Appreciate you starting the discussion. Some points I would like to provide my views on:
I disagree. If you look at blue hydrogen, methane is the feedstock that needs to be combusted. So neither is methane infinite nor is steam methane reforming highly efficient. The more popular option of water splitting by electrolysis requires electricity which, wait-for-it, is going to come from guzzling fossil fuels. So hydrogen production for clean energy applications by actually burning fossil fuels? Seems like the snake biting its own tail. The more sensible approach to combine this partially with renewable energy i.e. solar-assisted water splitting, but despite thousands of published papers and patents, I don’t see a commercially viable/established working model.
If repurposing existing pipelines were that easy or straightforward, the oil & gas industry would have found a way to do that much earlier. For example- hydrogen embrittlement is a phenomenon that degrades and destroys even nuclear vessel steel, let alone your run-of-the-mill oil & gas pipes.
Imagine even a minuscule leakage of a hydrogen-carrying pipeline means it is a bomb due to easy access to atmospheric oxygen.
All said and done, it makes more sense to use hydrogen (blue/green/grey/brown) in steel/iron/non-ferrous metals production plants and power plants rather than as inefficient batteries or automobile fuel.
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