The world has a carbon dioxide problem. And while there are lots of ideas on how to curtail the nearly 40 billion tons of the gas that humanity spews into the atmosphere annually, one has just gotten a boost: burying it. Since 2012, Reykjavík Energy’s CarbFix project in Iceland has been injecting carbon dioxide underground in a way that converts it into rock so that it can’t escape. This kind of carbon sequestration has been tried before, but as researchers working on the project report today in the journal Science, the process of mineralizing the carbon dioxide happens far more quickly than expected, confirming previous reports and brightening the prospects for scaling up this technology.Iceland’s volcanic landscape is replete with basalt. Injecting carbon dioxide and water deep underground allows the mixture to react with calcium, magnesium, and iron in the basalt, turning it into carbonate minerals like limestone. Conventional methods for storing carbon dioxide underground pressurize and heat it to form a supercritical fluid, giving it the properties of both a liquid and a gas. While making the carbon dioxide easier to inject into the ground—usually in an old oil or gas reservoir—this carries a higher risk that it could… Read full this story
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A Power Plant in Iceland Deals with Carbon Dioxide by Turning It into Rock have 296 words, post on www.technologyreview.com at June 9, 2016. This is cached page on Goose Art. If you want remove this page, please contact us.