Based on theoretical considerations, Fuget (Ref 1) concludes that fuel/air mists with fuel droplets of less than 940 microns should behave as essentially homogeneous gas phase detonations. More recent computational studies by Gubin et al (Ref 14) indicate a much smaller droplet size (ca 10 microns) is necessary to attain [Pg.150]

Docherty, G., Jones, V. and Evershed, R. P. (2001) Practical and theoretical considerations in the gas chromatography/combustion/isotope ratio mass spectrometry 813C analysis of small polyfunctional compounds. Rapid Communications in Mass Spectrometry 15, 730 738. [Pg.426]

Hatta, S. Tech. Repts. Tohoku Imp. Univ. 10 (1932) 119. On the absorption velocity of gases by liquids. II. Theoretical considerations of gas absorption due to chemical reaction. [Pg.716]

Theoretical Formulation of the Separative Efficiency. The separative efficiency E of a countercurrent gas centrifuge maybe considered to be the product of four factors, all but one of which can be evaluated on the basis of theoretical considerations. In this formulation the separative efficiency is defined by [Pg.94]

Theoretical considerations show that the free energy of dissociation of an acid in water, and hence the dissociation constant, is governed by the algebraic sum of the free energies for the solution of the undissociated acid in water, for vaporisation of the acid, for the formation of a free proton and an anion from the molecule of acid in the gas phase, and for hydration of the proton and anion. Thus the true acidity, given by the third of these [Pg.88]

The concept that a gas comprises a large number of distinct particles between which - aside from the collisions - there are no effective forces, has led to a number of theoretical considerations which we summarize today under the designation kinetic theory of gases". [Pg.12]

Since this book is primarily concerned with condensed-phase studies, we do not go into the details of gas-phase radiation chemistry. We will briefly outline some important mechanisms of gas-phase reactions, followed by a presentation of some specific examples and certain theoretical considerations. In Chapter 4, we considered ionization and excitation in some detail. Many of these considerations apply to the gas phase these will not be repeated. We stress that the measurement of the W value is of utmost importance in the [Pg.121]

The Van Deemter equation can be applied to gas chromatography with a different emphasis on the relative importance of its terms. In fact, the interactions between an analyte and a stationary phase are much simpler in gas chromatography than those in liquid chromatography since the mobile phase does not modify the stationary phase in any way. The theoretical considerations are different for packed GC columns vs open tubular capillary columns. [Pg.200]

Closure of such differential equations requires the definitions of both constitutive relations for hydrodynamical functions and also kinetic relations for the chemistry. These functions are specified by recourse both to theoretical considerations and to rheological measurements of fluidization. We introduce the ideal gas approximation to specify the gas phase pressure and a caloric equation-of-state to relate the gas phase internal energy to both the temperature and the gas phase composition. It is assumed that the gas and solid phases are in local thermodynamic equilibrium so that they have the same local temperature. [Pg.161]

However, as discussed extensively in review articles by Pouget [9] and by Barisic and Bjelis [10], the presence of both 2kF and 4kF anomalies, where kF is the Fermi wave vector of the quasi-one-dimensional electron gas, the fact that phonon softening at 2kF is relatively small, combined with theoretical considerations, have lead to the present-day viewpoint that electron-electron Coulomb interactions play an important role. [Pg.365]

Numerous representations have been used to describe the isotherms in Figure 5.5. Some representations, such as the Van der Waals equation, are semi-empirical, with the form suggested by theoretical considerations, whereas others, like the virial equation, are simply empirical power series expansions. Whatever the description, a good measure of the deviation from ideality is given by the value of the compressibility factor, Z= PV /iRT), which equals 1 for an ideal gas. [Pg.94]

The new pressure loss equation presented here is based on determining two parameters the velocity difference between gas and conveyed material and the falling velocity of the material. The advantage of this method is that no additional pressure loss coefficient is needed. The two parameters are physically clear and they are quite easily modeled for different cases by theoretical considerations, which makes the method reliable and applicable to various ap>-plications. The new calculation method presented here can be applied to cases where solids are conveyed in an apparently uniform suspension in a so-called lean or dilute-phase flow. [Pg.1356]

In conclusion of this short account on experiments, which is clearly far from complete, detailed structural data for solutions will be available in the near future. They may serve well to support theoretical calculations of solvation processes and to present challenges for theoretical considerations, which will in any case have to be dynamic ones. Data which may be compared quantitatively with molecular calculations will, however, have to come from gas-phase solvation experiments. There already exists a great variety of according data and their number will certainly increase further. [Pg.50]

In solution the barriers to conformational change are often small, even when the molecule has a built-in restriction on motion. Conformational barriers calculated for isolated molecules in the gas phase that reveal the nature of some of these barriers are likely to be good reflections of the real barriers in solvents such as chloroform. There usually are many conformations present at any time in such solutions and they are in equilibrium. The equilibria are likely to be much more restricted in polar media. It is very important for us to discover the extent of the equilibrium, that is, the number of conformations involved, the relative proportion of each, and the rate of transformation between them. Such a task is virtually impossible from theoretical considerations, and two major approaches using physical techniques, mainly nmr, are possible. These have been discussed in some detail for small molecules and can be summarized as follows. [Pg.67]

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