Effect of liquefaction processing conditions on combustion characteristics of solvent-refined coal
One of several direct liquefaction processes currently under advanced stages of development is the Solvent-Refined Coal-I (SRC-I) process. A major SRC-1 product option is a low sulfur, low ash solid (SRC) which could be used as an electric utility boiler fuel much in the same manner that pulverized coal is currently fired in this type of combustion equipment. SRC-I processing has been performed using three variations in the manner in which mineral matter and unconverted coal are separated from the hot coal liquid. These processes are the Pressure Filtration Deashing (PFD), Anti-Solvent Deashing (ASD), and Critical Solvent Deashing (CSD). Since processing conditions may influence the combustion of SRC-I solids produced, an experimental program was carried out at both the bench and pilot plant scale to determine the influence of processing (i.e. solids separation method) and combustion conditions on carbon burnout of these three varieties of SRC solid boiler fuels. Included in this study was an examination of NO/sub x/ emissions (particularly for the CSD SRC and PFD SRC) with the objective of attaining low NO/sub x/ emissions without adversely affecting combustion efficiency. The work was carried out at the laboratory, bench and pilot plant scales employing Thermo-Gravimetric analyses, Drop Tube Furnace testing, and Controlled Mixing History furnace testing, respectively. Reactivity and NO/sub x/ emissions results were compared with those obtained from two coals previously tested and used as reference coals. One of these coals was a high reactivity Wyoming subbituminous coal and the other was a low reactivity Kentucky high volatile bituminous coal. The type of processing scheme used in the SRC-I deashing step was found to have a major impact on the combustion properties of the resultant solid SRC product.
- Research Organization:
- Combustion Engineering, Inc., Windsor, CT (USA). Power Systems Group
- OSTI ID:
- 5327234
- Report Number(s):
- EPRI-AP-2328; ON: DE82903665
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
ASHES
CHEMICAL COMPOSITION
MELTING POINTS
COAL LIQUIDS
DEASHING
SOLVENT-REFINED COAL
CALORIFIC VALUE
COMBUSTION PROPERTIES
PERFORMANCE TESTING
BOILER FUELS
CHEMICAL REACTION KINETICS
COAL LIQUEFACTION
COMPARATIVE EVALUATIONS
EMISSION
EXPERIMENTAL DATA
FLY ASH
NITROGEN OXIDES
PYROLYSIS
RECOMMENDATIONS
SRC PROCESS
TEST FACILITIES
THERMAL GRAVIMETRIC ANALYSIS
AEROSOL WASTES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
FLUIDS
FUELS
GRAVIMETRIC ANALYSIS
INFORMATION
KINETICS
LIQUEFACTION
LIQUIDS
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
RESIDUES
TESTING
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WASTES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
200108 - Fossil-Fueled Power Plants- Fuels- (1980-)