Is the auto-ignition point of high-temperature heavy oil higher than that of light oil? Why?

2007-12-30View Original

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Is the auto-ignition point of high-temperature heavy oil higher than that of light oil? Why?

Reply #22007-12-31

The auto-ignition point of heavy oil is lower than that of light oil. This is because during the combustion process of oil, it goes through the stage of hydrocarbons and oxygen forming peroxides, and the ability of heavier hydrocarbons and oxygen to form peroxides is stronger than that of light hydrocarbons. In fact, you can see this from the difference between gasoline and diesel. First of all, gasoline engines are ignition engines, while diesel engines are compression ignition engines. Second, the diesel cetane number actually indicates the self-ignition ability of the oil.

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