The carbonate looping process is an efficient technology for post-combustion CO2 capture from fossil-fired power plants. Testing campaigns with continuous CO2 capture were performed in a 1-MWth carbonate looping pilot plant at the Technische Universitat Darmstadt. During two distinguished experimental campaigns the heat for the regeneration of the calcium-based sorbent in the calciner was provided by propane combustion and combustion of pulverized hard coal, respectively. For several hours of operation, the CO2 concentration in the flue gas was reduced to chemical equilibrium conditions. High overall CO2 capture efficiencies above 90% were achieved.