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Journal of Materials Science

, Volume 42, Issue 10, pp 3321–3325 | Cite as

Effect of preparation technique on the properties of Mo-containing Al-MCM-41

  • Nina Georgieva KostovaEmail author
  • Elka Kraleva
  • Alla A. Spojakina
  • Erika Godocikova
  • Peter Balaz
Size-Dependent Effects

Abstract

The Al-MCM-41 has been used as support to prepare Mo-containing catalysts. The 12- molybdophosphoric heteropoly acid (HPMo) is used as initial compound. The catalysts are synthesized by two different methods: incipient impregnation with aqueous solution of the acid and mechanochemical synthesis. The samples were tested in the reaction of the thiophene hydrodesulfurization after activation with mixture H2 + H2S. The effect of the preparation method of the catalysts on their physicochemical and catalytic properties has been studied. A partial destruction of the loaded compound is observed in mechanochemically treated sample whereas the aggregates are formed from the particles of different size in the impregnated sample. The specific surface area of the sample prepared by mechanical–chemical treatment decreases 2–3 times, while the total pore volume is about four times lower. The HDS activity is higher on the impregnated sample than on the mechanochemically treated one.

Keywords

Total Pore Volume Temperature Program Reduction Heteropoly Acid Mechanochemical Treatment Heteropoly Compound 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Nina Georgieva Kostova
    • 1
    Email author
  • Elka Kraleva
    • 1
  • Alla A. Spojakina
    • 1
  • Erika Godocikova
    • 2
  • Peter Balaz
    • 2
  1. 1.Institute of CatalysisBulgarian Academy of SciencesSofiaBulgaria
  2. 2.Institute of GeotechnicsSlovak Academy of SciencesKosiceSlovakia

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