Four main FCC factors affect octane

Feedstock type, reactor temperature, conversion, and catalyst type are the main factors affecting the research octane number (RON) of fluid catalytic cracked (FCC) gasoline. This is based on data from several refineries. It has also been found that the octane response to variations in these parameters are markedly different for the light and heavy gasoline fractions. Whereas feedstock quality and reactor temperature seem to be the main factors affecting light gasoline, reactor temperature, conversion, and catalyst type all seem to have their stongest impact in the heavy gasoline ranges.