Evaluation of combustion and cleanup of SRC-II coal-derived liquid fuel

Technical Report · Fri Oct 01 04:00:00 EDT 1982

OSTI ID:6650045

Weller, S W; Kennedy, L A; Shaw, D T

Three different sets of experimentas of SRC-II heavy distillate coal-derived liquid fuel were carried out. First, the aging behavior of an SRC-II heavy distillate coal-derived liquid fuel was studied. It was found that initial O/sub 2/ absorption rates vary according to mixing rate, O/sub 2/ pressure, and temperature. Aging at 50/sup 0/ also produces steady increases in viscosity, which may cause handling, pumping and storage difficulties. Another series of experiments was carried out at atmospheric pressure to clarify the influence of fuel properties and combustor parameters on NO/sub x/ formation. These bench-scale studies indicate the following: (1) Fuel nitrogen content is the primary composition variable affecting fuel NO/sub x/ formation in liquid fuels, with NO/sub x/ emissions increasing as the fuel nitrogen content increases. (2) Staged combustion dramatically reduces both fuel and thermal NO/sub x/ formation, with minimal emissions occurring at a primary zone equivalence ratio between 0.75 and 0.85, depending on combustion conditions. A third set of experiments involved investigation of combustion-generated particulates. It was found that particulates generated by combustion of SRC-II are highly irregular in shape and have a similar physical appearance to those particulates found in diesel engine emissions. Most of these particles have diameters of less than 4 microns, with the peak diameter in the submicron range. Full aging of an SRC-II heavy distillate coal-derived liquid fuel increases its viscosity, which in turn increases combustion smoke emissions. Total particulate emission and mass loading (lbs/10/sup 6/Btu) would not be aggravated by these emissions, nor would the emissions create problems when the SRC-II fuel is used to run a gas turbine. The particles' very large surface area may lead to significant increases in mutagenic activity due to atmospheric aging and photochemical conversion. 20 figures, 4 tables.

• Research Organization: State Univ. of New York, Buffalo (USA)
• OSTI ID: 6650045
• Report Number(s): NYSERDA-82-9; ON: DE83900719
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
AGING
ATMOSPHERIC PRESSURE
BENCH-SCALE EXPERIMENTS
CHALCOGENIDES
COAL LIQUEFACTION
COAL LIQUIDS
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
COMBUSTORS
DATA
EMISSION
EXPERIMENTAL DATA
FLUIDS
INFORMATION
LIQUEFACTION
LIQUIDS
MIXING
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
PRESSURE DEPENDENCE
SHAPE
SIZE
SRC-II PROCESS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
VISCOSITY