Suitability of spent hydrodesulphurisation (HDS) catalyst in low pressure distillate hydrocracking—a case study

Abstract

A BS TRA CT Low pressure hydrocracking (40-80 atm., 425°C and 0.5 liquid hourly space velocity is achieved economically on a low cost spent hydrodesulphurisation catalyst (cobalt-molylalumina) using vacuum distillate of Indian crudes. Once through, conversion to products boiling below 371°C was in the range 40.69-43.04 wt % with the middle distillate amounting to 32.03-38.24 wt %.

Recycling the CoMo/Al2O3 catalyst for effectively hydro-upgrading shale oil with high sulfur content and viscosity

“…In some studies, the spent catalysts were rst decoked before reused and were found to have good activity and selectivity for mild hydrocracking of vacuum distillates to middle distillates. 40,41 A comprehensive review of the recycling of spent HDS catalysts can be referred. 42 The hydrocracking activity was determined by analyzing the simulated distillation results of the liquid products, as shown in Fig.…”