Dear All, MEA is not something you would want released freely in the atmosphere in large quantities, it is toxic. The whole point of using it in carbon capture is the fact that you regenerate it with heat and you continue capturing CO2 with minimal loss. This method would react the MEA with CO2 effectively irreversibly. This would be both VERY expensive (you would need more than one tonne of MEA for each tonne of CO2 captured) and you need energy to produce MEA which would most likely lead to more emissions than what was being captured.
Some common sense would help. Stefano > On 28 Oct 2014, at 01:12, Ronal W. Larson <[email protected]> wrote: > > Andrew, Professor Beget, and List: > > I can’t answer either of Andrew’s questions - but the idea seems to be > novel - and should be quite cheap to test many places. > > Prof. Beget: The Antarctic environment would be needed to understand > the moisture/lifetime issues, but a small test on the right altitudes for > creating a “snow”, the rate of fall, etc should be relatively easy with a > small plane in Alaska. Have you done any testing yet? > > Ron > > >> On Oct 27, 2014, at 6:19 PM, Andrew Lockley <[email protected]> wrote: >> >> Poster's note : maybe I'm missing something, but this seems neither safe nor >> practical to me >> >> https://agu.confex.com/agu/fm14/preliminaryview.cgi/Paper28515.html >> >> 2014 AGU Fall Meeting >> December 15 - 19, 2014 >> >> Menu >> >> Antarctic Pumpdown---a New Geoengineering Concept for Capturing and Storing >> Atmospheric Carbon Dioxide >> >> James E Beget, University of Alaska Fairbanks, Fairbanks, AK, United States >> >> Abstract: >> >> Growing concentrations of carbon dioxide in the atmosphere are increasing >> global temperatures. This is projected to impact human society in negative >> ways. Multiple geoengineering approaches have been suggested that might >> counteract problems created by greenhouse warming, but geoengineering itself >> can be problematic as some proposed methods would pose environmental risks >> to the oceans, atmosphere, and biosphere. I propose a new approach that >> would remove CO2 from the atmosphere and store it in the cryosphere. Carbon >> dioxide would be captured by seeding the atmosphere over a designated small >> region of central Antarctica with monoethanolamine (MEA), a well known >> compound commonly used for CO2capture in submarines and industrial >> processes. Monoethanolamine captures and retains carbon dioxide until it >> encounters water. Because MEA crystals are stable when dry, they would fall >> from the atmosphere just in the local area where the seeding is done, and >> they would be naturally buried by snowfalls and preserved in the upper parts >> of the East Antarctic Ice Sheet, where thawing does not occur. The carbon >> dioxide removed from the atmosphere by this process could reside safely in >> this geologic reservoir for thousands of years, based on known flow >> characteristic of the ice sheet. Also, carbon dioxide stored in this way >> could be recovered in the future by drilling into the ice sheet to the >> frozen storage zone. The CO2 Antarctic Pumpdown (CAP) concept could >> potentially be used to stabilize or reduce the amount of carbon dioxide in >> the atmosphere, and then to store the carbon dioxide safely and >> inexpensively in a stable geologic reservoir >> >> -- >> 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. >> For more options, visit https://groups.google.com/d/optout. > > -- > 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. > For more options, visit https://groups.google.com/d/optout.
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