The competitive advantages of gasification systems are determined both in the fuel flexibility and production but also in their very friendly environmental behaviour. Co-gasification of coal and waste can be determined with parallel or direct gasification. Direct gasification constitutes a viable choice for installations bigger than 350 MWel. Parallel gasification, without further treatment of produced gas, is advisable for gasifiers of small or medium size installed in regions where coal-fired power plants operate.
Keywords: gasification, lignite, waste, combined cycle, IGCC