Study of Catalyst Deactivation in Liquid-Phase Hydrogenation of 3-Nitrostyrene Over Au/Al2O3 Catalyst in Flow Reactor

A. L. Nuzhdin, S. I. Reshetnikov, G. A. Bukhtiyarova, B. L. Moroz, E. Yu Gerasimov, P. A. Pyrjaev, V. I. Bukhtiyarov

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Abstract: For the first time, we report the results of the study of dynamics of the Au/Al2O3 catalyst deactivation during the selective liquid-phase 3-nitrostyrene (3-NS) hydrogenation in a fixed bed flow reactor. It is shown that the formation of carbonaceous deposits is the main reason of catalyst deactivation, while the leaching of gold from the Au/Al2O3 catalyst or enlargement of the gold particles has not been detected. The content of the carbon deposits on the spent catalyst at the inlet of the reactor is higher than at the outlet and increases as the initial concentration of 3-NS grows. The character of carbonaceous deposits allocation and analysis of reaction products point out to 3-vinylnitrosobenzene as the main source of the Au/Al2O3 catalyst deactivation coinciding with the speculation arising from the kinetic modeling. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)572-580
Number of pages9
JournalCatalysis Letters
Volume147
Issue number2
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • 3-Nitrostyrene
  • Au/AlO catalyst
  • Deactivation
  • Flow reactor
  • Heterogeneous catalysis
  • Kinetic modeling
  • Liquid-phase hydrogenation
  • Selective hydrogenation
  • GOLD
  • DESIGN
  • Au/Al2O3 catalyst
  • P-CHLORONITROBENZENE
  • NANOPARTICLES
  • NITROARENES
  • PRESSURE
  • REDUCTION
  • AU
  • CHEMOSELECTIVE HYDROGENATION
  • NITRO

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