Micro steady-state approximation MSSA

The same considerations made before are valid for this case and it is very important to have an available validated reaction mechanism. It can be obtained from three main sources (Blelski et al., 1985 Buxton et al., 1988 Stefan and Bolton, 1998) and it is shown in Table 5. With the available information about the constant k2, k, k, fcg, and k-j, it could be possible to solve a system of four differential equations and extract from the experimental data, the missing constants 4> and k (that in real terms is k /Co2)-This method would provide good information about the kinetic constants, but it is not the best result for studying temperature effects if the same information is not available for the pre-exponential factors and the activation energies. Then, it is better to look for an analytical expression even if it is necessary to make some approximations. This is particularly true in this case, where the direct application of the micro steady-state approximation (MSSA) is more difficult due to the existence of a recombination step that includes the two free radicals formed in the reaction. From the available information, it is possible to know that to calculate the pseudo-steady-state... 

The adsorbed organic substance concentration, / , ds. and the concentration of the association, Ti lOH, can be obtained assuming equilibrium for reactions 3 and 4. If [Ti OH] represents the superficial concentration of bound OH or water that reacts with the holes, we will accept that due to the high water concentration = fcg [Ti" (OH)]. Applying the micro steady state approximation (MSSA) to the [OH ] radicals and calling... 

---

See also in sourсe #XX -- [ ]

---