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Wouldn't it be more efficient to remove CO2 from the sea where it has been accumulating as the oceans act as sinks for atmospheric pollutants and ocean acidific
by m0llusk 5y ago
Wouldn't it be more efficient to remove CO2 from the sea where it has been accumulating as the oceans act as sinks for atmospheric pollutants and ocean acidification is actually more of a problem in the short term?
- deleted 5y ago[deleted]
- MicahKV 5y agoBeen a while since I read up on this, but I think the problem is the energy cost of extracting CO2 from sea water makes it a wash at least in terms of CO2 reduction.
- MobiusHorizons 5y agoI had this thought too, an aqueous solution feels like it ought to be much easier to do chemistry with. But I haven’t heard of anyone working on it.
- aembleton 5y agoHere's a possible solution - add sodium to the fuel mix for cargo ships. That's massively simplified, but this video gives more information and there are plenty of engineering challenges to overcome - https://www.youtube.com/watch?v=hL3AZGw9xZM https://www.youtube.com/watch?v=hL3AZGw9xZM
- pfdietz 5y agoThe concentration (in moles/volume) of CO2 in the ocean is higher than in the air, so it's not a bad idea. One proposal was to do this electrolytically or by electrodialysis. This has been called "Direct Ocean Capture". http://carbon.ycombinator.com/electro-geo-chemistry/ http://carbon.ycombinator.com/electro-geo-chemistry/ This may be considerably cheaper as a CO2 removal technology than DAC.