KINETICS OF METHYLCYCLOHEXANE DEHYDROGENATION OVER PT—Al<sub>2</sub>O<sub>3</sub>

Sinfelt, J. H.; Hurwitz, H.; Shulman, R. A.

doi:10.1021/j100839a054

Cited by 96 publications

(37 citation statements)

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“…3, where they are compared with the CO/Pt ratio. For all the tested catalysts, the conversion is high (more than 70%) and this conversion can be taken as the catalytic activity because the reaction has zero-order kinetics [21]. In the experimental conditions, mass transfer limitations are absent, as shown by calculating the Weisz-Prater criterion for internal mass transfer (F ( 0.01) and the Damköhler number (Da % 0) for external mass transfer.…”

Section: Resultsmentioning

confidence: 99%

Metal dispersion and catalytic activity of trimetallic Pt-Re-Sn/Al2O3 naphtha reforming catalysts

et al. 2005

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Section: Resultsmentioning

confidence: 99%

Metal dispersion and catalytic activity of trimetallic Pt-Re-Sn/Al2O3 naphtha reforming catalysts

et al. 2005

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“…This may be the case in cyclohexane dehydrogenation, that is, desorption of the benzene product controls the reaction rate. On addition of copper to nickel, the heat of adsorption of benzene would be expected to decrease, leading to a corresponding decrease in the activation energy of the desorption step, This suggestion is based on earlier work on the dehydrogenation of methylcyclohexane to toluene on platinum (Sinfelt et al, 1960b) where it was concluded that the reaction rate was limited by desorption of the toluene product. This would account for the initial enhancement of the rate of cyclohexane dehydrogenation with addition of the first increments of copper to nickel.…”

Section: Hydrogenolysis and Dehydrogenation On Bimetallic Catalystsmentioning

confidence: 99%

Catalytic specificity

Sinfelt

1973

AIChE Journal

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SCOPECatalytic specificity refers to the particular ability of a substance or closely related group of substances to catalyze a given type of chemical transformation. Identifying the type of catalyst which is good for a particular reaction is a matter of great practical importance. In the area of heterogeneous catalysis, to which this review is limited, there are few, if any, examples where the factors determining catalytic specificity are understood in detail. However, much progress has been made in establishing patterns of variation in catalytic behavior from one substance to another for various types of reactions. In particular, broad relationships are often evident between the catalytic activity of an element or its compounds and the position of the element in the periodic table. These relationships introduce a measure of order into heterogeneous catalysis and will be useful in the development of a more fundamental understanding of the subject.The present review considers a variety of classes of reactions from the standpoint of assessing patterns of variation in behavior among catalysts. The types of reactions considered include hydrogenation, hydrogenolysis, isomerization, ammonia synthesis and decomposition, oxidation, and the decomposition of alcohols and organic acids. Relationships between catalytic activities and the chemisorption properties of reactants are discussed repeatedly. Both metal and oxide type catalysts are considered. However, most of the emphasis is on metals, for which more extensive data comparing specific catalytic activities are available.

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“…Dehydrogenation of methylcyclohexane (MCH) to toluene (Tol) is considered as an important catalytic-reforming process used to enhance the octane number of gasoline [1][2][3]. Moreover, this catalytic reaction has a considerable interest to extract the hydrogen stored in toluene in the form of MCH as a safe way for hydrogen storage and transportation [4].…”

Section: Introductionmentioning

confidence: 99%