Homogeneous Catalysis. General discussion

Egerton, Alfred Charles; Garner, W. E.; Hinshelwood, Hinshelwood; Coward, Hubert Frank; Lewis, Bernard; Moureu, Ch.; Jorissen, W. P.; Dhar, N. R.; Bäckström, Hans L. J.; Christiansen, J. A.; Emeléus, H. J.; Mardles, Mardles; Porter, Albert; Lowry, Lowry; Wynne‐Jones, W. F. K.; Christiansen, Christiansen; Jorissen, Jorissen; Taylor, T. W. J.; Garner, Garner; Giordani, Giordani; Böeseken, Böeseken; Euler, v.; Macdonald, J. Y.; Norrish, R. G. W.; Lapworth, Arthur; Walker, Ezekiel; McBain, McBain; Dawson, Dawson; Brönsted, Brönsted; Daniels, Farrington; Rice, F. O.

doi:10.1039/tf9282400697

Cited by 4 publications

(2 citation statements)

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“…Other powerful reasons, summarized elsewhere (Walsh 1949), make it certain th at the idea of the ethyl groups being responsible for the anti-knock action is untenable. In particular, it has been shown (Egerton & Gates 1927;Ricardo & Thorneycroft 1928) th at vapours from a lead arc can exert an effective anti-knock action.…”

Section: R E L a T I O N O F R E S U L T S O F § § 1 T O 7 T O O T H E R W O R Kmentioning

confidence: 99%

The inhibiting effect of lead tetraethyl I. The effect of lead compounds on the vapour phase slow oxidation of di is opropyl ether and on the ignition of diethyl ether

Chamberlain

Walsh

1952

Proc. R. Soc. Lond. A

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The effect of lead tetraethyl on various pressure-temperature regions of ether combustion is described. The inhibiting effect was found to persist after prolonged evacuation of the apparatus. Various experiments suggested that this was due to the deposition of lead oxide. Work has therefore been carried out to determine the effects of the oxides of lead on the slow oxidation and on the ignition of ethers. It is found that lead monoxide gives an inhibiting effect profound, persistent and in every way similar to that of lead tetraethyl. Experiments show that it does this by a surface destruction of chain centres. It is further shown that, on oxidation, lead tetraethyl gives rise to a fog of (probably lead monoxide) particles. Its inhibiting effect is then exerted either by these colloidal particles or by the film of lead monoxide to which they give rise on the walls of the vessel. Lead tetraethyl and lead monoxide inhibit, at both ‘low’ and ‘high ’ temperatures, both the slow oxidation of di is opropyl ether and the process leading to hot flames of diethyl ether. They have no effect on the induction period preceding a cool flame in diethyl ether and only a slight effect on the cool-flame ignition limit. They both reduce the pressure kick due to a cool flame. These results are briefly discussed and are related to other published work.

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Section: R E L a T I O N O F R E S U L T S O F § § 1 T O 7 T O O T H E R W O R Kmentioning

confidence: 99%

The inhibiting effect of lead tetraethyl I. The effect of lead compounds on the vapour phase slow oxidation of di is opropyl ether and on the ignition of diethyl ether

Chamberlain

Walsh

1952

Proc. R. Soc. Lond. A

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“…It follows that Cu2+ in mordenite is different from Cu2+ in CuO, the catalytic activity observed for Cu2 exchanged mordenite resulting from Cuz+ in cation-positions of the zeolite. If the same stoichiometry of CO-chemisorption as in mordenite can be assumed for zeolite Y, then it must be concluded from the sorption data that only 11 to 13% of Cu" in zeolite Y is accessible for CO as has already been reported [16]. The mechanism of oxygen activation in copper containing zeolites has been investigated by Benn et al [17]; the intrinsic catalytic activity of copper in zeolites for oxidation reactions is probably due to a mechanism which does not involve oxygen from the lattice.…”

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confidence: 82%

Influence of Additives to V₂O₅ on the Rate of 1‐Butene Oxidation

El-Salaam

Häuffe

1979

Ber Bunsenges Phys Chem

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The deviation from stoichiometric composition of V2O5 due to doping with Al3+ and W6+ ions in the range of concentration of 0.001 to 0.01 mol was studied. The change of excess electron concentration caused by doping was small as can be concluded from electrical measurements. The electric microbalance results show a higher deviation from stoichiometry by Al3+ ion doping where the catalyst composition reached V2O4.01 structure compared with V2O4.7 for V2O5 doped with W6+ ions. In general, the nature of the surface as well as the catalyst bulk properties were affected even by small additions of foreign cations. These effects on the oxidative dehydrogenation of 1‐butene were studied in a microflow reactor. An oxidation mechanism was proposed, where the oxygen exchange seems to be rate‐determining while all electronic steps are fast.

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