Because both of these approaches need totally new plant, they have received less attention than post-combustion capture technologies such as amines, which can be fitted onto the end of existing power stations.

BBC: Whatever happened to carbon capture?

Last week the Department of Energy announced the startup of the Post-Combustion Carbon Capture Center (PC4) in Gaston, Alabama.

FORBES: Still Chasing Clean Coal, US Opens Carbon Capture Lab

At Peterhead, Shell and SSE plan to retrofit part of the existing gas power station to capture CO2 emissions after combustion.

BBC: Grangemouth and Peterhead make carbon capture shortlist