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Showing papers in "Catalysis Today in 2001"


Journal ArticleDOI
TL;DR: In this paper, a review of the most popular IR spectroscopy applications for catalytic applications is presented, starting from the very general basis of the spectroscopic method applied and focusing on the adsorption of chelating compounds on surfaces of mineral oxides.

433 citations


Journal ArticleDOI
Jimmie L. Williams1
TL;DR: Extruded monolith substrates are widely used in automotive and stationary emission control reactors such as selective catalytic reduction (SCR) units as discussed by the authors, and they are increasingly being used, developed, and evaluated as catalyst supports in many new reactor applications such as chemical and refining processes, catalytic combustion, ozone abatement, and others.

337 citations


Journal ArticleDOI
TL;DR: In this paper, the authors focus on the investment costs of low-pressure synthesis, once-through designs, and advanced reforming technologies, and focus on one major goal, i.e. minimising the investment cost.

288 citations


Journal ArticleDOI
TL;DR: In this article, the effects of the major preparation variables (HNO 3 and H 2 O concentrations in the dispersion, withdrawal velocity, drying temperature, number of dipping cycles, calcination temperature) on the deposited coating load and on the adherence of the washcoat are investigated.

266 citations


Journal ArticleDOI
TL;DR: In this paper, the peculiarities of the IR studies of adsorption on semiconducting oxides are reviewed with special attention to SnO2, and the specificity of SnO 2 is evidenced upon interaction of a stoichiometric (CO+NO) mixture at r.t.

227 citations


Journal ArticleDOI
TL;DR: In this paper, the kinetic behavior of the Ni/La2O3 catalyst in the reforming reaction of methane with carbon dioxide was investigated as a function of temperature and partial pressures of CH4 and CO2.

221 citations


Journal ArticleDOI
Bo-Qing Xu1, Jun-Mei Wei1, Hai-Yan Wang1, Ke-Qiang Sun1, Qiming Zhu1 
TL;DR: In this paper, a novel preparation method for MgO nanocrystals was reported, which makes use of a conventional hydrogel of Mg(OH) 2 derived from inorganic magnesium chloride.

211 citations


Journal ArticleDOI
TL;DR: In this article, the effect of the CVD synthesis conditions on the loading rate of anatase TiO2 was investigated and it was found that introducing water vapor during CVD or adsorbing water before CVD was crucial to obtain anataseTiO2 on the surface of the particle supports.

209 citations


Journal ArticleDOI
TL;DR: In this article, a consensus map was used to identify catalysts that showed high activity for both reactions and good resistance to anodic corrosion in the Pt-Ru-Ir ternary.

203 citations


Journal ArticleDOI
TL;DR: In this paper, a group 4 transition metal complexes having two phenoxy-imine ligands, FI Catalysts, were synthesized and investigated as olefin polymerization catalysts using ethylene at atmospheric pressure.

193 citations


Journal ArticleDOI
TL;DR: In this paper, the CO oxidation activity of the mixed oxides was found to be dependent on the Ce/Zr ratio, which relates to the degree of reducibility.

Journal ArticleDOI
TL;DR: In this paper, the authors show that monolithic catalytic this paper can play a role in process intensification because they allow exceptionally large rates and selectivities, and they can also be used in multifunctional reactors.

Journal ArticleDOI
TL;DR: In this article, a series of composite membranes prepared by incorporation of boron phosphate into polymeric matrix of sulfonated PEEK were studied and the conductivity of the composites was found to exceed largely that of pure SPEEK polymer.

Journal ArticleDOI
TL;DR: In this article, the distribution of the organic nitrogen compounds in feed and hydrotreated products is discussed and the dominant and most refractive organic nitrogen compound in the feed is found to be carbazoles.

Journal ArticleDOI
TL;DR: In this paper, the authors presented the effect of palladium membrane on the conversion of methanol reformed to the hydrogen by steam, which was carried out over Cu/ZnO/Al2O3 catalysts at 350°C and the stability of the catalyst was affected by the composition of Cu, Zn, and Al.

Journal ArticleDOI
TL;DR: In this article, the authors studied the activity of multi-component catalysts in low temperature CO oxidation and the oxidation of CH 4 and found that the observed activities are directly related to the average Au particle size.

Journal ArticleDOI
TL;DR: In this article, a series of mesoporous Fe-MCM-41, Co-Co MCM41 and Ni-MCMCM41 catalysts with different quantity of the metal incorporated in the framework were synthesized and characterized (as-synthesized samples and those after reaction) by X-ray diffraction pattern (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) techniques.

Journal ArticleDOI
TL;DR: The evidence for the pore mouth catalysis model for n-alkane methylbranching on Pt/H-ZSM-22 catalyisomerization catalyst is reviewed in this paper.

Journal ArticleDOI
TL;DR: In this article, the authors show that thermal stability is strongly dependent on wall thickness, a property which can be controlled by adjusting the alkalinity and the surfactant/silica ratio in the synthesis.

Journal ArticleDOI
TL;DR: Pervaporation-aided esterification of acetic acid with ethanol at 343 K using zeolite T membranes was investigated in this paper, where almost complete conversion was reached within 8 h when initial molar ratios of alcohol to acetic acids were 1.5 and 2.

Journal ArticleDOI
TL;DR: In this paper, the effect of the internal mass transfer on the photocatalytic degradation rate over different catalyst layer thickness under two different illuminating configurations was analyzed theoretically and later experimentally verified.

Journal ArticleDOI
TL;DR: The role of palladium precursors (e.g. chloride and acetylacetonate) in the catalytic properties of Pd/Al2O3 catalysts toward CO oxidation was investigated in this paper, where the characterization techniques used for mapping the Pd sites were H2 and CO chemisorption, infrared spectroscopy (FTIR) of CO adsorbed, and temperature-programmed desorption (TPD).

Journal ArticleDOI
TL;DR: In this article, the SAXS measurements show that the hexagonal mesoscopic organization of SBA-15 support with pore diameter of 5.5-6.5 nm is almost retained even after addition of 20-mass% Co.

Journal ArticleDOI
TL;DR: The catalytic activity and selectivity of palladium supported on various metal oxides and zeolites in carbon-carbon coupling reactions of aryl bromides with olefins (Heck reaction) are reported and reviewed in this article.

Journal ArticleDOI
TL;DR: The crystalline properties of zirconia synthesized by the precipitation and sol-gel methods were comparatively studied in this article, where samples were characterized with thermoanalysis and X-ray powder diffraction techniques.

Journal ArticleDOI
TL;DR: In this paper, the authors describe the structure and performance of the PEM fuel cell considered as a membrane reactor and develop an analytical transport reaction model that, despite some assumptions, captures the essential features of the device very well.

Journal ArticleDOI
TL;DR: In this article, different flowsheets (batch and continuous) of photocatalytic membrane reactors, to be used for degradation of organic pollutants present in water, together with some experimental results, are reported.

Journal ArticleDOI
TL;DR: The addition of oxygen to the immobilized system appeared to increase the quantum yield with a factor 4, whereas the addition ofoxy to the suspended system hardly had any effect.

Journal ArticleDOI
TL;DR: A perovskite-type oxide of Ba0.5Sr0.8Fe0.2O3−δ (BSCFO) showed mixed (electronic/oxygen ionic) conductivity at high temperatures as discussed by the authors.

Journal ArticleDOI
TL;DR: In this paper, waste polyethylene and polystyrene were cracked thermally or in the presence of catalyst and hydrogen in closed autoclaves, and the obtained products were submitted to analysis, unsaturated hydrocarbons in gasoline and diesel fuel range boiling were hydrogenated over platinum catalyst.