Showing papers in "Applied Catalysis in 1982"

TL;DR: This article showed that the presence of cobalt or nickel improves the reducibility of iron based catalysts and increases the Fe2+/Fe3+ ratio in the mixed oxide catalyst precursors.

TL;DR: In this article, it was concluded that the reaction proceeded through the route (1) 2CH3OH → HCOOCH3 + 2H2 (2) HCOO CH3 + H2O → HCCOH + CH3OH (3) HCOH → C02+H2 in which no carbon monoxide took part.

TL;DR: The results of several types of studies on platinum-iridium and platinum-rhenium reforming catalysts are reported in this article, which reveal differences in the nature of the catalysts and in their performance in reforming.

TL;DR: In this paper, the reaction of methanol on zeolites with different pore structures (H-T, NaH-Y, H-ZSM-5 and H-L) was studied between 250°C and 450°C in a flow reactor.

TL;DR: In this article, the catalytic conversion of ethanol over zeolite H-ZSM-5 in the presence of water has been studied as a model system for converting ethanol-containing aqueous fermentation mixtures.

TL;DR: In this paper, it has been claimed that the addition of manganese oxide, MnO, to an iron catalyst gives a marked increase in the olefin selectivity of iron catalysts.

TL;DR: In this paper, the results suggest that the molybdena forms a monolayer on the support surface, with the Ni 2+ ions in the oxide form of the catalysts being distributed between the M 2 layer and the aluminate matrix.

TL;DR: In this paper, the effects of the kind and amount of a cation introduced into 12-molybdophosphoric acid, H3PMo12O40, on its function as an acid-catalyst, its reducibility and reoxidizability, its oxidation activity, and its thermal stability are examined.

TL;DR: In this paper, co-precipitated nickel catalysts were investigated for activity in the H 2 /CO reaction and the results showed that the coprecimitated catalyst showed not only greater selectivity to higher hydrocarbons, but also greater activity.

TL;DR: In this paper, a possible mechanism for synthesizing from CO and CO2 is discussed in terms of a potential mechanism for synthesis from CO/CO2 in the presence of Cu-Zn catalysts, where the selectivity is influenced by the nature of the promoting oxides.

TL;DR: In this article, the rate of carbon deposition on nickel catalysts as a function of mean crystalli´te size in the steam reforming of butane was investigated. And the relationship between the coking rate of catalysts and the mean size of nickel crystallites has been found and interpretation of the results obtained is proposed.

TL;DR: In this article, the alkylation of benzene with ethanol over pure and modified (with phosphorous and boron) HZSM5 zeolites is reported.

TL;DR: In this article, a pulse microreactor was used to investigate the selectivity of m-xylene isomerization on H-ZSM-5 zeolites with different Si/Al ratios and degrees of cation exchange.

TL;DR: In this paper, a surface phase diagram of the catalyst was tentatively presented as a function of copper loading and calcination temperature, based on the results of ion exchange between the hydroxyl hydrogens on a silica surface and tetraimmine copper (II) ions.

TL;DR: In this paper, the percentage exposed of 9 supported catalysts (7 Pt and one each Pd and Rh) was studied independently in three Institutes using three different methods: volumetric adsorption of H2, O2 and CO; temperature-programmed reduction (TPR); and transmission electron microscopy (TEM).

TL;DR: In this article, the reaction rate for the catalyst particles in a pseudo-homogeneous model can be described by the following rate expression: Download : Download full-size image An intrinsic rate expression based on an assumed reaction mechanism has been proposed in literature.

TL;DR: In this article, a series of sul-fided Co, Mo and CoMo supported on γ-Al2O3 and SiO2 catalysts was investigated, after they had been used as catalysts for 8 h at 305°C and 30 bar pressure in contact with a mixture of thiophene, cyclohexene, cycloxide and hydrogen.

TL;DR: In this paper, a steam reforming of methanol CH 3 OH + H 2 O = CO 2 + 3H 2 was carried out over a variety of catalysts which contained various amounts of copper loaded on silica.

TL;DR: In this paper, surface acidity and basicity, and catalytic activity and selectivity in 1-butanol dehydration at 573 K were measured with pure alumina and with aluminas modified by the addition of 0.6-4.8 wt % of selected ions.

TL;DR: In this article, the authors measured the kinetics of methanation of carbon monoxide on a 5% nickel on silica catalyst in a differential flow micro-reactor at temperatures from 460 up to 840 K, carbon dioxide pressures from 1 to 650 Torr and hydrogen pressures from 55 to 700 Torr.

TL;DR: In this paper, the authors used reported data as indirect evidence for the hydrogenation-elimination mechanism of hydrodesulphurization of aromatic sulphur heterocycles.

TL;DR: In this article, a novel catalyst-reactor combination was used to determine the kinetics of carbon monoxide methanation on nickel over a wide range of reaction conditions in the absence of transport influences.

TL;DR: In this paper, two ways of artificially depositing metals on a cracking catalyst are presented, one consists of an impregnation with metal naphthenates followed by steam aging and final evaluation of product yields by a cracking cycle.

TL;DR: In this paper, the performance of some catalysts for the tail-end selective hydrogenation of acetylene were tested in a micropilot plant, and the influence of temperature, carbon monoxide concentration and H 2 /C 2 H 2 ratio on the activity and selectivity were investigated.

TL;DR: In this paper, the specific catalytic activity (SCA) and apparent activation energies (AAE) for the catalytic hydrogenation of 1-hexene in the liquid phase were determined for a series of nickel catalysts supported on AlPO 4, Al PO 4 -Al 2 O 3 and AlPO O 3 systems, containing 5, 10 and 20 wt % nickel with wide ranges of dispersion, at an initial pressure of 0.41 MPa and temperatures between 298 and 323 K in methanol as solvent.

TL;DR: The properties of MgO when used as a support material for Ru-Au catalysts have been investigated by thermal analysis, chemical analysis, surface area measurements and X-ray diffraction as mentioned in this paper.

TL;DR: In this article, the methanation activity of unsupported and alumina supported nickel and nickel borides, prepared by sodium borohydride reduction, was determined during in situ exposure to 10 ppm H 2 S at 525 K and 13 atm as a function of time using a recently developed deactivation model.

TL;DR: In this article, the flux equation for the transition region between Knudsen flow and viscous flow with slip was derived for a capillary and transformed for a porous medium using the model of mean transport pore where the slip constant was considered to be an adjustable parameter.