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When 1 tonne of olivine weathers, the chemical reaction removes 1.25 tonnes of free CO2 from the environment in terms of stoichiometry. However, in the process
by matznerd 7y ago
When 1 tonne of olivine weathers, the chemical reaction removes 1.25 tonnes of free CO2 from the environment in terms of stoichiometry. However, in the process of mining, milling, and transporting that olivine to that beach, we emit approximately .05 tonnes of CO2 ourselves. That .05 of a tonne is 4% of the 1.25 tonnes of CO2 that was removed in the weathering process. So, in a CO2 life cycle assesment of net emissions, that considered the "loss."
- jointpdf 7y agoi.e. it’s like a slot machine where you pay $0.05 and then get E[Y] = $1.25 back (in carbonbucks). Sounds like a great deal vs. 4% loss (and a fast way to pay off carbon debt). How does this compare to the lifecycle net efficiency of other methods of carbon capture/abatement, e.g. wind turbines, nuclear solar panels/farms, EVs, afforestation? Any references for such estimates?