Hydrogen for transport is a really tricky area to navigate as it comes in a whole bunch of ‘colours’ depending on how the hydrogen is made. Grey is split from natural gas, green from water electrolysed from renewable electricity and a bunch of different shades in between those two. There are a number of things that need to be considered but the main one is The global market for hydrogen is already huge – its primary use is in the Heinz-Krebb process in fertiliser manufacturing. It’s also worth noting that hydrogen is never transported as for practical reasons it’s always made (from natural gas) at point of use as it’s a tricky molecule to contain. It also does nasty things to steel as it can work its way between the molecules of the container. So, if decarbonisation is the goal – fix the industrial processes first that can only use hydrogen by converting to green hydrogen.
There are also a heap of reasons why we shouldn’t consider hydrogen for transportation asides from the fact that engineering wise it’s crazy to have hydrogen hanging around for longer than absolutely necessary:
it’s energy inefficient- at least 3 times more power hungry than BEV in round trip efficiency (that means 4 times more solar panels, wind turbines and hydro installations)
it’s easily hijacked by the fossil fuel industry and grey substituted for green
it’s not energy dense
it’s already in high demand for industrial processes (as previous)
if you split it from gas it uses several times more gas to achieve the same energy (great if you’re in the gas selling business)
on the point that EV’s are impractical for Aussies – yes, there are some charging limitations at the moment, but containerised solar charging stations can and are being deployed off grid for remote areas and the major mining companies are converting their heavy and light fleets to electric simply because you can make it on site rather than truck it in from 1000’s of kms away. I also knock out over 40,000km a year commuting in my BEV, (70% self powered too) so it’s hard to make that point.
I guess hydrogen cars… well it’s a bit like saying we should be running coal fired steam engines. Yes, it can be done, but it’s not exactly a good use of resources…..