A model of multicomponent droplet evaporation with liquid phase reactions

Technical Report · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/6912806· OSTI ID:6912806

Sezen, Y

Research on the dynamics of fuel droplets is of fundamental interest to energy and combustion science. Petroleum plays a significant role in supply the world energy. Since these fuel oils are usually introduced into the combustor as sprays of droplets, it is reasonable to investigate individual droplets which would intimately influence the bulk spray vaporization characteristics, which in turn determines the combustor performance. As interest grows in the use of heavier, synthetic fuels for combustion processes, researchers must re-examine the fuel droplet vaporization problem, both because lower rates of evaporation may pose design problems, and also may lead to greater emissions of unburned coke from combustors. These processes are of interest in connection with the pyrolysis of softening coals. It is experimentally observed that most softening coals exhibit liquid-like behavior during the pyrolysis process, especially under elevated temperature conditions (i.e., 650K and above). The fluidity and plasticity characteristics of softening coals lead us to consider and analogy between liquid fuel droplet combustion and softening coals at elevated temperatures. The present study discusses of pyrolysis of softening bituminous coal particles, and evaporating, coking, heavy oil droplets. A mathematical model for multicomponent droplet evaporation. With consideration of liquid phase reactions is presented. The model is applicable to coal particles undergoing a pyrolysis process which exhibit liquid-like behavior at elevated temperatures. 96 refs., 71 figs., 7 tabs.

• Research Organization: Brown Univ., Providence, RI (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FG22-85PC80527
• OSTI ID: 6912806
• Report Number(s): DOE/PC/80527-T2; ON: DE90012535
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010409* -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
014000 -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COKE
COMBUSTION
DECOMPOSITION
DROPLETS
ENERGY SOURCES
EVAPORATION
FLUIDS
FOSSIL FUELS
FUELS
GASES
LIQUIDS
MATERIALS
MATHEMATICAL MODELS
OXIDATION
PARTICLES
PETROLEUM
PHASE STUDIES
PHASE TRANSFORMATIONS
PRESSURE EFFECTS
PYROLYSIS
PYROLYSIS PRODUCTS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
YIELDS