Coal burning properties determined from CO[sub 2]profiles

Journal Article · Wed Sep 01 00:00:00 EDT 1993 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(93)90126-N· OSTI ID:6377785

Christofides, N J; Brown, R C ^[1]

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1. Iowa State Univ., Ames, IA (United States). Dept. of Mechanical Engineering

The authors are investigating a method for simultaneous determination of devolatilization and char burnout times based on the analysis of CO[sub 2] emissions from a fluidized bed combustor. The technique is nonintrusive and can be performed under realistic combustion conditions. The method involves batching coal samples in a fluidized bed combustor that is heated with propane gas or other fuel. To validate the technique, control tests were carried out using single-sized coal. Carbon dioxide profiles versus time for the batch tests are analyzed with linear models to obtain characteristic time constants for coal devolatilization and char combustion. The technique gives results that are comparable to times measured by more conventional, visual techniques. The approach does not require special sample preparation, can be performed in actual combustion equipment, and employs standard boiler instrumentation.

• OSTI ID: 6377785
• Journal Information: Combustion and Flame; (United States), Vol. 94:4; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBON DIOXIDE
CHEMICAL REACTION YIELD
CHARS
COMBUSTION
COAL
DEVOLATILIZATION
FLUIDIZED-BED COMBUSTION
COMBUSTION KINETICS
COMBUSTION PROPERTIES
MEASURING METHODS
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
KINETICS
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
THERMOCHEMICAL PROCESSES
YIELDS
014000* - Coal
Lignite
& Peat- Combustion