Pyrolytic conversion of carbonaceous solids to fuel gas in quartz sand fluidized beds

摘要

Particulate carbonaceous solids are pyrolytically converted to fuel gas in a fluidized bed containing quartz sand as the primary inert heat-transfer medium. In addition to the quartz sand, the fluidized bed contains an anti-agglomerating composition consisting of a carbonate or oxide of calcium, magnesium, or barium, or mixtures thereof. The formation of sand agglomerates (viz. clinkers) interferring with fluidized bed operation is prevented. Coarsely ground limestone is the preferred additive.