Granular moving bed filters and adsorbers (GM-BF/A) - patent review: 1970-2000

Granular moving bed filters and adsorbers (GM-BF/A) for hot gas cleanup continue to be developed as a key component of current integrated gasification combined cycle and advanced pressurized fluidized bed combustion power generation systems. This paper contains a review of the patent literature on GM-BF/A equipment with sidewalls provided with a number of louvers or screenless granular moving bed systems. Patents granted to GM-BF/A equipment are categorized in groups according to thedesign characteristics. Non-uniform flow of a granular moving bed (filter medium, sorbent) is discussed in detail.