Effect of preparation technique on the properties of Mo-containing Al-MCM-41 |
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Authors: | Nina Georgieva Kostova Elka Kraleva Alla A Spojakina Erika Godocikova Peter Balaz |
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Affiliation: | (1) Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(2) Institute of Geotechnics, Slovak Academy of Sciences, 04353 Kosice, Slovakia |
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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. |
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