Showing papers in "Journal of Catalysis in 1972"

TL;DR: In the presence of a nickel catalyst, acetylene decomposed to form carbonaceous solids with filamentary, amorphous, or laminar form as discussed by the authors, and parameters controlling the type of deposit have been established.

TL;DR: In this article, the effect of adding copper to nickel was investigated for the hydrogenolysis of ethane to methane and the dehydrogenation of cyclohexane to benzene over a series of copper-nickel alloys.

TL;DR: In this article, it was shown that ruthenium is remarkably promoted by the addition of alkali metal, particularly when supported by active carbon (AC) or alumina.

TL;DR: In this article, a mixture of styrene and ethylbenzene was formed by alkylation of the methyl group of toluene on Na, K, Rb and Cs exchanged zeolites.

TL;DR: In this paper, the equilibria of the decomposition reactions of carbon monoxide and methane were studied in the temperature range 450-700 °C on various nickel catalysts by means of a thermogravimetric apparatus.

TL;DR: In this article, a cyclopentane-deuterium exchange has been followed on nickel and some nickel-copper alloys in the temperature range 200-430 °K.

TL;DR: In this article, a flow method was used to measure hydrogen chemisorption on supported platinum catalysts at ambient temperature, the data were in accord with results obtained by the conventional static method.

TL;DR: In this paper, the product distributions and Arrhenius parameters for the zero-order range have been determined for the dehydration on alumina of a series of primary, secondary, and tertiary aliphatic alcohols and for some alicyclic alcohols.

TL;DR: In this article, the experimental determination of the orders of reaction and deactivation in the nth order rate equation is discussed, which represents the four broad classes of deactivation of catalyst particles: parallel, series, side-by-side and independent.

TL;DR: In this article, the catalytic activities of transition-metal catalysts in methane formation from carbons were investigated at temperatures up to 1050 °C under atmospheric pressure of hydrogen, and it was shown that methane was produced in several stages and the temperature of maximal rate varied from one metal catalyst to another.

TL;DR: In this paper, the rate of hydrogenation of ethylene on PtSiO2 catalysts has been studied between 207 and 371 °K, and no evidence in their work for spillover of hydrogen from the metal to the alumina with enhanced rates of hydrogenated ethylene adsorbed on alumina.

TL;DR: In this article, thin films of silver, palladium and their alloys prepared by simultaneous sublimation onto Pyrex at 78 K and subsequently equilibrated at 573 K, were investigated by photoelectron emission to gain information on the surface composition by means of the work function (φ) and the emission constant (M).

TL;DR: In this article, the effect of sorbed molecules on the cation distribution was studied by adding ammonia, pyridine, naphthalene and butene to the dehydrated zeolite.

TL;DR: In this paper, a uranium-antimony-oxide (USb3O10) catalyst was used for the synthesis of acrylonitrile and acrolein, and the formation of an active and highly selective phase of this catalyst and its equally active but less selective precursor, USbO5, were followed by X-ray and low frequency infrared measurements in controlled temperature experiments.

TL;DR: By ESR technique, the formation of adsorbed O2− and O− on TiSiO2, VSiO2 and Vγ-Al2O3 has been studied as mentioned in this paper.

TL;DR: In this article, the acid properties of faujasite-type zeolites, X and Y, cationated, decationated and aluminum-deficient has led to the evaluation of α 0 which characterizes a structural acidity parameter.

TL;DR: In this paper, the chemisorption of hydrogen, oxygen and carbon monoxide on supported platinum was studied by a pulse technique, and the resulting adsorption stoichiometries were compared with literature data which either include measurements of size or which compare the adsorptions of two or more gases on the same solid.

TL;DR: In this article, the removal of aluminum atoms from faujasite-type zeolites has been studied with regard to acidity changes in the catalysts and the results show a heterogeneity attributable to structural requirements in the chemical properties of the aluminum atoms of the normal X or Y zeolite.

TL;DR: In this article, the Fischer-Tropsch reaction over triply promoted iron catalyst was studied in a differential reactor at 240 °C, in the pressure range 10 to 20 bar with synthesis gases of H2CO ratio varying from 1 to 7.

TL;DR: In this article, the influence of the method of preparation of catalysts and in particular the circumstances during the wet stage (precipitation, slurry reactions between preprecipitated oxyhydrates) have been investigated.

TL;DR: In this article, the electron donor properties of TiO2 and MgO have been investigated by tetracyanoethylene and trinitrobenzene adsorption.

TL;DR: In this article, a series of Rh η-Al 2 O 3 catalysts, under a variety of conditions, were investigated for hydrogen, oxygen, and carbon monoxide titration.

TL;DR: In this article, a broad ESR signal upon deammoniation and dehydroxylation of the NH4 forms of both zeolites in vacuum parallels a decrease in intensity of the normal paramagnetic Fe3+ ESR signals.

TL;DR: In this paper, the Pt particle size determinations were made from electron micrographs and from X-ray line broadening experiments following the chemisorption measurements on samples sintered in H 2 to various temperatures.

TL;DR: In this paper, the authors investigated the nature of the isomerization reaction of 1-butene over MgO and measured the selectivity ( cis/trans ratio) as a function of the catalyst pretreatment temperature which was varied from 300 to 900 °C.

TL;DR: In this paper, the isomerization at low conversion of six methylpentanes, labeled with carbon 13 in various positions, have been studied over a 0.2% PtAl 2 O 3 catalyst.

TL;DR: In this article, a method for the determination of the mean number of elementary electric charges acquired by one oxygen atom adsorbed on the surface of such oxides as NiO, CoO, MnO is proposed.

TL;DR: In this article, the authors determined the heat of immersion of α- and γ-alumina in water for samples outgassed at temperatures up to 600 °C.