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They could do better than bricks. They are making a component of mortar or concrete. This is already a construction material. https://en.wikipedia.org/wiki/Cal
by csours 3y ago
They could do better than bricks. They are making a component of mortar or concrete. This is already a construction material.
https://en.wikipedia.org/wiki/Calcium_oxide https://en.wikipedia.org/wiki/Calcium_oxide
- bobthepanda 3y agoTo get quicklime you have to burn at high temperatures, which is currently done using coke, so concrete is actually as high as 8% of carbon dioxide emissions.
- csours 3y ago> "At the California plant, workers heat limestone to 1,650 degrees Fahrenheit in a kiln powered by renewable electricity. Carbon dioxide is released from the limestone and pumped into a storage tank." Yes.
- deleted 3y ago[deleted]
- bobthepanda 3y agoI am pretty sure the OP is talking about storing carbon into the material itself, not producing it as an output and capturing it; hence the comparison to wood, which is carbon negative
- gumby 3y agoTrees aren't really carbon negative, but carbon neutral over an extended lifespan. They die and turn back into atmospheric CO2 (perhaps becoming even worse methane along the way) while their leaves continually do this over a short period. But the trees usually do this over a timescale of 20-220 years (less when there are fires or climactic change), so are much better than nothing. But they don't count as "permanent".
- bobthepanda 3y agoThey release their carbon when they decompose, but that's not really relevant if the wood is furniture or building materials.
- gumby 3y agoA tiny percentage of trees by volume. And a lot of that ends up in landfills either right away or after a few decades, where it starts to release GHGs.