Showing papers in "Catalysis Today in 2010"

TL;DR: In this paper, the authors discuss the recent advancement on ultra low sulfur diesel (ULSD) production from both scientific and applied point of view, highlighting the importance of catalyst selection and hydrogen consumption issues.

TL;DR: In this paper, the role of surface chemistry in carbon catalysis is reviewed, with particular emphasis on those cases where the active sites have been properly identified, and useful activity correlations established.

TL;DR: In this paper, the main causes of catalyst deactivation in cobalt-based Fischer-Tropsch synthesis are poisoning, reoxidation of cobalt active sites, formation of surface carbon species, carbidization, surface reconstruction, sintering of crystallites, metal support solid state reactions and attrition.

TL;DR: In this article, the deactivation of catalysts during methanol conversion is investigated for elucidating how spatial constraints interfere mechanistically, and detailed product composition, including retained organic matter, is determined in a time resolved mode.

TL;DR: In this article, a comprehensive study into the deactivation of a cobalt catalyst under realistic Fischer-Tropsch synthesis (FTS) conditions was performed and the following intrinsic deactivation mechanisms were identified: sintering of Co active phase, carbon deposition and surface reconstruction.

TL;DR: A series of W-doped CeO2/TiO2 catalysts prepared by different impregnation methods assisted with ultrasonic energy were investigated for the selective catalytic reduction (SCR) of NOx (NO and NO2) by NH3 as mentioned in this paper.

TL;DR: In this article, the NH3-SCR reactions were systematically investigated over a commercial copper zeolite catalyst in view of its application to the DeNOx aftertreatment of exhaust gases from light and heavy-duty Diesel engines.

TL;DR: In this article, the electrochemical oxidation of ethanol has been studied on platinum and gold electrodes by a combination of electrochemical and spectroscopic techniques in electrolytes of varying pH and composition, the latter primarily determined by the buffering anions.

TL;DR: A panel of biocatalysis, organometallic catalysis, biomimetic catalysis and plasma oxidation processes developed by the research group for the activation of the environmental friendly oxidants oxygen and hydrogen peroxide in the oxidative functionalisation of lignin and lign in model compounds are reported.

TL;DR: In this article, the mean metal particle size of these materials was estimated by HRTEM and turnover frequencies were calculated using these data, and the selectivity of these catalysts was found to be only weakly dependent on the reaction temperature and the formic acid conversion.

TL;DR: In this paper, different mixed oxide catalysts have been used to obtain acrylic acid directly from glycerol using different techniques (XRD, SEM, BET and TGA-DSC).

TL;DR: In this article, it was shown that it is possible to produce methane from an exclusively inorganic way using CO 2 and H 2 on a Rh/γ-Al 2 O 3 catalyst at low temperature and atmospheric pressure.

TL;DR: In this article, the photocatalytic degradation kinetics of three sulfa pharmaceuticals have been investigated in TiO2 aqueous suspension, and the results indicated that many intermediates were produced during the photo-catalytic transformation of these pharmaceuticals.

TL;DR: In this article, the authors provide a comprehensive overview of catalytic functions, using select data from various representative Cu-and Fe-zeolite catalysts, and provide a concise experimental protocol, elucidating multiple catalytic function, steady-state and transient, of practical relevance to the mobile SCR applications.

TL;DR: In this paper, a sample of calcined mesoporous silica SBA-15 was added to an aqueous sucrose solution followed by drying and calcination at different temperatures, and the obtained hybrid Si/C material was then sulfonated in H 2 SO 4, before the final removal of the silica template in order to stabilize the porous structure towards the liquid phase sulfonation treatment.

TL;DR: In this paper, two zeolites of different topology were subjected to desilication in the NaOH solutions of increasing concentrations, and it was shown that desilization led to the formation of mesopores.

TL;DR: In this article, the selective catalytic reduction (SCR) of NO with NH3 over Mn substituted iron titanate catalyst (Fe0.75Mn0.25TiOx) was fully investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy.

TL;DR: In this paper, aqueous phase hydrogenolysis of glycerol to 1,2-propanediol (1-2-PDO), catalyzed by an admixture of 5.5% Ru/Al 2 O 3 and 5.1% Pt/Al O 3 catalysts in varying amounts, without externally added hydrogen is reported with comprehensive characterization of liquid and gas phase products.

TL;DR: In this paper, high cetane index renewable diesel can be obtained by hydroprocessing of palm oil using conventional hydrotreating catalyst (NiMo/γAl2O3).

TL;DR: In this paper, the use of conductive-diamond electrochemical oxidation (CDEO) in the treatment of industrial wastes is described, and it is shown that it is a good technology to treat many industrial effluents with organic loads below 20000mg/m−3, very efficient, robust and nonselective.

TL;DR: In this article, the photoactive layer of TiO 2 was deposited on glass spheres using the sol-gel dip-coating technique and the film was characterized by X-ray diffraction and scanning electron microscopy (SEM).

TL;DR: In this article, the photocatalytic activity of Rhodamine B over NaBiO3/BiOCl photocatalyst was evaluated under visible light (λ < 400 nm) irradiation.

TL;DR: In this paper, a comparison of the catalytic effects of several Keggin type POMs, including H3PWxMo12−xO40 (x = 1, 3, 6), Cs2.5H0.5PW12O40, and H 3PW 12O40 was made, using the solution of DBT in normal octane as simulated diesel oil, H2O2 as oxidant, and acetonitrile as extractant.

TL;DR: In this article, a mesoporous network of zinc oxalate has been used as a solid catalyst for transesterification processes, which can reveal the corresponding pore size distributions, thus avoiding lixiviation of the active phase in the reaction medium.

TL;DR: In this article, the results of in situ diffuse reflectance infrared Fourier transform (in situ DRIFT) spectroscopy and temperature programmed desorption (TPD) profiles indicated that the active sites of the Mn-Ce/TiO 2 catalyst were seriously sulfated at 200°C which led to an irreversible deactivation of the sample.

TL;DR: In this article, Pd nanoparticles supported on carbon nanotubes (CNTs) showed a higher selectivity than Pd particles supported on activated carbon (AC) in the liquid phase oxidation of benzylic alcohol to benzaldehyde.

TL;DR: In this article, different liquid phase thermal treatments were applied to a commercial activated carbon (Norit ROX 0.8) in order to produce modified activated carbons with varying surface chemistry and increased acidic character.

TL;DR: In this article, the decarboxylation rate of pure fatty acids was studied in a semibatch reactor over 1.5 kg Pd/C (Sibunit) using five different fatty acids, C17, C20 and C22, as feeds.

TL;DR: In this article, the authors survey the recent achievements in the preparation of polyoxometalate-based heterogeneous catalysts using different immobilization techniques, such as embedding into a silica matrix by sol-gel method, irreversible adsorption on active carbon, electrostatic attachment to NH2-modified mesoporous silica, and incorporation within nanocages of the metal-organic framework MIL-101.

TL;DR: In this article, the surface reducibility of the Pt/Ce-TiO-sub 2 catalyst was investigated for WGS reaction on catalysts based on platinum supported over CeO, TiO{sub 2, and Ce-modified TiOsub 2 supports.