In contrast to their Brønsted-acidic counterparts, these materials do not, however, exhibit the active-site isolation and homogeneity that has come to be expected of zeolite materials. Instead, they often display a wide variety of active-site ensembles, only some of which may be directly invol...
Experiments with C2H5OD and in situ DRIFT suggest that most of the products come from the hydrocarbon pool type mechanism and dehydration step is not necessary. Thus, our method of direct conversion of ethanol offers a pathway to produce suitable hydrocarbon blend-stock that may be blended at a...
5 with equation (4), where D come from MD and V/Sp are experimentally measured27, the fitted a-values show an exponentially decreasing trend with the defect concentration (see Supplementary Fig. 10). This result suggests that Al defects are not only limited to inner crystals but also ...
On the other hand, 19F resonances in the range between −110 and −115 ppm (not shown) are assigned to F atoms attached to the phenyl ring in the fluorinated SDAs [25,31]; some additional signals at high fields must come from [SiFx(OH)6-x]2- impurity amorphous species or to ...
Very high temperature, Ca-rich alkaline magma intruded an argillite formation at Colle Fabbri, Central Italy, producing cordierite-tridymite metamorphism in the country rocks. An intense Ba-rich sulphate-carbonate-alkaline hydrothermal plume produced a z
The spatial correlation of layers along the b axis was indicated by spots along the b* axis, the diffusion of which might come from the existence of amphiphilic molecules as well as deviation from the superstructure. The single-crystalline mesostructure could be directly observed in high-resolution...
(Selecta Multimatic 9-S, Barcelona, Spain), and adsorption was allowed to come to equilibrium for at least 1 h. This equilibrium step was fundamental because our objective was to isolate the catalytic effect from the zeolite dye adsorption phenomenon, which is always present. This equilibrium ...
The flasks were then immersed in a thermostatic bath at 40 °C (Julabo MP, Seelbach, Germany), which was placed on a multiposition magnetic stirrer (Selecta Multimatic 9-S, Barcelona, Spain), and adsorption was allowed to come to equilibrium for at least 1 h. This equilibrium step was ...
Another important parameter is the size of the internal surface of the adsorbent; the larger it is, the better the adsorbent can come into contact with the adsorbate. In order for the adsorbent to perform well, it is absolutely necessary to have a significant number of active centers on the...
Additional demands for EMD are also likely to come from the use of EMD in hybrid electric vehicles (HEVs). As the environmental impact of traditional cars continues to cause problems in densely populated cities, the increased usage of HEVs to minimize pollution levels seems inevitable [5]. In...