Robotic 'trees' can turn CO2 into concrete
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Robotic 'trees' can turn CO2 into concrete
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Re: Robotic 'trees' can turn CO2 into concrete
#2Every time one of these articles come up I wonder about the price per tonne of CO2 removed by simply growing wood and not burning it. I'm not really sure what that price is, but it seems to be around $20-$40 per tonne? Does anyone have a more accurate number?
Re: Robotic 'trees' can turn CO2 into concrete
#3I wish more people realized the concrete thing is snake oil.
When you make cement, you heat up natural CaCO3 -> CaO + CO2. The heat itself also requires combustion, so more CO2.
Some cements have perhaps 10% CaCO3 added to their mix. It’s not so much desirable as cheap filler.
What the media fails to realize is pumping CO2 into curing cement reverses the CaO reaction. In other words, every CO2 molecule you capture releases 2 or more. You’d be better off using less CaO and more CaCO3 to begin with.
Re: Robotic 'trees' can turn CO2 into concrete
#4Every time one of these articles come up I wonder about the price per tonne of CO2 removed by simply growing wood and not burning it. I'm not really sure what that price is, but it seems to be around $20-$40 per tonne? Does anyone have a more accurate number?
Rotting wood releases carbon dioxide too.
Re: Robotic 'trees' can turn CO2 into concrete
#5Every time one of these articles come up I wonder about the price per tonne of CO2 removed by simply growing wood and not burning it. I'm not really sure what that price is, but it seems to be around $20-$40 per tonne? Does anyone have a more accurate number?
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Re: Robotic 'trees' can turn CO2 into concrete
#6Every time one of these articles come up I wonder about the price per tonne of CO2 removed by simply growing wood and not burning it. I'm not really sure what that price is, but it seems to be around $20-$40 per tonne? Does anyone have a more accurate number?
If the purpose is carbon sequestration, you'll have to include the cost of storing that wood. Indefinitely. Won't be cheap.
Re: Robotic 'trees' can turn CO2 into concrete
#7Every time one of these articles come up I wonder about the price per tonne of CO2 removed by simply growing wood and not burning it. I'm not really sure what that price is, but it seems to be around $20-$40 per tonne? Does anyone have a more accurate number?
If the purpose is carbon sequestration, you'll have to include the cost of storing that wood. Indefinitely. Won't be cheap.
You'll also need to store it in a way that does not release the wood's CO2 back to the atmosphere by biodegradation.
Re: Robotic 'trees' can turn CO2 into concrete
#8Earlier quoted context omitted.
If the purpose is carbon sequestration, you'll have to include the cost of storing that wood. Indefinitely. Won't be cheap.
You'll also need to store it in a way that does not release the wood's CO2 back to the atmosphere by biodegradation.
If you turn it into charcoal you keep most of the carbon locked up in a non-biodegradable form.
Re: Robotic 'trees' can turn CO2 into concrete
#9Every time one of these articles come up I wonder about the price per tonne of CO2 removed by simply growing wood and not burning it. I'm not really sure what that price is, but it seems to be around $20-$40 per tonne? Does anyone have a more accurate number?
If the purpose is carbon sequestration, you'll have to include the cost of storing that wood. Indefinitely. Won't be cheap.
You could sell it, maybe trick people into doing stuff with it, like making buildings or durable goods.
Re: Robotic 'trees' can turn CO2 into concrete
#10Earlier quoted context omitted.
If the purpose is carbon sequestration, you'll have to include the cost of storing that wood. Indefinitely. Won't be cheap.
You could sell it, maybe trick people into doing stuff with it, like making buildings or durable goods.
Best comment I have read all day.