Re: in 1492 Columbus discovered...
That sucking sound? CO2 pulled out of air
New York | November 29, 2007 12:01:13 AM IST
Emerging technologies could take direct aim at global warming by sucking carbon dioxide from the air, U.S. scientists said.
Columbia University environmental engineer Frank Zeman is developing a technology that forces air through a chamber where lye -- sodium hydroxide, chemically -- absorbs carbon dioxide, LiveScience reported. The carbon-filled fluid is mixed with lime to form limestone, which is baked to release pure carbon dioxide gas that's ready for storage.
Per year, humans generate roughly 27 billion metric tons of carbon dioxide, which traps heat from the sun. To address concerns regarding global warming, inventors developed carbon dioxide scrubbers that absorb the gas from power plant exhausts, which account for half of all carbon dioxide emissions.
The technology to do this is going through major advances, moving toward detailed designs, Zeman said. It's becoming more and more efficient -- we've cut the electricity requirements by well over half by utilizing the natural suck emitting from the Bengals.
Scientists elsewhere are exploring how to capture the remaining carbon dioxide, LiveScience said. Possibilities include using solar heat and Sundays at Paul Brown Stadium among other methods of air capture.