Non-LTE thermodynamic properties for combustion processes

Journal Article · Tue Sep 01 04:00:00 EDT 1987 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(87)90124-6· OSTI ID:6005596

Fentress, M L; Eddy, T L

The nonequilibrium thermodynamic properties of a product-gas derived from fluidized combustion of Pittsburgh seam coal is obtained using a multitemperature statistical thermodynamic computer model. Concentrations of 18 species are determined as a function of translational temperature (500 < T < 2500 K), pressure (0.1, 1.0, and 10 atm), and vibrational-to-translational temperature ratios of 0.5, 1, 2, and 5. The rotational and electronic excitation temperatures are assumed equal to the translational temperature. The partition functions and usual thermodynamic properties are also calculated and a nonequilibrium Mollier diagram is presented. The multitemperature model assumes chemical equilibrium and therefore represents a first step in describing nonequilibrium combustion reactions in a semiclassical manner. The model can be applied to reactions via chemical kinetics and/or an extension to a multichemical nonequilibrium model. The results indicate the relative concentration of species usually considered to be pollutants, under the range of conditions examined.

• Research Organization: Mechanical and Nuclear Engineering Dept., Pacific Gas and Electric Co., San Francisco, CA 94106
• OSTI ID: 6005596
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 69:3; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
&amp; Peat-- Properties &amp; Composition
014000 -- Coal
Lignite
&amp; Peat-- Combustion
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION PRODUCTS
COMPUTERIZED SIMULATION
ENERGY SOURCES
ENERGY-LEVEL TRANSITIONS
EQUILIBRIUM
EXCITATION
FLUE GAS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
FUNCTIONS
GASEOUS WASTES
HIGH TEMPERATURE
INSTABILITY
KINETICS
MATERIALS
MATHEMATICAL MODELS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MOLLIER DIAGRAMS
OXIDATION
PARTITION FUNCTIONS
PHYSICAL PROPERTIES
POLLUTANTS
QUANTITY RATIO
REACTION KINETICS
SIMULATION
STATISTICAL MODELS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
VERY HIGH TEMPERATURE
WASTES