Combustion characterization of coals for industrial applications. Final technical report, January 1, 1981-May 29, 1985

Technical Report · Fri Mar 01 04:00:00 EST 1985

DOI:https://doi.org/10.2172/5880865· OSTI ID:5880865

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

In-depth fundamental information was obtained from a two-inch inner diameter laminar flow reactor referred to as the Drop Tube Furnace System (DTFS). This information consists of the following: (1) pyrolysis kinetic characteristics of four coals of various rank (Texas lignite, Montana subbituminous, Alabama high volatile bituminous, and Pennsylvania anthracite); and (2) combustion kinetic studies of chars produced from the foregoing parent coals. A number of standard ASTM and special in-house bench scale tests were also performed on the coals and chars prepared therefrom to characterize their physicochemical properties. The pilot scale (500,000 Btu/hr) Controlled Mixing History Furnace (CMHF) was used to determine the effect of staged combustion on NO/sub x/ emissions control from an overall combustion performance of the Alabama high volatile bituminous coal. The quantitative fundamental data developed from this study indicate significant differences in coal/char chemical, physical, and reactivity characteristics, which should be useful to those interested in modeling coal combustion and pyrolysis processes. These results underscore the fact that coal selection is one of the keys governing a successful coal conversion/utilization process. The combustion kinetic information obtained on the high volatile bituminous coal has been used in conjunction with combustion engineering's proprietary mathematical models to predict the combustion performance of this coal in the Controlled Mixing History Furnace. Comparison of the predicted data with the experimental results shows a virtually one-to-one scale-up from the DTFS to the CMHF. These data should provide vital information to designers in the area of carbon burnout and NO/sub x/ reduction for large scale coal utilization applications. 31 refs., 28 figs., 17 tabs.

• Research Organization: Combustion Engineering, Inc., Windsor, CT (USA). Power Systems Group
• DOE Contract Number: AC22-81PC40267
• OSTI ID: 5880865
• Report Number(s): DOE/PC/40267-5; ON: DE85010673
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406 -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
014000* -- Coal
Lignite
& Peat-- Combustion
AIR POLLUTION ABATEMENT
ANTHRACITE
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
DATA
DECOMPOSITION
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
FURNACES
GRAVIMETRIC ANALYSIS
INFORMATION
KINETICS
LIGNITE
MATERIALS
MATHEMATICAL MODELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POLLUTION ABATEMENT
PYROLYSIS
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
RESEARCH PROGRAMS
SIZE
STAGED COMBUSTION
STOICHIOMETRY
SUBBITUMINOUS COAL
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
YIELDS