrial revolution. The only zero carbon energy is Renewable hydrogen. When combined with oxygen and burned as a fuel or used as electricity in a fuel cell the only by-products are water and small amounts of heat.