Columbus, Ohio-based American Electric Power has begun to capture carbon dioxide at a coal-fired powerplant in New Haven, W. Va., as part of a $100-million, 20-MW validation-size carbon-capture and storage-system project. AEP hopes to begin injecting the gas into a well by Sept. 25. The firm demonstrated the technology on a 1.7-MW unit and has applied for $334 million in federal stimulus money to fund about half the cost of commercial installation. The system uses a chilled ammonia process to capture carbon dioxide and, at commercial scale, will capture 90% of the gas from part of the 1,300-MW plant. The project is set to come on line in 2015.