Tech Q&A: Cleaner Coal
Tech Q&A: Cleaner Coal
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Tech Q&A: Cleaner Coal
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The benefits of carbon capture in integrated gasification combined cycle plants is more cost-effective than traditional coal-fired power plants and have successfully proven around the world.

Carbon dioxide (CO2) removal is more cost-effective in integrated gasification combined cycle (IGCC) than in retrofit applications to existing pulverized coal-fired power plants. In IGCC, CO2 is removed from the synthetic gas (syngas) prior to combustion, as opposed to the post-combustion methods for pulverized coal units. Also in IGCC, a water gas shift reactor first converts carbon monoxide in the syngas into CO2, which is then removed in the acid gas recovery section via a physical solvent highly selective to CO2. This leaves a syngas mostly void of carbon. As a result, little CO2 is emitted when the syngas is combusted.

CO2 capture technologies used in IGCC are commercially available and have been successfully proven at gasification facilities around the world. Limited commercial-scale, post-combustion carbon capture experience exists in traditional coal-fired power plants. Compared to a pulverized coal-fired power plant, CO2 at an IGCC facility is captured at a much higher pressure before combustion, resulting in smaller CO2 capture equipment that requires less electricity and costs less.

Currently, there is only one IGCC project under construction in the U.S. — Duke Energy’s 630-MW Edwardsport Station in southern Indiana. Burns & McDonnell is performing the front-end engineering design study for CO2 capture at Edwardsport.

For more information, contact Jim Jurczak, 816-822-3899.

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