During the last decade, there have been significant advances towards the commercialisation of combined cycle systems, such as the integrated gasification combined cycle (IGCC) and pressurised fluidized bed combined cycle (PFBCC). Commercial- and demonstration-scale designs are currently being used for power generation in the United States, Europe, and Japan. An important component in combined cycle power systems is a high temperature, high pressure (HTHP) particulate control device. Efficient hot gas particulate filtration is necessary to protect the downstream heat exchanger and gas turbine components from fouling and erosion to meet emission requirements. A range of technologies has been proposed for hot gas particulate filtration but few have been developed sufficiently to enable commercial exploitation in combined cycle power systems. Mitchell (1997) discusses in detail the developments of these technologies.
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