Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 36, Pages 10872-10876Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201704027
Keywords
sulfur; heterogeneous catalysis; hydrodesulfurization; isotope tracing; mass spectrometry
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Funding
- Russian Science Foundation [14-23-00094]
- Russian Science Foundation [17-23-00004] Funding Source: Russian Science Foundation
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The novel approach based on S-33 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 S-33-isotope-labeled dihydrogen sulfide, followed by monitoring the fate of the S-33 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.
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