Coal-fired power plants provide nearly 50% of all electricity in the U.S. While coal is a cheap and abundant natural resource, its continued use contributes to rising carbon dioxide (CO2) levels in the atmosphere. Capturing and storing this CO2 would reduce atmospheric greenhouse gas levels while allowing power plants to continue using inexpensive coal. Carbon capture and storage represents a significant cost to power plants that must retrofit their existing facilities to accommodate new technologies. Reducing these costs is the primary objective of the IMPACCT program.
Project Innovation + Advantages:
Researchers at Alliant Techsystems (ATK) and ACENT Laboratories are developing a device that relies on aerospace wind-tunnel technologies to turn CO2 into a condensed solid for collection and capture. ATK's design incorporates a special nozzle that converges and diverges to expand flue gas, thereby cooling it off and turning the CO2 into solid particles which are removed from the system by a cyclonic separator. This technology is mechanically simple, contains no moving parts and generates no chemical waste, making it inexpensive to construct and operate, readily scalable, and easily integrated into existing facilities. The increase in the cost to coal-fired power plants associated with introduction of this system would be 50% less than current technologies.
If successful, ATK's technology would collect and remove CO2 at half the cost to coal-fired power plants of current-generation carbon capture and storage technologies.
Enabling continued use of domestic coal for electricity generation will preserve the stability of the electric grid.
Carbon capture technology could prevent more than 800 million tons of CO2 from being emitted into the atmosphere each year.
Enabling cost-effective carbon capture systems could accelerate their adoption at existing power plants.