RedNEO wrote: ↑27 Dec 2020, 14:17
DChemTech wrote: ↑27 Dec 2020, 13:59
RedNEO wrote: ↑27 Dec 2020, 13:42
How is it not clear to you yet? These climate neutral e-fuels don’t need extra carbon dioxide or farmland space/ forest space to increase fuel production, they only need to build more plants which (as you can see with Porsche) they are doing. They have all the carbon dioxide they need there’s plenty and it’s renewable. Do you think they’ve actually overlooked something as basic as availability before investing heavily?
Again, ....
As your yourself said, these fuels are made from agricultural waste. There is only so much agricultural waste, hence, there is only so much fuel that can be made from it. To quote, "How is that not clear to you yet?".
I don't think the F1 manufacturers overlooked that (just, you did). They just do what is logical from the perspective of people reliant on ICEs. They try to cling to every little option that they have. Logical, but from a systems perspective, not sensible. But I've already laid all of that out in previous posts, and vowed I would not be producing long replies that you will just ignore anyway. If you want to know more, just read back.
There isn’t just ‘one way’ or one thing you can extract co2 from. There are so many avenues so it’s really a non-issue that nobody else seems to be concerned about.
So, which ones then?
The systems analysis of biomass use a cited before shows you can produce about 1/5th of the transportation fuel requirement with biomass. That's at least first and second generation, don't know if they included algae too - don't have access to the paper right now. Anyway, algae are very area-intensive and most suitable to make protein or food-grade oils. They may contribute to biofuels but wont change the game.
Municipal waste? Plastic production accounts for only some 5% of crude oil use to begin with, with the rest being stationary and transport fuel. So all municipal waste will be only minor contribution. However, it makes more sense to recycle plastics to make new plastics. With that we can cover about 80% of new material production. The other 20% needs a fresh carbon source. Which one? Well, biomass. So actually, we will be using some biomass for materials production, instead of using materials for biofuel production.
Carbon from the air? There sure is enough. But as pointed out before, it's hugely energy intensive to get it out - it takes more energy to get out the car on that the fuel contains. And renewable energy is not limitless energy; for all but a few niche applications, it makes more sense to use the energy directly (e.g., put it in a battery and drive), than to spend it on getting carbon from the air. And once you do take carbon from the air, it makes more sense to fixate it for a long time (underground or in building material maybe) than to burn it and pump it back in. But we've told you this before, too. And every researcher I know in the biobased industry is aware of these limitations. Which does not deter us from using biomass, quite the contrary. But it does guide us to decide which future applications are sensible, and which are not. In the short run, biofuels in legacy ICEs are sensible. In the long run, maintaining ICE development is not.