The HTW process has been used for the gasification of coal by the German coal company Rheinbraun since 1956. The demonstration plant started operation in 1985. It converts 720 t of coal per day into 900, 000m3 (iN) synthesis
gas. In 1996 Inform added a fuzzy logic supervisory control to enable the process for a power plant application. Figure 8.1 shows a photo of this plant.