Abstract
To better understand the reactions leading to PAH and ultimately carbonaceous solids within the context of supercritical fuel pyrolysis, the model fuel toluene was pyrolized in an isothermal silica-lined stainless steel coil reactor at 535°C, 140 sec, and 20-100 atm. The yields of benzene and 27 individual PAH increased exponentially with pressure. For 26 of these 28 products, the experimentally measured yield/pressure data conformed well to a first-order global kinetics model, permitting determination of the pre exponential factor A and the activation volume ΔV*, which appear in the pressure-dependent expression for the kinetic rate constant: k = A exp[(-ΔV*/RT)p]. The PAH yield data also revealed product yield ratios, within certain PAH isomer families, that are peculiar to the high-pressure supercritical pyrolysis environment, suggesting that mechanisms for PAH formation differed significantly from those in atmospheric-pressure gas-phase pyrolysis environments.
Original language | English (US) |
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Pages | 84 |
Number of pages | 1 |
State | Published - 2004 |
Event | 30th International Symposium on Combustion, Abstracts of Symposium Papers - Chicago, IL, United States Duration: Jul 25 2004 → Jul 30 2004 |
Other
Other | 30th International Symposium on Combustion, Abstracts of Symposium Papers |
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Country/Territory | United States |
City | Chicago, IL |
Period | 7/25/04 → 7/30/04 |
All Science Journal Classification (ASJC) codes
- General Engineering