The PRENFLO coal gasification process and experience from the Fürstenhausen demonstration plant in Germany are described. The PRENFLO process, a further development of the Koppers-Totzek process, is based on the entrained-flow principle with dry fuel dust feeding. Experience from the two demonstration plants in Hamburg and Fürstenhausen supplied the main data for the first commercial-size PRENFLO plant for Elcogas, S.A., in Puertollano, Spain. With a net electrical output of 300 MW the Puertollano plant is the world's highest capacity combined-cycle power plant based on coal. In particular, some results from the 1992 test programme in the Fürstenhausen plant are presented.