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Michigan Tech Students Build a CO2 Scrubber
March 2nd, 2011 Michigan Technological University none Comments

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According to source, Komar Kawatra couldn’t be prouder of the students on his research team. “We have developed a CO2 scrubber,” he says. “It was designed at Michigan Tech and built at Michigan Tech by Michigan Tech students.”

Kawatra, who chairs the chemical engineering department, has reason to be gratified by his proteges’ efforts. An 11-foot bench-model smokestack packed with glass beads is percolating away in a lab. Near the top, a proprietary liquid dribbles down. From below, carbon dioxide bubbles up. By the time the gas reaches the top, fully half of the CO2 has been gobbled up by the liquid.

The process not only captures carbon, it binds it in a solid form, making an undisclosed product that can be used as a construction material. The liquid itself can be recovered and used again. The group has applied for a patent and hopes to build a pilot plant in cooperation with an industry partner, Carbontec Energy Corp.

Other scrubbers remove up to 90 percent of the carbon dioxide from a smokestack, Kawatra notes, but the liquid must be processed to strip away the carbon dioxide, which is generally compressed and stored. “This is a very expensive technique, which is probably why we do not see it commonly employed in industry,” says PhD student Brett Spigarelli of Iron Mountain, a member of the research team.

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