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2. What is the autoignition temperature of
a) Petrol 246°C
b) Diesel 210°C"
http://hypertextbook.com/facts/2005/EileenTang.shtml
Also check
http://vitzy.net/forum/Diesel-Burning-Ratio-t1229.html
Do not confuse autoignition with sustained flame temperature, which can vary widely due to a number of contributors. Flame temperature of openly-burned diesel at sea level in an environment of 70°F at 80% humidity can range from 900°C to 1200°C, due to factors such as completion of burn, particle size, etc. A good 'general answer' would be 1200°C, but the technically correct answer is a range, not a specific number.
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