Mixing and kinetic processes in pulverized coal combustors. Volume 2: user's manual for a computer program for 1-dimensional coal combustion or gasification (1-DICOG)
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 heterogeneous 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. User information is presented, along with a sample computation and a listing of the program.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA). Dept. of Chemical Engineering
- OSTI ID:
- 5599133
- Report Number(s):
- EPRI-FP-1199(Vol.2)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
014000* -- Coal
Lignite
& Peat-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPUTER CALCULATIONS
COMPUTER CODES
DATA
DATA FORMS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUID FLOW
FOSSIL FUELS
FUELS
INFORMATION
KINETICS
MATHEMATICAL MODELS
MIXING
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SWIRL FLOW
TABLES
TECHNOLOGY TRANSFER
THERMOCHEMICAL PROCESSES