High-temperature pyrolysis of toluene
| Autor: | M. R. Patel, H. C. Wei, J. H. Kiefer, K. M. Pamidimukkala, R. D. Kern |
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| Rok vydání: | 1987 |
| Předmět: | |
| Zdroj: | The Journal of Physical Chemistry. 91:2148-2154 |
| ISSN: | 1541-5740 0022-3654 |
| DOI: | 10.1021/j100292a034 |
| Popis: | The thermal decomposition of toluene has been investigated by two independent shock tube techniques: time-of-flight (TOF) mass spectrometry and laser-schlieren densitometry. These studies cover the temperature range 1550-2200 K for pressures 0.2-0.5 atm. C/sub 2/H/sub 2/, C/sub 4/H/sub 2/, CH/sub 4/, and C/sub 7/H/sub 7/ were identified as major species along with lesser amounts of C/sub 2/H/sub 4/, C/sub 6/H/sub 2/, and C/sub 6/H/sub 6/. The laser-schlieren profiles require a dominance by CC scission to phenyl and methyl with a rate constant log k (s/sup -1/) = 12.95-72.6 (kcal)/2.3RT for 1600-2100 K and 0.5 atm. Such dominance is also required to produce the methane seen in the TOF spectra. A mechanisms is proposed which proposed an excellent description of density gradient and major species concentration profiles over this range. |
| Databáze: | OpenAIRE |
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