Soot formation in synthetic-fuel droplets

Technical Report · Tue Jun 01 04:00:00 EDT 1982

OSTI ID:5380443

Kramlich, J C; Seeker, W R; Payne, R

The objective of this program was to develop a phenomenological understanding of droplet combustion and associated carbonaceous particulate formation for synthetic fuel oils. The physical processes that can occur to a droplet in a spray flame are schematically represented. The actual path that a droplet takes after it is injected into the hot flame zone has been found to depend not only on the fuel properties but the flame zone environment. Secondary atomization, droplet dispersion and fuel effects are discussed. Soot yield and the physical processes occurring during droplet burning were influenced by fuel parameters. For dispersed conditions, the yield of soot was found to increase markedly with the fuel C/H ratio whether the gas-phase environment was lean or rich. In addition, to the secondary atomization that occurred with some fuel blends, the droplet termination mechanism was also strongly influenced by fuel effects. All synfuels exhibited terminal micro-explosion while the high-asphaltene content residual fuel-oil was terminated by cenosphere production. High-asphaltene content appears to favor the production of cenospheres as exemplified in this study by the Indonesian/Malaysian fuel oil. However, a very high-asphaltene content blend, SRC-II middle/donor solvent, was found to have violent disruptive termination. The mechanism of micro-explosions is still unclear, but may be similar to that of secondary atomization with the additional complexity of liquid-phase coking reactions.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• DOE Contract Number: AC22-80PC30298
• OSTI ID: 5380443
• Report Number(s): DOE/PC/30298-T7; ON: DE82018420
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
02 PETROLEUM
025000 -- Petroleum-- Combustion
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ATOMIZATION
CHEMICAL REACTION YIELD
COAL LIQUEFACTION
COAL LIQUIDS
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
COMPARATIVE EVALUATIONS
DATA
DROPLETS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
INFORMATION
LIQUEFACTION
LIQUIDS
NUMERICAL DATA
PARTICLES
PARTICULATES
PETROLEUM
RESEARCH PROGRAMS
SOOT
SRC-II PROCESS
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES
VERY HIGH TEMPERATURE
YIELDS