Combustion and emission characteristics of coal-derived liquid fuels

Technical Report · Mon Jun 01 04:00:00 EDT 1981

OSTI ID:6528609

Muzio, L J; Arand, J K

A number of coal liquefaction processes have reached a state of development where limited quantities of the fuels are becoming available for testing. An experimental study was conducted to determine their combustion and emission characteristics. In particular, the tests sought to determine (1) the effect of compositional changes on the combustion and emission characteristics and (2) the relative combustion characteristics of the fuels produced from the various processes. The experimental facility was an 80-HP boiler modified to simulate large utility boilers. The following combustion parameters were investigated: excess air level, combustion air preheat, single stage and two stage combustion, fuel viscosity, and atomization. The performance of the coal liquids was compared to No. 2 and No. 6 oils. The coal liquids tested - SRC-II, H-Coal, and EDS distillates - can be handled and atomized similarly to No. 2 petroleum oils. The exception is the combustion of the heavy (550 to 850/sup 0/F) boiling-range component of the SRC-II product which had a higher viscosity, which necessitated either preheating for proper atomization or a change in atomizer. NO emissions from the SRC-II fuels were higher than from the No. 2 and No. 6 fuel oils due to the higher fuel nitrogen content. However, NO emissions could be reduced by lowering the excess air or implementing two-stage combustion. Particulate emissions were generally comparable to the particulate loading from No. 6 oil, with the exception of the heavy boiling-range SRC-II component which had a higher ash content. NO emissions from the H-Coal fuel and the Exxon Donor Solvent fuel were lower than from the SRC-II fuels, consistent with their lower fuel nitrogen contents.

• Research Organization: KVB, Inc., Irvine, CA (USA)
• OSTI ID: 6528609
• Report Number(s): EPRI-AP-1878
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BOILER FUELS
CALORIFIC VALUE
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
COMBUSTION
COMBUSTION PROPERTIES
COMPARATIVE EVALUATIONS
DATA
DISTILLATION
ELEMENTS
EXPERIMENTAL DATA
EXXON LIQUEFACTION PROCESS
FLUIDS
FUEL OILS
FUEL SUBSTITUTION
FUEL-AIR RATIO
FUELS
H-COAL PROCESS
INFORMATION
LIQUEFACTION
LIQUID FUELS
LIQUIDS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PERFORMANCE TESTING
PETROLEUM PRODUCTS
QUANTITY RATIO
SEPARATION PROCESSES
SRC PROCESS
SRC-II PROCESS
TESTING
THERMOCHEMICAL PROCESSES
YIELDS