Basalt dust in soil (enhanced weathering)
A 99-day pot (mesocosm) experiment growing potatoes in alkaline soil with basalt powder: the basalt measurably weathered, but no significant gain in stored inorganic carbon was detected in that time; heavy-metal risk was also assessed.
Built / tested: soil mesocosm trials
As reported in: Vienne, Poblador, Portillo-Estrada et al. (2022). Enhanced Weathering Using Basalt Rock Powder: Carbon Sequestration, Co-benefits and Risks in a Mesocosm Study With Solanum tuberosum. Frontiers in Climate. doi:10.3389/fclim.2022.869456
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Direct air capture process
Keith and colleagues described a plant design and costs for capturing CO2 straight from the air.
Built / tested: direct air capture plant
As reported in: Keith, Holmes, St. Angelo et al. (2018). A Process for Capturing CO2 from the Atmosphere. Joule. doi:10.1016/j.joule.2018.05.006
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CO2 turning to stone inside basalt
High-temperature, high-pressure lab experiments found olivine inside whole basalt converted to carbonate far more than a pure olivine sample did, suggesting tests on pure olivine may underestimate how much CO2 basalt can mineralise.
As reported in: Sissmann, Brunet, Martinez et al. (2014). Enhanced Olivine Carbonation within a Basalt as Compared to Single-Phase Experiments: Reevaluating the Potential of CO
<sub>2</sub>
Mineral Sequestration. Environmental Science & Technology. doi:10.1021/es405508a
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Amine scrubbing
Rochelle reviewed amine scrubbing, the main technology for capturing CO2 from power plants.
As reported in: Rochelle (2009). Amine Scrubbing for CO
<sub>2</sub>
Capture. Science. doi:10.1126/science.1176731
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