Sulfur‐33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement

Abstract

The novel approach based on 33S isotope tracing is proposed for the elucidation of hydrodesulfurization (HDS) mechanisms and characterization of molybdenum sulfide catalysts. The technique involves sulfidation of the catalyst with 33S‐isotope‐labeled dihydrogen sulfide, followed by monitoring the fate of the 33S isotope in the course of the hydrodesulfurization reaction by online mass spectrometry and characterization of the catalyst after the reaction by temperature‐programmed oxidation with mass spectrometry (TPO‐MS). The results point to different pathways of thiophene transformation over Co or Ni‐promoted and unpromoted molybdenum sulfide catalysts, provide information on the role of promoter and give a key for the design of new efficient HDS catalysts.

Synthesis and Characterization of New nano catalyst Mo-Ni /TiO2- γAl2O3 for Hydrodesulphurization of Iraqi Gas Oil

“…Hydrotreating process using catalysts include different parameters which are identified based on the reaction. In general, any catalyst of hydrotreating usually incorporates active metals, additive, promoter, and support material 6 . γ-Al 2 O 3 is very important among other phases because of its structure which possesses a high surface which gains the focus for many chemical and petrochemical separation processes and catalysis 7 .…”