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

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 fa...

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Published inAngewandte Chemie International Edition Vol. 56; no. 36; pp. 10872 - 10876
Main Authors Sushkevich, Vitaly L., Popov, Andrey G., Ivanova, Irina I.
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 28.08.2017
EditionInternational ed. in English
Subjects
Catalysts
heterogeneous catalysis
Hydrodesulfurization
isotope tracing
Mass spectrometry
Mass spectroscopy
Molybdenum
Oxidation
Scientific imaging
Spectroscopy
Sulfide
Sulfides
Sulfur
Temperature effects
mass spectrometry
sulfur
hydrodesulfurization
heterogeneous catalysis
isotope tracing
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Summary: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. Pathways of thiophene transformation: MoS2‐based catalysts: An approach based on 33S isotope tracing is proposed for the elucidation of hydrodesulfurization (HDS) mechanisms and characterization of MoS2 catalysts. The results point to different pathways of thiophene transformation over Co or Ni‐promoted and unpromoted molybdenum sulfide catalysts and provide information on the role of promoter.
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ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201704027