Ion exchange in liquid phase

Dissociative adsorption of HaS seems to be more pronounced on Cd-faujasites prepared with solid state ion-exchange than on samples ion-exchanged in liquid phase. This conclusion is confirmed in Figs. 7a and b. Reverse reaction of hydrosulfurizatlon, i. e. the decomposition of EtSH and EtaS was determined on Cd-faujasites, which provides the highest activity among zeolite catalysts. Relative conversions are in accordance with above findings. Because of limitations of the pulse technique, further evalution of conversion data is rather uncertain. 

Fig. 5. I. r. spectra of Cd-faujasites ion-exchanged in liquid phase (a Cd-X, Cd-Y), in solid state (b NH4X+CdCl2, NH4Y+CdCl2) after standard pretreatment at 450°C curves 1 after pyridine adsorption at 1.1 kPa, 200°C, 10 min., evacuated at 200°C for 30 min. followed by HaS adsorption...

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