R. Palos, A. Gutierrez, I. Hita, P. Castaño, J.W. Thybaut, J.M. Arandes, J. Bilbao
Industrial & Engineering Chemistry Research, (2019)
The hydrotreating of light cycle oil (LCO) into high quality fuels has been investigated experimentally and kinetically, developing a model that accounts for the main and simultaneous reaction pathways: hydrodesulfurization (HDS), hydrodearomatization (HDA), and hydrocracking (HC). The experiments have been carried out in a fixed bed reactor, NiMo/SiO2-Al2O3 commercial catalyst, 320–400 °C; 80 bar; space time, 0–0.5 gcat h gLCO 1; and, H2/LCO volumetric ratio of 1000 Ncm3 cm-3. The kinetic model proposed contains multiple lumps, species and pathways, leading to the faithful prediction of hydrotreatment products from different viewpoints. The computed kinetic parameters have allowed for simulating the process and seeking the optimal operating conditions. This way, the maximum values obtained for the conversions of HDS, HDA and HC have been of 90 %, 20 % and 65 %, respectively; whereas a good compromise between the different hydrotreating goals have been obtained in the range of 385–400 ºC for a space time of 0.2 gcat h gLCO 1. Finally, obtained optimal operating conditions have been compared with those optimized in the literature.