Modeling of coal-gasification fluidized-bed reactors for scale-up and commercial design. Final report, May 1, 1975-December 31, 1978

Following literature review, one-dimensional models considering the bubble, cloud, wake, and the emulsion or dense-phase characteristics were developed. Coal-devolatilization and char-gasification chemistry heat effects and, ultimately, particle-characteristic variations were incorporated into the model. The models were synthesized employing published correlations to estimate fluidization parameters and chemical kinetic expressions derived totally from related A.G.A./GRI projects. The single-stage models are applicable to any fluidized-bed gasifier operating under adiabatic or nonadiabatic conditions and with or without oxygen addition. The application of the single-stage models to several fluidized-bed reaction stages is illustrated by properly coupling the model to simulate the HYGAS process.