Study On Deactivation And Regeneration Of A Catalyst During Hydrotreating Processes

A series of gas-oil hydrotreating experiments were carried out under different operating conditions; reaction temperatures of 300, 325, 350, 375, 400 & 425°C, hydrogen pressures of 15, 35, 50 & 65 bar and liquid hourly space velocities of 0.5, 0.75, 1.00,a catalyst under investigation was used and divided to three zones each is separated from another by glass beads/ glass wool. The effect of operating conditions on the hydrodesulfurization (HDS) activity of the catalyst and products quality was studied usThe deactivation of a Co-Mo/ γ – alumina hydrotreating catalyst was investigated in a cata – test micro reactor unit by using heavy vacuum gas oil (HVGO) and a blend of 40: 60 % HVGO and heavy vacuum residue (HVR) as feed stocks at the following fixed opehigh as 3.9 wt. % and 10.2 wt. % in case of HVGO and feed blend, respectively, then tends to level off or reaches an equilibrium value within 24 h.The DROPs in catalyst surface area were particularly high (28.57 % and 41.71 % for HVGO and feed blend, respThe coke removal on using the burn off method was increased with TOS from 3 to 24 h for both HVGO and feed blend, while in case of THF extraction method the coke removal was decreased. The improvement of surface area after regeneration is very important t