Technology options for capturing CO2

Concerns about global climate change have prompted interest in reducing or eliminating the carbon dioxide (CO 2 ) emissions of fossil fuel-fired power plants. Here's a guide to the technology and economics of three CO 2 capture methods: postcombustion separation of CO 2 from flue gas (applicable to existing plants), and oxygen-fired combustion and precombustion capture (suitable for new coal-fired capacity, including IGCC plants).