Scientists know how to phase out fossil fuels. Some countries are listening
(www.scientificamerican.com)
Representatives of more than 50 nations gathered in Santa Marta, Colombia, this week at what was billed as the first global summit on phasing out fossil fuels. A panel of scientists will be advising them
Archived copies of the article:
No they don't. You can phase it out of electricity production through nuclear and renewables, but theres currently no answer for most other usecases
What? I am not sure your point is clear here.
How are you going to move large passanger planes to renewable power? Or trucks? Get failed Tesla Semi from Elon Musk?
I believe the aviation industry is betting on ESAF which is synthetic fuel derived from renewable energy.
https://www.bp.com/en/global/air-bp/news-and-views/views/what-is-esaf.html
Using Fischer-Tropsch (FT) synthesis
That's completely infeasible financially. What you liked is a propaganda piece.
Even if you used ammonia as fuel, the round trip efficiency is like 17%, steam reforming into regular jet fuel is probably even worse since production has three steps instead of two.
And If you consider cost of electricity alone this turns into a pipe dream
Even if you used ammonia as fuel, the round trip efficiency is like 17%
Do you have any sources backing this up?
And also, I mentioned eSAF, not SAF. There's a difference.
Don't have an article at hand. I've seen this in two places, one article back when I was looking into it, and the other was one of Sabine Hossenfelder videos about fuels.
Numbers in both sources were similar
I think the effiency of eSAF is closer to be around 35-50 %, but I am by no means an expert in PtX (PtL).
But it is still extremely expensive, 6x more expensive than normal jet fuel. And the goal in EU is that by 2030 0.7 % of the fuel mix is eSAF.
I think the biggest challenge is the infrastructure. We are having issues with negative power prices in EU, more eSAF production can be one solution to a more stable grid in places with a high penetration of renewable energy production.
