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One thing I haven't seen is analysis if carbon capture from air or weathering rocks is better. Carbon capture has been promoted as way to make fossil fuel plant
by ianburrell 3y ago
One thing I haven't seen is analysis if carbon capture from air or weathering rocks is better. Carbon capture has been promoted as way to make fossil fuel plants green, and does have advantage of working better on concentrated exhaust.
But carbon capture will really be needed once fossil fuel plants are gone.
I think weathering rocks may be the better option. It doesn't require any new technology. It would be similar to mining but with steps to crush the rock and either spread it or dump in ocean. We could use electrified version of existing equipment.
- sanderjd 3y agoMy take from reading and listening to things about this is: the jury is still out. All of these ideas are very early in their learning curves, so it seems the relative slopes of those curves is still a very open question.
- ianburrell 3y agoLuckily, we have a couple of decades before need to do carbon capture. For now, it is better to focus on retiring fossil fuels.
- sanderjd 3y agoI've said this in a couple other comments, but my perspective on this is: That's why it's awesome people are working on it now! When you still have a couple decades to travel up the learning curve is exactly the right time to work in earnest on a nascent technology. It's a great thing that people started working on wind and solar power a few decades ago!
- hedora 3y agoDirect air carbon capture refers to pulling the carbon out of the atmosphere, regardless of the process (weathering rocks, using catalysts, etc). Most processes perform better with a higher percentage of CO2 in the intake, so most could be stuck on a smokestack (or in an urban center).