Soot formation during pyrolysis of aromatic hydrocarbons

Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1984

OSTI ID:5062512

Clary, D W

A study combining experimental, empirical modeling, and detailed modeling techniques has been conducted to develop a better understanding of the chemical reactions involved in soot formation during the high-temperature pyrolysis of aromatic and other unsaturated hydrocarbons. The experiments were performed behind reflected shock waves in a conventional shock-tube with soot formation monitored via attenuation of a laser beam at 633 nm. Soot-formation measurements were conducted with toluene-argon and benzene-argon mixtures. Detailed kinetic models of soot formation were developed for pyrolyzing acetylene, butadiene, ethylene and benzene. The computational results indicate the importance of compact, fused polycyclic aromatic hydrocarbons as soot intermediates and the importance of the reactivation of these intermediates by hydrogen atoms to form aromatic radicals. The overshoot by hydrogen atoms of their equilibrium concentration provides a driving kinetic force for soot formation. The results with ethylene and butadiene indicate that acetylene is an important growth species for soot formation for these fuels. The benzene model suggests that reactions between aromatic species may be important for soot formation from aromatic fuels.

• Research Organization: Louisiana State Univ., Baton Rouge (USA)
• OSTI ID: 5062512
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
010500 -- Coal
Lignite
& Peat-- Products & By-Products
ACETYLENE
ALKENES
ALKYNES
AROMATICS
BENZENE
BUTADIENE
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DIENES
ETHYLENE
HYDROCARBONS
KINETICS
MATHEMATICAL MODELS
ORGANIC COMPOUNDS
POLYENES
PYROLYSIS
REACTION INTERMEDIATES
REACTION KINETICS
SOOT
SYNTHESIS
THERMOCHEMICAL PROCESSES