Titlebook: Sintering and Catalysis; G. C. Kuczynski Book 1975 Plenum Press, New York 1975 Activation.catalysis.ceramics.electron microscopy.glass.kin

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Preparation and Thermostability of Supported Metal Catalystsring depends on a number of properties that can vary appreciably in supported metal catalysts. Before the mechanism of sintering can be decided on, these properties must be known at least qualitatively.

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Sintering and Catalysisficiency and often not well understood by the laboratory chemist, may result, in principle, from many reasons. One of the most suspected is the presence in the reactants of poisons which cover permanently the catalyst and compete therefore for the chemisorption of reagents. But also, the reaction pr

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Sintering of Supported Metal Catalysts: Application of a Mechanistic Model to Experimental Datadiameter). One of the functions of the support is to physically separate the metal crystallites and thereby hinder the agglomeration of the metal crystallites. This agglomeration would decrease the metal surface area and therefore cause a loss of catalytic activity. This process of metal particle gr

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Effects of Gas- and Liquid-Phase Environments on the Sintering Behavior of Platinum Catalyststrocatalyst in fuel cells and for catalytic mufflers in the exhaust systems of automobiles. The performance of Pt as a catalyst in these heterogeneous catalysed systems is dependent upon the Pt activity and the real Pt surface area accessible to the reactant (in the absence of catalyst deactivation

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Sintering Retardation in Catalysts a retention of very high surface area in temperature and time regimes which would result in severe sintering of pure iron (1). This has been interpreted alternatively as an equilibrium fine particle size due to strain energy (1) and maintenance of particle size through a reduction in sintering kine

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Sintering of Supported Metalshis paper includes a general discussion of experimental techniques, laboratory observations, and mathematical models used in examining catalyst sintering. Examples are taken primarily from literature reports on supported platinum. The performance of sintered catalysts will also be discussed, and rec

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Quasi-Equilibria and Sintering in the Cobalt Oxide — Zirconia Catalyst — Support Systemthe cobalt oxide consists of a two-dimensional, dispersed “δ-phase” of as yet undetermined stoichiometry. At higher concentrations, a saturated δ-phase is in equilibrium with bulk, or “β-phase” particles. The latter appear to be Co.O. spinel particles. The saturated δ-phase has about 4.5 × 10. Co at

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A Study of Capillarity and Mass Transport on the A12O3 Surfaceace orientation. The rate of the decay of the amplitude of sinusoidal gratings and that of the width of the grain boundary grooving were measured as a function of temperature and orientation to give the rate constants of capillarity induced mass transport.

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Effect of Ambient Atmosphere on Sintering of αA12O3 Supported Pt Catalystsples revealed a signal effect of average crystallite size upon CO oxidation (structure sensitivity) at low CO partial pressures, while structure insensitivity was manifested for the same reaction at higher CO partial pressures..Sintering kinetics in air followed approximately second order kinetics,