The Adsorption of Nitric-oxide On Supported Co-mo Hydrodesulfurization Catalysts - a Review

Introduction Regulations about maximum sulfur contents of oil fractions and consequent SO, emissions from their combustion are becoming increasingly more stringent. Simultaneously, the oil industry has to deal with oil chargesthat are heavier and have higher concentrations of sulfur-containing compounds, leading to more severe desulfurization conditions. Therefore, catalysts with higher performance in hydrodesulfurization (HDS) are sought in order to cope with these new needs. ∗ Present address: GRECAT—Dep. Eng. Quimica, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, Av. Rovisco Pais, P-1096 Lisboa Codex, Portugal.