"On 29 September, the XPRIZE Foundation based in Culver City, California, announced a 4½-year competition that will award US$20 million to the research team that can come up with the best way to turn carbon dioxide from a liability into an asset." ---------------
"Most of the calcium carbonate now used in industry, an estimated 15 billion tonnes per year, comes from mining such deposits. But since 2013, Calera has been operating a demonstration facility that produces the material from CO2 and carbide residue: an industrial waste that comes from the production of polyvinyl chloride (PVC). Calera first adds water to the residue to extract calcium hydroxide, then bubbles CO2-rich flue gas from a nearby industrial plant through the solution to obtain pure calcium carbonate, which is turned into fibre cement boards that can be used in construction." ----------------------
"This year, Styring evaluated various scenarios of CO2 utilization3. If 100% of urea, 30% of minerals, 20% of specific chemicals and polymers, 10% of methane and 5% of diesel and aviation fuels were supplied by currently known CO2-utilization methods, he estimates that around 1.34 gigatonnes of CO2 would be consumed per year. This equals around 83% of the IPPC's 2030 global target for emissions reductions through CO2 capture and storage. "These are very conservative estimates," says Styring. "It is likely that the impact will be much greater.""
http://www.nature.com/news/how-to-make-the-most-of-carbon-dioxide-1.18653?WT.ec_id=NEWS-20151029&spMailingID=49893583&spUserID=OTE3NzA2MjU2NgS2&spJobID=784093247&spReportId=Nzg0MDkzMjQ3S0
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