Reaction mechanism and kinetic modeling of hydroisomerization and hydroaromatization of fluid catalytic cracking naphtha

CATEGORY: NAPHTHA
Reaction mechanism and kinetic modeling of hydroisomerization and hydroaromatization of fluid catalytic cracking naphtha

Type	Journal Article
Author	Zhiping Chen
Author	Jian Xu
URL	http://www.sciencedirect.com/science/article/pii/S0378382014004093
Volume	130
Pages	117-126
Publication	Fuel Processing Technology
Date	February 2015
Abstract	Presents results of a study of hydroisomerization and hydroaromatization of fluid catalytic cracking (FCC) naphtha and model hydrocarbons over a Ni–Mo/Al2O3–HZSM-5 octane recovery catalyst. Researchers offer a general mechanistic pathway. They present a twenty-two lump kinetic model based on n-paraffin, i-paraffin, olefin, naphthalene, and aromatics (PIONA) analyses. They have designed an octane number prediction model based on the composition of the kinetic lumps. Results revealed that the main reactions occurring are dimerization, cracking, isomerization and aromatization of olefins. Isomerization and aromatization are advantageous for the olefin reduction and octane number preservation of FCC naphtha in hydro-upgrading. The reaction mechanism pathway under industrial conditions mainly includes two stages: olefin interconversion and olefin aromatization, accompanied with olefin saturation. The parameters in the kinetic model and octane prediction model were estimated from experimentaldata. Results revealed the model predictions to be in good agreement with experimental results.