Effect of Middle Distillates' Properties on their Reactivity in Ultra Low Hydrodesulfurization

摘要

Ultra low hydrodesulfurization of straight run and conversion middle distillates and mixtures thereof was carried out on a high performance commercial Co-Mo catalyst in a trickle bed pilot plant with the aim to develop a correlation that predicts hydroge-nate sulfur from physical and chemical properties of the feedstock. It was found that by using a 1.5 order kinetic model the rate constants correlate with total sulfur, di-benzothiophenes, total nitrogen, total aromatics and poly nuclear aromatics content and the content of the material boiling above 340 °C (according to simulation distillation ASTM D-2887 of the middle distillate). The correlation proved to accurately predict the hydrogenate sulfur in a Lukoil Neftochim Bulgaria (LNB) refinery hydrodesulfurization (HDS) unit. The correlation could be applied for optimization of production of near zero sulfur diesel (NZSD) in a refinery.