A shock tube investigation of the rate of soot formation for benzene, toluene, and toluene/n-heptane mixtures

✍ Scribed by B. Simmons; A. Williams

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 659 KB
• Volume: 71
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(88)90060-0

✦ Synopsis

The rate of soot formation during the pyrolysis and oxidation of rich mixtures of toluene and benzene, and the pyrolysis of toluene/n-heptane mixtures has been determined using a reflected shock technique over the temperature range of 1500-1950K and for pressures between 2.6 and 3.6 x 105 Pa. A laser beam attenuation technique was used to determine soot concentrations using helium-neon lasers at 632.8 and 1152.0 nm. The test gas mixtures were diluted with at least 98 mol% argon and for the pyrolysis experiments the hydrocarbon concentrations did not exceed 0.35 tool m-3. The oxidation experiments employed fuel rich mixtures with equivalence ratios between 6 and 11. Rates of soot formation and soot yields exhibited an Arrhenius dependence and could be expressed by a correlation equation in a form which is also suitable for the prediction of soot limits.