Catalysis in Industry

, Volume 1, Issue 2, pp 102–110 | Cite as

Deactivation of the Pd-Ag-Al2O3 catalyst and Ag-Al2O3 chemisorbent at joint operation in the process of selective acetylene hydrogenation

  • S. P. Egorova
  • A. A. Lamberov
  • L. R. Galimzyanova
  • M. V. Nazarov
  • V. M. Shatilov
  • Kh. Kh. Gil’manov
Catalysis in Chemical and Petrochemical Industry


The deactivation of the commercial Al-Pd catalyst promoted with silver and Ag-containing chemisorbent in selective acetylene hydrogenation in an ethane-ethylene mixture was studied. It was found that carbonaceous deposits are formed on dispersed silver particles of the Pd-Ag-Al2O3 catalyst and on large silver crystallites of the Ag-Al2O3 chemisorbent. The lightest rapidly burning hydrocarbons of composition CH2.5m with a low degree of aromaticity are sorbed on the silver particles or in the nearest neighborhood of them. Slowly burning hydrocarbons of composition CH1.5–1.8m with high a degree of aromaticity are fixed on the alumina support. It was suggested to replace the Pd-Ag-Al2O3 catalyst currently used at the Nizhnekamskneftekhim plant in the process of selective acetylene hydrogenation by a system with a lower content of silver or without it.


Silver Particle Base Site Lewis Acid Site Alumina Support Silver Metal 
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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • S. P. Egorova
    • 1
  • A. A. Lamberov
    • 2
  • L. R. Galimzyanova
    • 2
  • M. V. Nazarov
    • 2
  • V. M. Shatilov
    • 3
  • Kh. Kh. Gil’manov
    • 3
  1. 1.Kazan Sate Technological UniversityKazanTatarstan, Russia
  2. 2.Kazan State University, KazanKazanTatarstan, Russia
  3. 3.Nizhnekamskneftekhim OAOKazanTatarstan, Russia

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