C{sub 2} formation during high-temperature pyrolysis of fullerene C{sub 60} in shock waves
- Universitaet Duisburg (Germany)
The formation of C{sub 2} during thermal decomposition of fullerene C{sub 60} was studied behind shock waves by time dependent absorption and emission measurements. The experiments were performed in the temperature range 2450 {<=} T {<=} 3450 K at pressure in the range 1.1 {<=} p {<=} 2.0 bar. C{sub 2} concentration profiles were measured with a ring dye laser spectrometer at v = 21393.12 cm{sup -1}. Simultaneously, the time behavior of spectrally resolved light emitted from the shock-heated aerosol was recorded by an intensified CCD camera. A simplified reaction mechanism with both C{sub 2} formation and consumption reactions was proposed, and the experimental results were discussed in terms of kinetic parameters. A rate coefficient of the initial reaction C{sub 60} + Ar {yields} C{sub 2} + C{sub 58} + Ar, k{sub 1} = 2.7 x 10{sup 17} exp(-495 kJ/mol/RT) cm{sup 3} mol{sup -1} s{sup -1}, was determined. Two different models for the further decomposition of fullerene fragments were discussed and compared with computer simulations. 17 refs., 6 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 106772
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 36 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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