COMPARISON OF COAL GASIFICATION IN FLUIDIZED AND SPOUTED BEDS.

In the reported experiments, two sub-bituminous coals, a bituminous coal and a reject coal of 55% ash were gasified with steam and air in a 0. 31-m dia. reactor operated in the fluidized and spouted bed modes. Inert beds of 1. 1 mm dia. Ottawa sand and 2. 1 mm dia. gravel provided stable fluidization and spouting respectively, at superficial velocities in the range 1. 3-1. 6 m/s. Coals of 1. 19-3. 36 mm diameter were fed to the gasifier at rates up to 45 kg/h and a range of air/coal ratios. For a given coal, results in the two systems were basically similar, although differences in gas heating value, gas yield and thermal efficiency were noted for some coals.