I love all the colours chosen for a gas that has none. There is no smell either. Pink, green, blue, grey, black, yellow, white, maroon… I’m making them up now, but it doesn’t matter. There is an odour coming from this “new hydrogen economy”. Hydrogen is not an “energy source”. It’s how we can transport energy. From where it’s made to where it’s consumed. The colours are a clever way of identifying the source of the energy before conversion into hydrogen. But be clear, hydrogen is not a “fuel” that replaces “fossil fuels”. Lithium is useless until energised in a Li-Ion battery. Hydrogen is useless until you make it, or rather separate it, from it’s most common bonded atomic partner – Oxygen. Then again I do enjoy a good drink of oxidised hydrogen. The most common form of hydrogen on earth – water – is not useless at all.
Hydrogen on the surface is “better” than hydrocarbons. It has twice the energy density. Fossil fuels, incidentally are stores of energy: you dig them up, or pump them out, and immediately convert them to heat. Remember that our most common need for energy is low cost heat. Hydrogen as a fuel is yet to find that low cost convertibility to a low priced, abundant fuel. It is easier to transport the energy via electrons, than lug around a much heavier proton with a electron attached to it.
For pipes and storage tanks, the metallurgy of hydrogen makes problems because it can embrittle many materials. It’s a very small molecule and creeps into all kinds of places. Hydrogen has a very wide explosive range: 4 to 74%, and will ignite with sunlight. It’s tricky stuff to work with.
I don’t see hydrogen becoming anything other than another energy distraction. Much the same way that ethanol was 20 years ago. But we are not adept at learning from our mistakes. There will be regions that will benefit for reasons other than are written here.
Hydrogen has a very wide explosive range: 4 to 74%, and will ignite with sunlight. It’s tricky stuff to work with.
Thorium Molten Salt Fission Energy technology making electricity is a viable proposition. The technology hurdles where identified and addressed more than 50 years ago. Yes, hydrogen production using Molten Salt Technology is a very viable option – where it is needed. The Energy Return on Investment (EROI) of energy from Molten Salt Fission Energy Technology is 30 times better than any oil equivalent and 512 times better than wind and solar. (Anyone remember fuel ethanol? The EROI is somewhere between 0.9 and 1.1 – pitiful).
Let those numbers sink in… That’s where you’ll find the real gold at the end of the rainbow.
Jeremiah Josey
Founder, The Thorium Network
The Thorium Network 
Very nice picture and a quite unique way to use poetry to explain how Hydrogen works
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