Feasibility Assessment on Remanufacturing of Ni–Mo/?–Al2O3 Catalyst for Residue Hydrodesulfurization

Residue hydrodesulfurization (RHDS) is a critical process in the petroleum refining industry for removing sulfur compounds from heavy residual oils. However, catalysts used RHDS can easily be deactivated by numerous factors, leading to reduced efficiency and economic benefits. The remanufacturing of spent useful strategy extending lifespan catalysts, reducing waste, improving sustainability. This paper proposes an effective catalyst commercial catalysts. In detail, sequential unit processes including oil washing (OW), complete incineration (CI), acid leaching (AL) were conducted remanufacture We also highlight some key challenges such as factors involved deactivation. Finally, we provide future perspectives on development RHDS, with goal efficiency, sustainability, competitiveness industry.