Reactivity of whole coals, selected pure maceral fractions, and cleaned coal products

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:6132031

Crelling, J C ^[1]; Hippo, E J ^[2]

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1. Southern Illinois Univ., Carbondale, IL (USA). Dept. of Geology
2. Southern Illinois Univ., Carbondale, IL (USA). Dept. of Mechanical Engineering and Energy Processes

The overall objective of this project was to determine the chemical reactivity properties of pure single coal maceral fractions in order to predict the combustion behavior of various whole coals of different maceral compositions and rank. The results to data of this study clearly support the following list of important conclusions: Maceral interactions occur during combustion profile tests; Combustion profile temperatures and parameters are rank related but not all coals show the same rank relationships; Pure macerals more clearly define the rank relationships; Vitrinite and liptinite behavior is more predictable than inertinite behavior; Combustion profile temperatures vary as a function of whole coal sample density; Physical cleaning has positive or little effect on combustion profile behavior; If SCE is to be used to prepare combustion feedstocks, then deep physical cleaning is recommended to enhance desulfurization and combustion properties; Combustion profiles can be modeled as apparent first order reactions; Activation energy is independent of rank but not of maceral composition or rank type (i.e. rank band); Combustion curves can be normalized and fitted to a polynomial-log equation; Reactivity studies show that both whole coal and maceral concentrate reactivities decrease with increasing rank; Whole coal reactivities are not a weighted average of the maceral reactivities from that coal; Demineralized whole coals show a greater variation in reactivity than do untreated whole coal samples. 50 refs., 6 figs.

• Research Organization: Southern Illinois Univ., Carbondale, IL (USA). Coal Extraction and Utilization Research Center
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: FC22-89PC89904
• OSTI ID: 6132031
• Report Number(s): DOE/PC/89904-T21; ON: DE91010379
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ACTIVATION ENERGY
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CENTRIFUGATION
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL PREPARATION
COAL RANK
COMBUSTION KINETICS
CORRELATIONS
DEMINERALIZATION
DENSITY
DERIVATIZATION
DESULFURIZATION
DOCUMENT TYPES
ELECTRIC UTILITIES
ENERGY
ENERGY SOURCES
EQUATIONS
EXINITE
FORECASTING
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
INERTINITE
KINETICS
LIGNITE
MACERALS
MATERIALS
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
PREDICTION EQUATIONS
PROGRESS REPORT
PUBLIC UTILITIES
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SAMPLE PREPARATION
SEPARATION PROCESSES
SUBBITUMINOUS COAL
SULFUR CONTENT
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
VITRINITE