Correlations between Octane Numbers and Catalytic Cracking Naphtha Composition

This work describes the development of correlations between the research and motor octane numbers (RON and MON, respectively) and the composition of catalytic cracking naphtha. The correlations were developed using a nonideal model. The adjustable parameters in the model were determined by multiple regression using 67 naphtha samples produced at Amuay Fluid Catalytic Cracking Unit. These correlations are useful for predicting catalytic cracking naphtha RON and MON, using its composition determined by gas chromatography. The confidence limits (95%) of these predictions are ±0.6 for RON and ±0.4 for MON. With the information from the octane−composition relationship, it is possible to establish strategies for catalytic cracking naphtha RON and MON enhancement.