Mixing and gasification of coal in entrained flow systems. Volume 2. User's manual for a computer program for 1-dimensional coal combustion or gasification (1-DICOG). Final report
A one-dimensional, steady-state model describing pulverized coal combustion and gasification is presented. While emphasis has been placed on the description of the coal reaction processes and gas-particle interactions, one-dimensional fluid mechanics and particle-particle, particle-wall radiation have been included. Moisture vaporization from the coal particles, multi-step coal pyrolysis, and heterogeoneous char oxidation by multiple oxidizers are modeled for polydispersed coal particle sizes or types. Although the formulation is one-dimensional, mixing rates of primary and secondary streams and recirculation within the reactor have been accounted for as specified input. The resulting model predicts thermal, chemical and physical histories for both the gaseous and particle phases. Gas-particle interactions account for appropriate diffusion and kinetic rates. Gas phase reactions are assumed to be in local chemical equilibrium. The solution technique uses predictor-corrector methods for integration of the ordinary non-linear differential equations which are coupled with a number of auxiliary algebraic equations. An iterative approach is required for the radiant heat transfer calculations by the zone method. Stiffness in differential energy equations is overcome by a pseudo steady-state method when needed. The generalized nature of the model allows for calculation of both coal combustion and coal gasification characteristics. This code can be obtained at a minimal cost from: Dr. L. Douglas Smoot, 270 CB, Brigham Young University, Provo, Utah 84602. Included are the User's Manual and the card deck. The cost provides for some assistance by telephone in implementing the code and interpreting the output.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA). Dept. of Chemical Engineering
- OSTI ID:
- 5280878
- Report Number(s):
- FE-2666-F(Vol.2)
- Country of Publication:
- United States
- Language:
- English
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