Oxidative dehydrogenation of n-butane on V/MgO catalysts—kinetic study in anaerobic conditions

Modeling of fluidized bed reactors with two reaction zones

“…Although some attempts to correlate f w with d b have been published, 22,23 the large dispersion in the experimental values makes it difficult to predict this parameter with precision. However, a previous parametric study 24 showed that the variation of f w between 0.05 and 0.15 only results in small changes (less than one percentage point) in the conversion or selectivity values predicted by the model.…”

Oxidative dehydrogenation of butane in an interconnected fluidized‐bed reactor

“…This kinetic model was previously developed (Rubio et al, 2003) specifically for use with reactors where the oxidation degree of the catalyst changes. The reactions considered in the model are summarized in Table 2.…”

“…(2) An improved kinetic model (Rubio et al, 2003) is incorporated. This kinetic model has been developed to account for the changes in selectivity that appear when the oxidation degree of the catalyst changes (as happens with the catalyst particles in an ICFBR).…”

“…The mathematical model for this kind of reactor should include a kinetic model of the reaction, able to consider the changes in the oxidation degree of the catalyst, and also fluid dynamic models for the oxygen and the solid. A kinetic model, developed to account for this change, in the ODH of butane, has been presented elsewhere (Rubio et al, 2003) and will be used in this model. The model for solid flow in the reactor will be modeled following previous experimental works, and its suitability will be checked in a cold model.…”

Role of volume versus defects in the electrical resistivity of lattice-distorted V(001) ultrathin films

“…Subtle modifications of the physical properties of these systems are achieved by tiny changes of the structure that, for example, can be induced by adsorption or insertion of doping elements such as H. Vanadium, which is known to act as a strong hydrogen getter, [1][2][3][4] is the natural prototype element to study the effects of introducing H in very thin structures and nanoparticles. Furthermore, these systems are attracting attention for the design of new materials for information storage and hydrogen storage for energetic applications.…”