This has led to CLC being proposed as an energy efficient carbon capture technology,[9][10] able to capture nearly all of the CO2, for example, from a Coal Direct Chemical Looping (CDCL) plant.[11][12] A continuous 200-hour demonstration results of a 25 kWth CDCL sub-pilot unit indicated nearly 100% coal conversion to CO2 with no carbon carryover to the air reactor.[13][14]