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Synthesis of Methanol from CO over Ca-Promoted Pt/SiO₂

Author： Watling T.C. Gusovius A.F. Prins R.

Publisher： Academic Press

ISSN： 0021-9517

Source： Journal of Catalysis, Vol.188, Iss.1, 1999-11, pp. : 233-236

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Pt/SiO₂ and Ca-promoted Pt/SiO₂ catalysts were prepared from three different Pt precursors and tested for CO hydrogenation at 280°C and 25 bar. Changing the Pt precursor affects both the activity and selectivity of the resulting catalyst. The measure of activity enhancement for methanol on addition of the promoter increases in the order [Pt(NH₃)₄](OH)₂2[Pt(OH)₆]2[PtCl₆]. A correlation between the activity enhancement on Ca addition and the extent of metal–promoter interaction, as measured by the change in the temperature-programmed reduction profile and loss of chemisorption capacity, was observed. This suggests that the dopant needs to be located on the metal particle in order to promote the reaction.

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