Abstract
Model equations have been developed f or the simulation of 75 mmch single-stage pressurized fluidized bed coal gasifier with the aid of kinetic studies using a batch type apparatus and the calculated results of these model equations have been exam-ined and compared with the data obtained from the gasifier.
As a result, it has been shown that they agreed with each other within the accuracy of 15%regarding the reaction rate of carbon, the quantity of product gas, and the heating value of product gas and within the accuracy of 20% regarding the composition of product gas and that, thus, this model was useful f or analyzing gasification test data.
Further, a study of gasification data by this model made it clear that 20-40% of the povided steam reacted, the pyrolytic reaction was responsible f or the appearance of almost all methane and 25-40% of hydrogen in the generated gas and that, when the ratio of the steam to the supplied air became0.2-0.25 or below, the shif t reaction became active in the direction to generate more steam by consuming hydrogen.
