Scientific journal
Название журнала на английском
ISSN 2500-0802
ПИ №ФС77-61154

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CO ISOTOPIC EXCHANGE REACTION OVER MNALCA CATALYST

Breeva N.V. 1, 2
1 D. Mendeleyev University of Chemical Technology of Russia
2 Chemway Palladium Co.ltd
In this paper we report our results regarding the isotopic exchange reaction: 12С18О+13С16О↔ 12С16О+13С18О over MnAlCa catalyst between -196 and +5000С. In the -196±250С temperature range, no CO disproportionation/dissociation reactions are observed. For the MnAlCa catalyst, an activation energy of 14,6 kJ mol-1 was estimated for the isotopic mixing reaction within the range -196±250С. It is proposed that the CO isotopic exchange proceeds via no dissociative mechanism in the same range. At higher temperature, reactions of CO disproportionation are observed. An exchange of the 16O from the MnAlCa support with the gas-phase 18O-containing isotopes of CO takes place. Three types of CO adsorbed species on MnAlCa were proposed. .Mass spectrometric, chemisorptions measurements have been employed.