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A new semi-dry desulfurization process was tested in this study. The process uses the so-called powder-particle spouted bed (PPSB) as the reactor in which coarse medium particles, usually silica sand of several hundred micrometers in size, are fluidized with hot flue gas. A slurry of fine SO x sorbent, such as slaked lime or other alkaline powder, is continuously supplied into the bed of coarse...
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