Conclusions
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1.
Reduced and calcined SNM-1 catalyst adsorbs carbon monoxide in two forms: low-temperature (tmax 100°C) and high-temperature (tmax 550°C). The bonding strengths of these species and their concentration on the surface have been estimated.
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2.
Chemisorption of carbon monoxide is decreased when the catalyst is reduced. It has been found that carbon dioxide is reduced to carbon monoxide by interaction with the surface.
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3.
On the nonreduced catalyst, water is present in two forms. Treatment with carbon monoxide at 250°C, together with reduction, leads to a considerable degree of removal of water from the surface.
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4.
At 150°C, on the SNM-1 catalysts activated adsorption of hydrogen takes place; this is not observed at 20°C.
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Literature cited
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 291–296, February, 1984.
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Khodakov, Y.S., Kotyaev, K.P., Makarov, P.A. et al. Thermal desorption study of surface properties of SNM-1 methanol synthesis catalyst. Russ Chem Bull 33, 255–259 (1984). https://doi.org/10.1007/BF00951052
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DOI: https://doi.org/10.1007/BF00951052