Binary exchange kinetics

Quantification and Elucidation of Rate-Limiting Steps 109 Chemical Reaction and Diffusion 112 Rates of Ion Exchange on Soils and Soil Constituents 113 Mineralogical Composition 114 Ion Charge and Radius 116 Binary Cation and Anion Exchange Kinetics 117... 

TABLE 5.5 Published Studies on Binary Cation and Anion Exchange Kinetics on Soils and Inorganic Soil Constituents... 

Bajpai, R.K., A.K. Gupta, and M. Gopala-Rao, 1974. Single particle studies of binary and ternary cation exchange kinetics. AIChE J. 20 989-995. 

Two points should be noted from Eq. (12). First, the magnitude of Dab depends strongly on the composition of the exchanger not only because it is a direct function of ionic concentrations, but also because it is a function of both and D b, which we have already noted vary with exchanger composition [45]. Secondly, Dab is a function of the non-ideaUty of the zeolite [data for which can be obtained, as we saw earUer, from the activity coefficients described in Eq. (10)]. One may expect therefore that to describe adequately the kinetic behaviour of even a binary exchange process in a molecular sieve would be a very compHcat-ed task. 

Fig. 11. Examples of ternary ion exchange kinetic measurements within the Na/Ca/Mg-A system. The dashed lines which bound the experimental data represent the simple binary exchange rates (viz, Na/Ca and Na/Mg). When magnesium is added to the system in progressively larger amounts (i. e. O > ) a progressive slowing of the Na exchange rate is seen. Taken with permission from [21]...

Here, we present a formulation suitable for reversible binding of a Ugand and a protein to form a binary complex. The two-state kinetic model involves the interacting molecular species L and P under equilibrium conditions, exchanging between their respective free states and the bound state L P according to Scheme 1. 

McKee (21, 195) and McKee and Norton (219, 249, 250) have reported compensation effects in the exchange reactions of methane on several pairs of binary noble metal alloy catalysts. For each combination of elements kinetic measurements were made at a number of different compositions. Although the compensation behavior was generally very similar, there were perceptible differences in the values of B and e calculated for the various alloy combinations. The parameters found, by use of the formulas given in Appendix II, are summarized in Table IV, A-E, and are subject to the following comments. In consideration of data for the Pd-Rh alloys, the point for... 

Smith, T. G., and Dranoff, J. S. (1964). Film diffusion-controlled kinetics in binary ion exchange. Ind. Eng. Chem. Fundam. 3, 195-200. 

The results in Problem 4 of Chapter 4 imply that a kinetics analysis of the ion exchange reaction in Eq. 5.6 for binary, homovalent exchange leads to the adsorption isotherm equation ... 

The kinetics of halogen exchange in binary mixtures of trimethyltin halides in solution have been investigated by total lineshape analysis. By measurements in solvents of different permittivities it was concluded that ionization does play a part in the kinetics, and that exchange proceeds by a five-co-ordinated intermediate according to Scheme 7. 

Coenzyme dissociation is rate limiting for both enzymes [341,4 3). Furthermore, no kinetic evidence has been obtained for an isomerization of the binary YADH-NADH complex, in contrast to the corresponding LADH complex 303). Hydrogen-deuterium exchange studies (464), however, indicate a conformational change upon coenzyme binding. 

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