You burn coal, you generate carbon dioxide. Coal apologists wish to pretend that an IGCC (yes the abbreviation for the word "cycle" is, in fact, a "C".)
Saying that you generate less carbon dioxide is sort of like announcing that a person who beats another person to the point of putting them in a coma is less of a criminal than someone who beats a person to death.
The number of IGCC coal plants in the world is uncomfortably close to zero, as is, the amount of solar energy. One sees the same substitution for "could" for "is" for both strategies, solar and IGCC, offered by the same people, but we should state that the coal case is almost infinitely more dangerous.
The same people say "IGCC" and "sequestration" in the same sentence all the time, trying to pretend that coal can be clean, but the number of billion ton carbon dioxide sequestration plants being planned is
also zero.
http://en.wikipedia.org/wiki/Combined_cycleA few pilot scale IGCC plants have been built - though notably they don't actually run on
coal but on refinery residues - but nobody is actually building these plants for commercial purposes - coal fueled - unless they are planning a "pilot" to
cover for the coal plants they are
really building.
It's all an
imaginary shell game. "Clean coal," is a
lie. It's marketing. It's lipstick on a pig. It's part of the game to play pretend in lieu of actually
doing something. As usual, it is merely wishful thinking and the same wishful thinkers are here day after day after day buying the same
useless crap again and again.