Interaction of polyols with ruthenium metal surfaces in aqueous solution

    Research output: Contribution to journalArticle

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    Abstract

    The irreversible adsorption and decomposition of glycerol and other polyhydric alcohols over ruthenium metal at 298-353 K has been examined in a recirculating microreactor system. The quantity of glycerol (GO), propylene glycol (1,2-propanediol, herein PG), ethylene glycol (EG), or 1,3-propanediol (1,3-PDO) adsorbed on a reduced and evacuated bulk Ru metal powder at saturation is 0.8 ± 0.2 μmol/g, a value approximately one-tenth that of CO adsorbed (9.0 μmol/g) on the same material. The quantity of polyol adsorbed is independent of temperature, but is strongly affected by the condition of the Ru surface - saturating the metal surface with hydrogen prior to exposure to the polyol significantly reduces the quantity of polyol adsorbed. When they are present together in solution, GO adsorbs more readily than PG, to the point of excluding PG from adsorbing when excess GO is present. Removal of adsorbed species in their original form by heating or flushing with water is not possible, but all carbon is accounted for as desorbed methane when the Ru catalyst is heated under hydrogen.

    Original languageEnglish (US)
    Pages (from-to)1979-1986
    Number of pages8
    JournalGreen Chemistry
    Volume11
    Issue number12
    DOIs
    StatePublished - 2009

    Profile

    Polyols
    Glycerol
    metal
    Metals
    Edema Disease of Swine
    Ruthenium
    Hydrogen
    ruthenium
    hydrogen
    Powder metals
    Glycols
    Ethylene glycol
    Propylene
    Methane
    Alcohols
    Decomposition
    Heating
    Adsorption
    Removal
    Catalysts

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Pollution

    Cite this

    Interaction of polyols with ruthenium metal surfaces in aqueous solution. / Peereboom, Lars; Jackson, James E.; Miller, Dennis J.

    In: Green Chemistry, Vol. 11, No. 12, 2009, p. 1979-1986.

    Research output: Contribution to journalArticle

    Peereboom, Lars; Jackson, James E.; Miller, Dennis J. / Interaction of polyols with ruthenium metal surfaces in aqueous solution.

    In: Green Chemistry, Vol. 11, No. 12, 2009, p. 1979-1986.

    Research output: Contribution to journalArticle

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    AB - The irreversible adsorption and decomposition of glycerol and other polyhydric alcohols over ruthenium metal at 298-353 K has been examined in a recirculating microreactor system. The quantity of glycerol (GO), propylene glycol (1,2-propanediol, herein PG), ethylene glycol (EG), or 1,3-propanediol (1,3-PDO) adsorbed on a reduced and evacuated bulk Ru metal powder at saturation is 0.8 ± 0.2 μmol/g, a value approximately one-tenth that of CO adsorbed (9.0 μmol/g) on the same material. The quantity of polyol adsorbed is independent of temperature, but is strongly affected by the condition of the Ru surface - saturating the metal surface with hydrogen prior to exposure to the polyol significantly reduces the quantity of polyol adsorbed. When they are present together in solution, GO adsorbs more readily than PG, to the point of excluding PG from adsorbing when excess GO is present. Removal of adsorbed species in their original form by heating or flushing with water is not possible, but all carbon is accounted for as desorbed methane when the Ru catalyst is heated under hydrogen.

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