A Six-Lump Kinetic Model for Olefin Hydrogenation, Hydroisomerization and Aromatization in FCC Gasoline Hydro-Upgrading

Abstract

A six-lump kinetic model was developed to predict the yields of the target products i-paraffin and aromatics in the FCC gasoline hydro-upgrading process aiming at olefin reduction and octane preservation. The experimental data obtained in a fixed bed reactor were used to estimate the eight kinetic constants and the corresponding activation energies in the model using the Marquardt algorithm. The model testing results revealed that the model predictions were in good agreement with the experimental results, indicating the excellent reliability of the model. Furthermore, the model could be extended to different feedstocks and wide operating conditions. The optimal operating conditions for producing Euro IV clean gasoline with the desired olefin and aromatics contents were determined on the basis of the predicted product yields and verified by the experimental results.

A process for producing ultraclean gasoline by coupling efficient hydrodesulfurization and directional olefin conversion

“…The obvious decrease in the OC results from the fact that the increasing H 2 /oil ratio reduces the residence time of olefins over the catalysts and, thus, lowers their conversion, as evidenced by the decreased iso‐paraffin and aromatics increments in Figure b. It is known that a low H 2 /oil volumetric ratio can lead to the deactivation of the catalyst in the second reactor due to the prolonged residence time of olefins and the weakened inhibition effect of hydrogen on coking, so the high H 2 /oil ratio seems to be advantageous. However, the high H 2 /oil ratio causes the high process cost and the low olefin reduction as above mentioned, so a suitable H 2 /oil volumetric ratio should be at around 300.…”

Simulation-assisted design of a catalytic hydrogenation reactor for plastic pyrolysis fuels

“…Kinetic data for the olefin hydrogenation reaction used in the model were adapted from the kinetic model obtained by Fan et al [53]. These authors used a bifunctional catalyst based on Ni-Mo typical of hydrogenation processes [48,54].…”

“…Typical hydrotreatment process conditions [53,57] were fixed initially to obtain overall results of the reactor performance, and to establish a basis for the sensitivity analysis. The conditions of the baseline scenario are summarized in Table 4.…”