Kinetics of ethane hydrogenolysis

Sinfelt, J. H.

doi:10.1016/0021-9517(72)90188-1

Cited by 99 publications

(40 citation statements)

References 4 publications

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“…On the other hand, while in the case of C 5 H 12 and C 6 H 14 the orders versus hydrogen were highly negative, between )0.5 and )3.4 [35,38], depending on the reaction; in the case of C 7 H 16 , the orders were positive between +0.2 and +1.8 [36,37]. The only way to resolve this contradiction was to modify the kinetic schemes that were proposed previously [31,32,39]. In fact, in these schemes, they both involve a series of dehydrogenation steps, all equilibrated, followed by the rate-determining step, which is the skeletal rearrangement of the highly dehydrogenated species.…”

Section: Mechanism Of Isomerization Of Hydrocarbons On Metalsmentioning

confidence: 77%

“…Particular attention must be given to the interpretation of the results obtained on various transition metals [28,31]. Use was made of the kinetic analysis proposed in 1954 by Cimino et al [32] for iron catalysts, and the rate determining step was assumed to be identical on all metals where the experimental order with respect to hydrogen is negative.…”

Section: Exchange Reactions Where C-c Bond Ruptures Are Involved In Amentioning

confidence: 99%

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Site requirements in the kinetics of alkane transformations catalysed by metals

Garin

2006

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Hydrogen pressure is often found to cause an inhibiting effect on the kinetics of alkane reactions on metal surfaces. The most common interpretation of such results is focussed on the degree of dehydrogenation of the active surface intermediate following a dissociative mechanism. A series of arguments will be given in favour of an associative mechanism in which the hydrocarbon reacts with an adsorbed hydrogen atom. In this mechanism, the adsorption site or ''landing site'' is composed of a chemisorbed hydrogen atom associated with an ensemble of ''Z'' potential sites. These sites are associated with the hydrogen chemisorption site. The validity of H 2 adsorption to determine the metallic dispersion will be also discussed.

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Section: Mechanism Of Isomerization Of Hydrocarbons On Metalsmentioning

confidence: 77%

Section: Exchange Reactions Where C-c Bond Ruptures Are Involved In Amentioning

confidence: 99%

Site requirements in the kinetics of alkane transformations catalysed by metals

Garin

2006

Top Catal

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“…However, the dehydrogenation products resulting from reactions (f) steps 6 and 7 look remarkably like the di-sigma bonded CgHgCa) species pro posed by Sinfelt (45,48,60) as the intermediate in the ethane hydrogenolysls reaction over ir. If it were the case that these surface species were the same, addition of ethylene should not poison the hydrogenolysis reaction, but in fact at 100°C it does.…”

Section: Z Omentioning

confidence: 92%

Interactions of hydrogen with ethylene and ethane on iridium

Mahaffy

1977

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“…Due to the importance of hydrogenolysis in petroleum reforming, its kinetics has been studied quite extensively, namely by Sinfelt (1972), Guczi et al (1974), Forster and Otto (1980), Kristyan (1983), and Szamosi (1984, 1988 by Kristyan and Szamosi (1984) produced a satisfactory account for the main features of the experimentally observed results. The first step is the fast, dissociative adsorption of ethane and hydrogen:…”

Section: Self-poisoning On Two Types Of Active Sitesmentioning

confidence: 99%

Kinetic model of parallel self‐poisoning in the catalytic hydrogenolysis of ethane on single‐type surface sites

Szamosi¹,

Kristyán

1991

Can J Chem Eng

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A kinetic model for parallel competitive self-poisoning in the catalytic hydrogenolysis of ethane has been developed. It is assumed that molecular hydrogen is the bond-splitting agent in the rate-determining step, and self-poisoning itself is reversible. In addition, all active surface sites are taken to be of the same kind. The model provides a satisfactory account of the experimentally observed kinetic behavior. ~~ . .... . .On a mis au point un modkle cinCtique pour I'auto-empoisonnement cornpetitif parallble dans I'hydrogenolyse catalytique de I'Cthane. On suppose que l'hydrogbne moliculaire est I'agent de bris des liaisons dans I'Ctape determinant la vitesse et que I'auto-empoisonnement est riversible. En outre, tous les sites de surface actifs apparaissent de m&me nature. Le modele rend compte de manikre satisfaisante du comportement cinktique observe expkrimentalement.

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Kinetics of ethane hydrogenolysis

Cited by 99 publications

References 4 publications

Site requirements in the kinetics of alkane transformations catalysed by metals

Site requirements in the kinetics of alkane transformations catalysed by metals

Interactions of hydrogen with ethylene and ethane on iridium

Kinetic model of parallel self‐poisoning in the catalytic hydrogenolysis of ethane on single‐type surface sites

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