Technology

That is good but the specfic equipment needs to run on the energy created. Mining equipment and manufacturing. So if the mining equipment is all electrical then there will be loses in the energy harvested. As far as I know this is an open question. So theoretically the energy is surplus but can just the energy of the wind and solar completely power the equipment. Currently they do not as we use fossel fuel equipment. Of course the energy of the construction of equipment needs to be taken into consideration as well. Also manufacturing that uses massive heat tends to use fossil fuel. Don't get me wrong im not trying to disparage wind/solar. Far from it but last I knew we have not gotten to were we have unhooked fossil fuel from the process so currently it acts as a sort of energy multiplier where rather than burning oil for X amount of energy we can use it as part of the mining/construction process of wind/solar and get that multiplier fro eroi. this is why this article is big to me as its creating fuel which could possibly take fossil fuel out of the solar/wind creation process. at least I hope.

The tech has been known for decades. It just needs clean hydrogen. You can either go the hydrogen fuel cell route, or combine it with CO2 to make liquid fuel, but the source of hydrogen is the crux of the problem.

Im bigger on the fan producing enough fuel for the mining and construction of it and the facility and maintenance and upkeep. This has been a re-occuring point of can we create wind and solar panels just from wind and solar panels without digging up oil. As for sequestration. What is the point if we are still digging up oil and refining it into the same fuel??? I could see it being something if we were otherwise not digging up hydrocarbons but I fail to see how sequestration is better than replacement while we are doing that.

There is biochar which can be scaled by providing cheap pyrolysis retorts and training how to bioactivate it. Incentive is increased agriculture productivity long-term. Capture should be done directly from flue gas since not needing enrichment. There are also carbon-negative concretes which have good potential for capture.

Synfuels from 100% renewable are at least carbon neutral, which is as good as it gets.

Yes, of course. But climate change is also costly you know ...

Don't forget lubricants, polymers and chemical feedstock in general.

Agreed, aviation and special vehicles like firetrucks for those kinds of vehicles eFuels MIGHT be suitable, but it for sure should not be used in the day-to-day car used by everybody.

The more interesting approach is synmethanol, particularly via electrosynthesis. Only half of energy density of gasoline, and suitable for fuel cells, including DMFCs.