Congruence temperature

Temperature congruence for the double layer on rutile in the presence of the indicated concentrations of KN03. Between 5 and 50° C all data coincide within the band width. 

The subtraction curve in Fig. 3A (solid) is compared with that obtained by ramping the same column load twice with no probe, and then a third time after injecting the basic probe (dotted curve, Fig. 3B). The near congruence of the curves resulting from the first and third ramps demonstrates that acidic sites are part of the glass structure (silanols and silicates) and are not susceptible to desorption in this temperature range. 

Of a slightly different nature is the temperature congruence test, which virtually is a test for ideality. Very generally, adsorption isotherms can be written as some function of x = x. 6 =... 

Temperature congruence is particularly used for individual isotherms. 

Figure 3.81. Congruence analysis for the electrosorption of tetrabutylammonlum nitrate on silver iodide. Electrolyte, 10" M KNO,. temperature 20°C. Specific surface area of the sample 0.92 m g" (reference as fig. 3.80).

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