Hydrodesulfurization catalysts are specialized materials that facilitate the HDS process. These catalysts are typically composed of active metals such as molybdenum (Mo) or tungsten (W), supported on a substrate like alumina (Al2O3). Promoters such as cobalt (Co) or nickel (Ni) are often added to enhance catalytic activity. The most common HDS catalyst is a mixture of Co-Mo or Ni-Mo on alumina.
