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Karsten Capion @karstencapion.bsky.social · 08/06/2026

I would assume Lithium-air batteries will gain weight as they discharge and solid lithium turns into lithium oxide. On the other hand the most important factor for short-haul is take-off weight, so likely it's not a major problem.

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Karsten Capion @karstencapion.bsky.social · 16/02/2026

As naphtha is liquid, why is that not a better starting point for storable fuels than C2-C4?

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Karsten Capion @karstencapion.bsky.social · 02/02/2026

There is an amazing opportunity for the #EUETS #CBAM in taking upstream emissions into account. As most emissions can be abated at much lower costs than the current 85 €/tonCO2e it would incentivise lots of reductions.

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Karsten Capion @karstencapion.bsky.social · 12/01/2026

Har du overblik over hvor stor en del af fiskeriets brændstof, der er afgiftsbelagt og hvor stor en del der kan opnå refusion? (kystrejetrawlere er vel kun en mindre del af fiskeriet?) Det ser ud til, at man ved årsskiftet har justeret afgifterne en del. www.regjeringen.no/no/tema/okon...

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Karsten Capion @karstencapion.bsky.social · 23/10/2025

Speaking of not being given other options… use of hydrogen for carbon based fuels (e.g. aviation fuel) is a poor use of ressources. Just store the carbon needed for synthesis instead. concito.dk/en/udgivelse...

concito.dk

E-fuels or storage – how to make the most of clean electricity and captured CO2

Clean electricity and captured CO2 have multiple uses. Regulation should aim for prioritizing these resources for applications with the highest climate benefit

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Karsten Capion @karstencapion.bsky.social · 02/07/2025

Thanks for sharing the numbers! Did you make a table? It seems relevant to try to construct a carbon storage supply curve. If the value of additional storage is 100-300 €/ton CO2, then I would suspect you could find significant additional room underground.

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Karsten Capion @karstencapion.bsky.social · 24/06/2025

Has anyone looked into using CaO instead? Same result but only 30 % of the mass. Calcination with CCS would need to be done on land.

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Karsten Capion @karstencapion.bsky.social · 23/04/2025

Thanks for sharing! Have you made any assessments of how the overall ESR target compliance is coming along? www.transportenvironment.org/uploads/file...

transportenvironment.org

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Karsten Capion @karstencapion.bsky.social · 08/04/2025

Any recording of your keynote or link to the presentation?

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Karsten Capion @karstencapion.bsky.social · 21/03/2025

If its “long-term” you could bring down temperatures again using negative emissions. Question is who is going to pay.

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Karsten Capion @karstencapion.bsky.social · 20/03/2025

Thanks! Flaring is bad, but also a much smaller problem than energy use.

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Karsten Capion @karstencapion.bsky.social · 17/03/2025

And higher EU ETS prices. Do you have the numbers for energy use emissions?

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Reposted by Karsten Capion

Søren Have @sorenhave.dk · 12/03/2025

🛫 More routes to climate-neutral aviation! 🛫 In a new CONCITO paper we argue for using green electricity and captured CO2 separately, as: - The climate benefit is double that of e-kerosene - This displaces more fossil fuel - It is more cost efficient. Read more here -> concito.dk/en/udgivelse...

Graph of the climate benefit from a kWh of green electricity used on various purposes, clearly showing that e-fuels is last in line

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Karsten Capion @karstencapion.bsky.social · 03/03/2025

What about round trip efficiency? I’ve heard they’re unfortunately only getting about 50 %.

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Karsten Capion @karstencapion.bsky.social · 03/03/2025

Do you have a graph showing fuel costs in USD/litre?

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Karsten Capion @karstencapion.bsky.social · 11/02/2025

Yes. When assuming that the upgrading plant is paid for and in operation already it’s fairly cheap to transport and store the CO2 removed in upgrading.

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