Abstract
A mathematical model has been developed to describe physical and chemical processes occurring in an entrained flow coal hydropyrolysis reactor. The model is one-dimensional and incorporates a detailed multistep reaction kinetic model developed by Johnson for hydropyrolysis supplemented by Suuberg's pyrolysis model for rapid reactions, reactions of hydropyrolysis products in the gas phase, hydrodynamics of the gas-solid system, swelling/shrinking of the coal particles, and the heat transfer between the coal-char particles, gases, and reactor walls. A set of 53 simultaneous nonlinear stiff differential equations describing the system was solved using Gear's method. The reactor model has been used successfully in simulating Cities Service Research and Development Company's bench-scale entrained flow coal hydropyrolysis reactors.
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