Promoter effects in the Pt-catalysed oxidation of propylene glycol

H.H.C.M. Pinxt; B.F.M. Kuster; G.B.M.M. Marin

doi:10.1016/S0926-860X(99)00304-X

Promoter effects in the Pt-catalysed oxidation of propylene glycol

H.H.C.M. Pinxt, B.F.M. Kuster, G.B.M.M. Marin

Chemical Reactor Engineering

Research output: Contribution to journal › Article › Academic › peer-review

61 Citations (Scopus)

Abstract

Oxidation of aqueous solutions of propylene glycol has been performed at 333 K, pH = 8 using Pb-, Bi- and Sn-promoted Pt/graphite catalysts. Oxidation of propylene glycol towards pyruvic acid proceeds via two pathways, one via hydroxyacetone, the second via lactic acid. Experiments, performed under oxygen mass transfer limitations to avoid de-activation by over-oxidation showed significant effects of the promoters on both activity and selectivity. The addition of Pb and Bi enhances oxidation of lactic acid resulting in higher yields of pyruvic acid. The addition of Sn leads to high selectivities for both hydroxyacetone and pyruvic acid. The effect of Sn can be explained by the formation of a Sn–diol complex, where Sn is in the Sn(IV) state.

Original language	English
Pages (from-to)	45-54
Number of pages	9
Journal	Applied Catalysis. A, General
Volume	191
Issue number	1-2
DOIs	https://doi.org/10.1016/S0926-860X(99)00304-X
Publication status	Published - 2000

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title = "Promoter effects in the Pt-catalysed oxidation of propylene glycol",

abstract = "Oxidation of aqueous solutions of propylene glycol has been performed at 333 K, pH = 8 using Pb-, Bi- and Sn-promoted Pt/graphite catalysts. Oxidation of propylene glycol towards pyruvic acid proceeds via two pathways, one via hydroxyacetone, the second via lactic acid. Experiments, performed under oxygen mass transfer limitations to avoid de-activation by over-oxidation showed significant effects of the promoters on both activity and selectivity. The addition of Pb and Bi enhances oxidation of lactic acid resulting in higher yields of pyruvic acid. The addition of Sn leads to high selectivities for both hydroxyacetone and pyruvic acid. The effect of Sn can be explained by the formation of a Sn–diol complex, where Sn is in the Sn(IV) state.",

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T1 - Promoter effects in the Pt-catalysed oxidation of propylene glycol

AU - Pinxt, H.H.C.M.

AU - Kuster, B.F.M.

AU - Marin, G.B.M.M.

PY - 2000

Y1 - 2000

N2 - Oxidation of aqueous solutions of propylene glycol has been performed at 333 K, pH = 8 using Pb-, Bi- and Sn-promoted Pt/graphite catalysts. Oxidation of propylene glycol towards pyruvic acid proceeds via two pathways, one via hydroxyacetone, the second via lactic acid. Experiments, performed under oxygen mass transfer limitations to avoid de-activation by over-oxidation showed significant effects of the promoters on both activity and selectivity. The addition of Pb and Bi enhances oxidation of lactic acid resulting in higher yields of pyruvic acid. The addition of Sn leads to high selectivities for both hydroxyacetone and pyruvic acid. The effect of Sn can be explained by the formation of a Sn–diol complex, where Sn is in the Sn(IV) state.

AB - Oxidation of aqueous solutions of propylene glycol has been performed at 333 K, pH = 8 using Pb-, Bi- and Sn-promoted Pt/graphite catalysts. Oxidation of propylene glycol towards pyruvic acid proceeds via two pathways, one via hydroxyacetone, the second via lactic acid. Experiments, performed under oxygen mass transfer limitations to avoid de-activation by over-oxidation showed significant effects of the promoters on both activity and selectivity. The addition of Pb and Bi enhances oxidation of lactic acid resulting in higher yields of pyruvic acid. The addition of Sn leads to high selectivities for both hydroxyacetone and pyruvic acid. The effect of Sn can be explained by the formation of a Sn–diol complex, where Sn is in the Sn(IV) state.

U2 - 10.1016/S0926-860X(99)00304-X

DO - 10.1016/S0926-860X(99)00304-X

M3 - Article

SN - 0926-860X

VL - 191

SP - 45

EP - 54

JO - Applied Catalysis. A, General

JF - Applied Catalysis. A, General

IS - 1-2

ER -

Promoter effects in the Pt-catalysed oxidation of propylene glycol

Abstract

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