The TECO (Tampa electric company) plant could capture virtually all the CO2, but it doesn't because there is no law requiring it to (i.e. no carbon tax)!
http://discovermagazine.com/2006/dec/clean-coal-technology On a steamy, torpid summer morning in Florida, the Polk power plant is performing a small feat of modern alchemy. Every hour it converts 100 tons of the dirtiest fuel on the planet—coal—into 250 million watts of power for about 56,000 homes and businesses around Tampa. The alchemy part? Vernon Shorter, a tall, bluff consultant for the Tampa Electric Company (TECO), points to a looming smokestack. "Look at the top of that stack," he shouts over the cacophony of generators and coal-grinding machines. "That is the main emissions source. You can't see anything. You don't even see a heat plume."
He's right. No smoke mars the lazy blue Florida sky. The Polk plant captures all its fly ash, 98 percent of its sulfur—which causes acid rain—and nearly all its nitrogen oxides, the main component of the brown haze that hangs over many cities. Built to demonstrate the feasibility of a new way to wring economical power from coal without belching assorted toxins into the air, the $600 million plant has been running steadily since 1996. "It makes the lowest-cost electricity on TECO's grid," Shorter says. "It also has very, very low emissions. Particulate matter is almost undetectable."
What is both distressing and remarkable about the Polk plant is that it could do much more. "There's no requirement for mercury capture, but 95 percent of it could be captured very easily," Shorter adds. More important, the plant could also capture nearly all of coal's most elusive and potentially disastrous emissions: carbon dioxide, the main gas that drives global warming.
~~
~~
The technology behind the Polk plant is called an integrated gasification combined cycle—a mouthful usually shortened to IGCC. Unlike conventional coal-fired generators, IGCC plants don't actually burn the coal itself; they convert it into gas and burn the gas. This highly efficient process makes it possible to selectively pull out the resulting emissions, including carbon dioxide, which could then be collected and buried rather than released into the air.