Kinetics of supercritical-phase thermal decomposition of C{sub 10}-C{sub 14} normal alkanes and their mixtures
- Pennsylvania State Univ., University Park, PA (United States)
Kinetics of thermal decomposition of C{sub 10}-C{sub 14} n-alkanes and their mixtures was studied under near-critical and supercritical conditions. Supercritical-phase thermal decomposition of n-alkanes can be represented well by an apparent first-order kinetics, even though the decomposition was not a true first-order process. A generalized expression was developed to predict the apparent first-order rate constants for the decomposition of C{sub 8}-C{sub 16} n-alkanes at 425 C. Pressure had a significant effect on the apparent first-order rate constant in the near-critical region. This large pressure effect can be attributed to the significant changes in density and possibly to the changes in the rate constants of elementary reactions with pressure in this region. Individual compounds interacted with each other in the thermal reaction of n-alkane mixtures. The overall first-order rate constants for n-alkane mixtures can be predicted satisfactorily from the rate constants for pure compounds. Long-chain alkanes are the major components in petroleum-derived jet fuels and the significant ones in coal-derived jet fuels.
- Sponsoring Organization:
- USDOE Pittsburgh Energy Technology Center, PA (United States)
- DOE Contract Number:
- FG22-92PC92104
- OSTI ID:
- 458446
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 3 Vol. 36; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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