04-23-2010, 10:00 AM
Here is an extract form a paper I di on this.
I must note however, we did this test in a lab, not in an actual plane, the conditions are similar however:
Date of Test: 22-03-2002
Time: 11:59 CET
Testers: D. Ista, B. Buijs, M. Verhallen
The ignition delay times of kerosene were measured in a preheated shock tube. The test sample composition was determined by directly measuring the kerosene vapor pressure in conjunction with gas chromatography, to account for the adsorption of heavy hydrocarbon fuels on the wall in shock tube experiments. Under conditions for a tailored interface, an experimental observation time of about 6 ms was obtained, consequently the lower temperature bound of experiments was extended to 1000K. The emission of the OH radical at 309nm was observed to identify the time to ignition. Experiments were performed over the pressure range of 1.8-5.0atm, temperature range of 1030-1860K, fuel concentrations of 0.1-0.33% mole fraction, and stoichiometric ratios of Ï=0.25, 0.5, 1.0, and 2.0. The correlation of the kerosene ignition times with temperature and concentrations of kerosene and oxygen has been obtained experimentally.
Conclusion to the Senior:
According to the test, the kerosene is suited for consumption, and there are no hazardous substances detected. Levels of CO and CO2 are within accepted levels laid down by the WHO and the IATA. The wasteproducts might form a healthrisk when exposed to serious concentrated form of the wasteproduct, exceeding 3500 PPM. However, this is unlikely. This can only occur when the engine would be running at full throttle for over 20 days. There are no known issues of this occuring.
Riskfactor:
It is in our opinion that maybe certain chemicals present in the atmosphere at the time of the passing of the plane MIGHT include a certain reaction in conjunction with sunlight. But this field of study is outside that of ours, and shold be in the realm of organic chemistry. At this time, we cannot conclude if there is a possibility of it occuring, further study is required and recommended.
I must note however, we did this test in a lab, not in an actual plane, the conditions are similar however:
Date of Test: 22-03-2002
Time: 11:59 CET
Testers: D. Ista, B. Buijs, M. Verhallen
The ignition delay times of kerosene were measured in a preheated shock tube. The test sample composition was determined by directly measuring the kerosene vapor pressure in conjunction with gas chromatography, to account for the adsorption of heavy hydrocarbon fuels on the wall in shock tube experiments. Under conditions for a tailored interface, an experimental observation time of about 6 ms was obtained, consequently the lower temperature bound of experiments was extended to 1000K. The emission of the OH radical at 309nm was observed to identify the time to ignition. Experiments were performed over the pressure range of 1.8-5.0atm, temperature range of 1030-1860K, fuel concentrations of 0.1-0.33% mole fraction, and stoichiometric ratios of Ï=0.25, 0.5, 1.0, and 2.0. The correlation of the kerosene ignition times with temperature and concentrations of kerosene and oxygen has been obtained experimentally.
Conclusion to the Senior:
According to the test, the kerosene is suited for consumption, and there are no hazardous substances detected. Levels of CO and CO2 are within accepted levels laid down by the WHO and the IATA. The wasteproducts might form a healthrisk when exposed to serious concentrated form of the wasteproduct, exceeding 3500 PPM. However, this is unlikely. This can only occur when the engine would be running at full throttle for over 20 days. There are no known issues of this occuring.
Riskfactor:
It is in our opinion that maybe certain chemicals present in the atmosphere at the time of the passing of the plane MIGHT include a certain reaction in conjunction with sunlight. But this field of study is outside that of ours, and shold be in the realm of organic chemistry. At this time, we cannot conclude if there is a possibility of it occuring, further study is required and recommended.
"The Dutch Guy"