Thanks, Andrew, for the plug for this 2011 paper on an idea for point source CO2 mitigation. Still standing by for the big R&D bucks to roll in.
In the meantime, for more recent news relevant to air capture check out: https://www.llnl.gov/news/newsreleases/2013/May/NR-13-05-07.html http://phys.org/news/2013-05-scientists-co2-sequestration-technique-supergreen.html I'll have more to say about this once the paper is published. -Greg ________________________________ From: [email protected] [[email protected]] on behalf of Andrew Lockley [[email protected]] Sent: Wednesday, May 29, 2013 1:12 AM To: geoengineering Subject: [geo] CO2 Mitigation via Capture and Chemical Conversion in Seawater - Environmental Science & Technology (ACS Publications) http://pubs.acs.org/doi/abs/10.1021/es102671x CO2 Mitigation via Capture and Chemical Conversion in Seawater - Environmental Science & Technology (ACS Publications) Greg H. Rau Environ. Sci. Technol., 2011, 45 (3), pp 1088–1092DOI: 10.1021/es102671x Publication Date (Web): December 28, 2010 Abstract A lab-scale seawater/mineral carbonate gas scrubber was found to remove up to 97% of CO2 in a simulated flue gas stream at ambient temperature and pressure, with a large fraction of this carbon ultimately converted to dissolved calcium bicarbonate. After full equilibration with air, up to 85% of the captured carbon was retained in solution, that is, it did not degas or precipitate. Thus, above-ground CO2 hydration and mineral carbonate scrubbing may provide a relatively simple point-source CO2 capture and storage scheme at coastal locations. Such low-tech CO2 mitigation could be especially relevant for retrofitting to existing power plants and for deployment in the developing world, the primary source of future CO2 emissions. Addition of the resulting alkaline solution to the ocean may benefit marine ecosystems that are currently threatened by acidification, while also allowing the utilization of the vast potential of the sea to safely sequester anthropogenic carbon. This approach in essence hastens Nature’s own very effective but slow CO2 mitigation process; carbonate mineral weathering is a major consumer of excess atmospheric CO2 and ocean acidity on geologic times scales. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering?hl=en. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
