Oil and Gas

Biography

Biography: Hoda.S.Ahmed

Abstract

With increased time of usage, lubricating oil loses its lubrication properties and thus must be evacuated and a fresh one replaced. Recovery of waste oil is environment friendly and economic. The waste lube oil was treated by N-methyl-2-pyrrolidone (NMP) + 1% KOH at different conditions as temperatures from 50 to 70 0C and solvent feed ratio from 1/1 to 7/1. The best conditions which produce good quality raffinate with high yield at 70 0C and solvent feed ratio 5/1. The fresh catalyst NiMoAl2O3 that consist of NiO =5.2 wt.% , MoO3=23 wt.%, Al2O3 balance was applied for re-refining of the best raffinate at different reaction temperature range from 320 to 4100C, hydrogen pressure range from 30 to 50 bars and liquid hour space velocity (LHSV) range from 0.3 to 0.7 h-1. The best conditions of hydrotreating to produce the high quality lube oil are (temperature = 350 0C, pressure = 50 bar and LHSV = 0.5 h-1). The catalytic testes carried out using both spent and rejuvenated catalyst (using 4 % oxalic + Fe(NO3)3 at continuous modes) under the constant temperature, hydrogen pressure and liquid hour space velocity (350 0C, 50 bar, 0.5 h-1) respectively, in order to compare the hydrodesulfrization (HDS) activity of fresh, rejuvenate and spent catalyst. The result indicated that oxalic acid treatment are improved the equilibrium HDS activity of the catalyst (nearly close to the equilibrium of fresh) , and also improved the quality of waste lube oil.