A thread in PARF mentioned this topic:
"Why are we not ...snip...pulling CO2 from the air using late 1800s chemistry to make propane to run our vehicles and trains? Best bit is using CO2 already in the air makes that fuel a closed carbon source."
It is a neat bit chemistry. I do wonder about sourcing the H2. If water is the main source and we use electrolysis, would solar provide enough energy to support the enormously large-scale production needed?
Sourcing the H2 from water which is not an infinite supply is also problematic, but we need to start somewhere.
Any other nerdy types here familiar with this or have interesting input?
https://onlinelibrary.wiley.com/doi/10.1002/anie.201910579