Kinetic Model of Heavy Paraffins Dehydrogenation

Abstract

Kinetics of reaction and catalyst deactivation were determined based on the dehydrogenation of C 10 − C 13 heavy paraffins to the corresponding mono-olefins, and Powell method was used to optimize the parameters. Activation energy and pre-exponential factor presented linear relationship with carbon number. The results showed that dehydrogenation became easier with the increase of carbon number of heavy paraffin and the deactivation of catalyst became slower with the increase of LHSV and pressure. The validation of kinetic model showed it was in good accordance with experimental data.

Dehydrogenation kinetic model of heavy paraffins

“…The raw material of these studies are usually a mixture of C 9 ‐C 14 , the different composition of raw material has significant effect on both the catalytic dehydrogenation reaction and the catalyst deactivation. Ren and coworkers established apparent kinetic model and catalyst deactivation model based on the dehydrogenation experiments of heavy paraffins mixture, but only the main reactions (dehydrogenation of paraffins to mono‐olefins with different carbon number) were considered in her model, and the side reactions were not taken into account.…”

Simulation and Optimization of Industrial Reactors for Dehydrogenation of Heavy Paraffins with Different Carbon Numbers

“…For the study of reaction kinetics, it is helpful to have insight into the reaction mechanism and establish the reaction model of the process, which is an important tool for the design and simulation of commercial reactors. 8 Ren et al 9 established an apparent dehydrogenation kinetic model and catalyst deactivation kinetic model of heavy paraffins with different carbon numbers, but the side reactions were not considered. Jiang et al 10 established the intrinsic kinetic model and catalyst deactivation model considering the effect of side reactions with different carbon-number heavy paraffins.…”