[PDF] Top 20 Preparation and characterization of Mg-modified zirconias as catalysts for the direct synthesis of dimethyl carbonate (DMC)

... HCl as hydrolysis catalysts. Basic and acid sites of synthesized zirconia materials were characterized by XRD, BET, FTIR, CO 2 - TPD and NH 3 ...spectra and TGA conirmed ... See full document

... On the contrary, small pore size silica gives less active catalysts leading to high molecular weight polyethylene [2, ...9]. The above commented results evidence that both, support pore size ... See full document

... Introduction As a result of their very-large surface area and strong adsorption capacity, Activated Carbons, AC, are widely used in air and water purification, energy storage, carbon dioxide ... See full document

... S2 and S3, in fact for the latter it has been impossible to calculate this parameter since d 110 diffraction is completely ...indicates the addition in first order of the TEOS ... See full document

... evaluate the feasibility of catalyst regeneration, a more stringent regeneration treatment was performed with the aim of recovering the initial activity of the catalyst ... See full document

... aisladas de ´oxido de molibdeno tetra´edrico m´as complicadas de reducir [9]. En lo que respecta a los termoreductogramas de los precursores catal´ıticos de 9, 12 y 15 por ciento de Zn, en todos se puede observar, ... See full document

... In stability test, the release profile of the spherical agglomeration was almost unchanged as compared with the freshly pre- pared spherical agglomeration stored at 20 °C and 45 % relati[r] ... See full document

... En general, la incorporaci´on de otros cationes diferentes al Ca 2 + [3], inducen una disminuci´on de la estabilidad de la estructura: el efecto des- estabilizador de algunos iones, tales como Mg 2 + , Mn 2 + , Fe ... See full document

... The calculated release ex- ponent pointed out that formulations follow the anomalous type of release mechanism, with a combined phenomena of diffusion and erosion..[r] ... See full document

... % of hydrazine, Sigma Aldrich) in Milli-Q water. The two microemulsions were obtained under vigorous stirring at ambient temperature after mixing the corresponding parts described ...obtain ... See full document

... dispersion of the mixtures, as well as the incorporation of powders in liquids, as a consequence of the wet milling process that continuously occurs in ... See full document

... The PEA polymeric materials used in the current study have good pharmaceutical and biological properties; water is used to prepare PEA polymer microspheres by meltable dispersed emulsifi[r] ... See full document

... In the hydrometallurgical process of Cinc, the precipitation of jarosite particles is employed as means of the elimination of iron, sulfate and alkaline ... See full document

... pH of 2.4 ± 1 and the presence of seeds of á­Al 2 O 3 assisted by surface modifier produced smaller nanoparticles, which were agglomerated in the form of xerogel after ... See full document

... Since the first report on the isolation of graphene, it has become a top area of research in materials ...one the most attractive nanomaterials because of its excellent ... See full document

... 21 of the promotion of tar, as it can be concluded with the fitting of the experimental data by a three-reaction ...continue the work, it has been decided to check ... See full document

... use of modified silica with aliphatic and aromatic amides may be an alternative to improve the retention of low molecular weight ...amount of information regarding the use ... See full document

... forming for talc and serpentine mineral phases, it is rich in ...2 and 4M for increasing the specific area of these ...Then, the base treated mineral was impregnated with ... See full document

... razón de impregnación, hasta un valor de concentración aproximado de 15 mg/L; en este punto las capacidades de adsorción (q ) presentan un comportamiento más irregular. Así para e la muestra P0,50-400, los valores ... See full document

... Effect of tin as a doping substance Taking into account that what it is wanted is to evaluate the presence of tin as metal or as doping substance among a hydrogenation-favorable ... See full document