There is strong evidence that the rising atmospheric CO2-concentration due to burning of fossil fuels is one of the main causes for the global climate change. Therefore CO2-emissions have to be reduced. Beside efficiency improvement and expanding the use of renewable sources also CCS has to be considered. CCS stands for "Carbon Capture and Storage". This collective term includes technologies to separate and store carbon dioxide produced in power plants. The present work describes the construction and the start up of a pilot plant according to the post combustion method. Post-combustion is the capture – in this case by absorption - of CO2 after burning the fuel. The pilot plant mainly consists of a pre-scrubber for desulphurisation and the two columns for absorption and desorption. With this pilot plant it is possible to test new solvents for the CO2-absorption under real conditions directly in a power station. For this purpose the whole arrangement was mounted on a transportable frame and put into operation at the coal-fired power station in Dürnrohr.