Combustion and gasification characteristics of chars from four commercially significant coals of different rank. Final report

Technical Report · Wed Sep 01 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/6787316· OSTI ID:6787316

Nsakala, N Y; Patel, R L; Lao, T C

The combustion and gasification kinetics of four size graded coal chars were investigated experimentally in Combustion Engineering's Drop Tube Furnace System (DTFS). The chars were prepared in the DTFS from commercially significant coals representing a wide range of rank; these included a Pittsburgh No. 8 Seam hvAb coal, an Illinois No. 6 Seam hvCb coal, a Wyoming Sub C, and a Texas Lignite A. Additionally, a number of standard ASTM and special bench scale tests were performed on the coals and chars to characterize their physicochemical properties. Results showed that the lower rank coal chars were more reactive than the higher rank coal chars and that combustion reactions of chars were much faster than the corresponding gasification reactions. Fuel properties, temperature, and reactant gas partial pressure had a significant influence on both combustion and gasification, and particle size had a mild but discernible influence on gasification. Fuel reactivities were closely related to pore structure. Computer simulation of the combustion and gasification performances of the subject samples in the DTFS supported the experimental findings.

• Research Organization: Combustion Engineering, Inc., Windsor, CT (USA). Kreisinger Development Lab.
• OSTI ID: 6787316
• Report Number(s): EPRI-AP-2601; ON: DE83900574
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
COMPARATIVE EVALUATIONS
BENCH-SCALE EXPERIMENTS
CE ENTRAINED FUEL PROCESS
COAL GASIFICATION
COAL RANK
EXPERIMENTAL DATA
FOURIER TRANSFORMATION
INFRARED SPECTRA
MICROSTRUCTURE
PARTIAL PRESSURE
PARTICLE SIZE
POROSITY
PROCESS DEVELOPMENT UNITS
PYROLYSIS
SIMULATION
TEMPERATURE DEPENDENCE
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASIFICATION
INFORMATION
INTEGRAL TRANSFORMATIONS
KINETICS
MATERIALS
NUMERICAL DATA
REACTION KINETICS
SIZE
SPECTRA
THERMOCHEMICAL PROCESSES
TRANSFORMATIONS
010404* - Coal
Lignite
& Peat- Gasification
014000 - Coal
Lignite
& Peat- Combustion