04/01/2005 | Siemens integrally geared process-gas radial turbines enhance power supply in processes with off-gas or process gas as byproducts. A medium- to high-temperature gas can be used for direct drive of a compressor or an electric generator, with no need for additional heat exchange or steam generation equipment. The Siemens STC-GT product line is the ideal solution for gas expansion in a number of chemical processes. The photo shows the off-gas process radial turbine for a purified terephthalic acid (PTA) plant in Indorama, Thailand.