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Can CO2 Be Captured and Sold?: Scientific American

A researcher is about to test a technology that he says could be a breakthrough for curbing greenhouse gas emissions from coal plants, natural gas generators and other industrial facilities.

Canadian professor Guy Mercier's answer to curbing fossil fuel emissions is literally set in stone. With $300,000 in new grant money from Carbon Management Canada, a network of academic centers, he plans to run gas emitted from a Holcim cement plant through pulverized concrete and rock.

If everything goes to plan, the resulting chemical reaction will capture 80 percent of the carbon dioxide from the tested gas stream at a lower cost than other capture methods.

In theory, the cost of capturing CO2 could head to zero, since the resulting magnesium carbonate formed from chemical reactions between cement plant emissions and rock can be sold at a profit to the wastewater and steel-making industries, Mercier said.

"This can be applied anywhere there's a huge amount of CO2 emitted from smokestacks," said Mercier, an environmental technology professor at the Institut National de la Recherche Scientifique, part of the University of Quebec. He is working with researchers from the University of Calgary and the University of Melbourne on the project.



The fact is that what we're experiencing right now is a top-down disaster. -Paul Krugman
by dvx (dvx.clt št gmail dotcom) on Wed Dec 26th, 2012 at 11:50:41 AM EST
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dvx:
is about to test

Nota Bene.

by afew (afew(a in a circle)eurotrib_dot_com) on Fri Dec 28th, 2012 at 08:03:32 AM EST
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In theory, the cost of capturing CO2 could head to zero, since the resulting magnesium carbonate formed from chemical reactions between cement plant emissions and rock can be sold at a profit to the wastewater and steel-making industries, Mercier said.

Industries which will then use the magnesium and reemit the CO2?

Which will be recaptured by the Mercier technology into more magnesium carbonate?

Um... And collect underpants and profit!

I distribute. You re-distribute. He gives your hard-earned money to lazy scroungers. -- JakeS

by Migeru (migeru at eurotrib dot com) on Fri Dec 28th, 2012 at 08:51:18 AM EST
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Indeed.  It's clear with a moment's thought that such a scheme can never break even.  Cement production relies on separating carbonates into oxide+carbon dioxide.   This alone makes the process carbon neutral because eventually the oxides reabsorb the CO2.  But to perform the separation they typically burn fossil fuel producing an excess of CO2.
by njh on Sat Dec 29th, 2012 at 03:01:21 PM EST
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