Modelling of hydrodesulphurisat of reactions on a diesel fraction and its aplication on production unit

Istražen je odnos svojstava sirovine i katalizatora pri katalitičkom uklanjanju sumpora iz srednjih frakcija nafte koje se koriste kao sirovina za sekundarne katalitičke procese. Aktivnost komercijalnih katalizatora Ak, Bk i Ck ispitana je na poluindustrijskom uređaju kod različitih temperatura (300 -360 °C) i volumnih brzina (1–2 m3/m3h). Utvrđeno je da Ak i Ck katalizatori za hidrodesulfurizaciju (HDS) dizelske frakcije mogu povaćati količinu proizvedenog dizelskog goriva sa udjelom manjim od 500 ppm sumpora uz smanjenje tlaka u reaktoru i manju potrošnju vodika. Ispitivanja su pokazala da se katalizatori s povećanom HDS aktivnosti primjenjuju posebno kod sirovina koje sadrže jedan dio krekirane komponente. Važno je naglasiti da se simulacijom procesa za hidrodesulfurizaciju mogu predložiti određene korelacije za predočenje kinetičkog modela i predvidjeti određen red reakcije. S obzirom na postojeće zakonske propise, proces hidrodesulfurizacije postaje glavni činilac, koji doprinosi da dizelska goriva budu što manje štetna sa stajališta zaštite okoline, te pridonosi razvoju bioinžeinjerstva u RH.This paper was focused on research of the relationship between raw material and catalyst at catalytic desulphuriszation of diesel fraction used as feedstock for the secondary catalytic processes. The activity of commercial catalysts Ak, Bk and Ck were tested in the pilot plant at various temperatures (300 – 360 °C) and at the space velocities (1–2 m3/m3h). It was established that Ak and Ck hydrodesulphurisation catalysts for diesel fraction can increase production of diesel fuel with sulphur content less then 500 ppm sulphure, decrease the reactor pressure and lower the consumption of hydrogen. The test also confirmed that catalysts with increased HDS activity can be applied especially for desulphurization feeds which contain part of cracking component. It is important to know that with simulation of the hidrodesulphurisation process we can suggest some correlations for kinetic model and foreseen the range of reaction. Hydrodesulphurization process becomes the main factor which contribute to enviromentally acceptable use of diesel fuels, in the aim of bioengineering development in Croatia