Journal Articles (before-1995)

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    Thermodynamics of Liquid Mixtures of Methane and Ethene
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (09), 1977) Calado, Jorge C. G.; Soares, VirgIlio A. M.
    The total vapour pressure of liquid mixtures of methane and ethene has been measured as a function of composition at 103.94 and 115.77 K. The results have been used to estimate the excess Gibbs energy GE at these temperatures. The volume of mixing PE has been determined at 103.94 K and is found to be small and negative. In a comparison with the values of GE obtained by other authors, an attempt was made to estimate the value of HE, the molar enthalpy of mixing. The results are interpreted in the light of some simple theories of mixtures, suggesting that this is a case where the Lorentz rule of combination of collision diameters is valid.
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    Role of the Catalyst Support in the Oxidation of Methane over Palladium
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (8), 1972) Cljllis, C. F.; Nevell, T. G.; Trimm, D. L.
    The influence of the catalyst support on the oxidation of methane over palladium has been studied using a microcalorimctric bead reactor. The nature of the support had no detectable influence on the catalytic activity during a given experiment, but was found to affect the long-term stability of the catalyst. Investigations have been made of the kinetics of the oxidation of methane over a palladium/thoria catalyst both in the absence and in the presence of the reaction products. Oxidation was found to be strongly inhibited by the water formed, which tended to cause permanent deactivation of the catalyst; there was also very slight inhibition by carbon dioxide. Measurements of the rates of co-oxidation of methane with other compounds showed that methanol reacted independently, whereas formaldehyde and carbon monoxide were both oxidized competitively. It has been shown that the reactivity of water towards the catalyst support is an important factor governing the deterioration of catalytic activity. In accordance with this there was no evidence of catalyst deactivation when methane was co-oxidized with methanol, which would be expected to displace water.