Formation and oxidation of soot in diffusion flames. Annual report, January 1990-June 1991
In large industrial furnaces and combustors the primary mode of heat transfer is thermal radiation. This limits the use of natural gas as a fuel because only about 10% of the chemical energy is released as thermal radiation. The rest of the energy serves to increase the temperature of the burned gases. This mode of operation has two disadvantages: (1) A major portion of the chemical energy of the fuel, instead of being directly transferred to the job via radiation, must now be appropriately channeled and extracted by convective processes that require heat transfer equipment capable of handling high temperature exhaust gases. (2) Lower flame radiation results in higher flame temperature which increases the production of pollutants such as NOx. The objectives of the study are: (1) To quantify the formation, growth and oxidation rates of soot in counterflow diffusion flames as a function of temperature, strain rates and fuel and oxidizer concentrations of the two streams. (2) To study the effect on the formation and oxidation rates of soot due to dilution by primary products of combustion (CO2 and H2O) and slight premixing of oxygen and other additives to the fuel stream. (3) To develop a model of a radiating laminar flamelet based on the above measurements.
- Research Organization:
- Michigan State Univ., East Lansing, MI (United States). Dept. of Mechanical Engineering
- OSTI ID:
- 5355767
- Report Number(s):
- PB-92-172295/XAB; CNN: GRI-5087-260-1481
- Resource Relation:
- Other Information: See also PB91-130310. Sponsored by Gas Research Inst., Chicago, IL
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
NATURAL GAS
COMBUSTION KINETICS
SOOT
OXIDATION
SYNTHESIS
ACTIVATION ENERGY
ADDITIVES
CARBON DIOXIDE
CHEMICAL REACTION KINETICS
COMBUSTION CHAMBERS
COMBUSTION PRODUCTS
COUNTERFLOW SYSTEMS
DIFFUSION
FLAMES
HEAT TRANSFER
LAMINAR FLOW
MATHEMATICAL MODELS
METHANE
NITROGEN OXIDES
OXIDIZERS
QUANTITY RATIO
TEMPERATURE DEPENDENCE
THERMAL RADIATION
THERMODYNAMICS
WATER VAPOR
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY SOURCES
ENERGY TRANSFER
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
KINETICS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
REACTION KINETICS
VAPORS
034000* - Natural Gas- Combustion
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry