Scientists know how to phase out fossil fuels. These countries might be 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

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

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    • BlackLaZoR@lemmy.world
      44·
      25 days ago

      How are you going to move large passanger planes to renewable power? Or trucks? Get failed Tesla Semi from Elon Musk?

        • BlackLaZoR@lemmy.world
          13·
          25 days ago

          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

          • TwoTiredMice@feddit.dk
            3·
            25 days ago

            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.

            • BlackLaZoR@lemmy.world
              11·
              25 days ago

              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

              • TwoTiredMice@feddit.dk
                2·
                25 days ago

                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.