Am I missing something or is this something between misleading and a scam ?
Jul. 22nd, 2025 02:24 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
Sub-head: The first commercial carbon capture system for boats has set sail
https://thenextweb.com/news/cargo-ship-turning-co2-into-cement
Seabound’s carbon capture equipment traps the exhaust gas produced by the vessel’s huge diesel engines and funnels it into a big, high-pressure chamber filled with calcium hydroxide pebbles. The CO2 in the exhaust gas reacts with the pebbles and transforms into calcium carbonate — also known as limestone, the key ingredient in cement.
Whilst that is true, the next bit
That limestone is stored onboard and will be offloaded in Norway, where it will be delivered to Heidelberg Materials’ cement plant in Brevik. There, it will be used to produce greener concrete on an industrial scale
is highly misleading. Cement manufacture starts by using vast amounts of energy to turn calcium carbonate into calcium hydroxide. Thus this cleaning up of the exhaust gases is of no benefit to the cement industry.
They could use clean energy to turn the carbonate back into hydroxide, making the ship carbon neutral, but why not use use the clean energy on the ship in the first place ?
I suppose that the pebbles/cement and diesel might be lighter and smaller than a sufficiently powerful solar/wind system and safer than storing green hydrogen ... It might also be a useful stopgap until shipping is electrified.
It wont even stop us from ripping up mountains for the limestone to make the cement.
Am I missing something or is this really something between misleading and a scam ?