Deposit formation in hydrocarbon fuels
A high-pressure fuel coking test apparatus was designed and developed and was used to evaluate thermal decomposition (coking) limits and carbon deposition rates in heated copper tubes for two hydrocarbon fuels, RP-1 and commercial grade propane. Tests were also conducted using JP-7 and chemically-pure propane as being representative of more refined cuts of the baseline fuels. A parametric evaluation of fuel thermal stability was performed at pressures of 136 atm to 340 atm, bulk fuel velocities in the range 6-30 m/s and tube wall temperatures in the range 422-811 K. In addition, the effect of the inside wall material on deposit formation was evaluated in selected tests which were conducted using nickel-plated tubes. The results of the tests indicated that substantial deposit formation occurs with RP-1 fuel at wall temperatures between 600 and 800 K, with peak deposit formation occurring near 700 K. No improvements were obtained when deoxygenated JP-7 fuel was substituted for RP-1. The carbon deposition rates for the propane fuels were generally higher than those obtained for either of the kerosene fuels at any given wall temperature. Finally, plating the inside wall of the tubes with nickel was found to significantly reduce carbon deposition rates for RP-1 fuel.
- Research Organization:
- United Technologies Research Center, East Hartford, CT 06108
- OSTI ID:
- 5763712
- Journal Information:
- J. Eng. Power; (United States), Vol. 105:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
KEROSENE
COKING
THERMAL DEGRADATION
PROPANE
STABILITY
BENCH-SCALE EXPERIMENTS
CARBON
COPPER
DEPOSITION
FLOW RATE
FUELS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCARBONS
INHIBITION
LABORATORY EQUIPMENT
LIMITING VALUES
MATERIALS TESTING
NICKEL
PARAMETRIC ANALYSIS
PRESSURE DEPENDENCE
PROTECTIVE COATINGS
PYROLYSIS
TEMPERATURE DEPENDENCE
THERMAL TESTING
THERMODYNAMIC PROPERTIES
TUBES
ALKANES
CARBONIZATION
CHEMICAL REACTIONS
COATINGS
DECOMPOSITION
ELEMENTS
EQUIPMENT
LIQUID FUELS
METALS
NONDESTRUCTIVE TESTING
NONMETALS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
025000* - Petroleum- Combustion
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry