Heat of Adsorption and Bonding

The differential heat of adsorption q and also the heat of bonding A/zg can be derived from the dependency of the partial pressure p or the relative supersaturation, respectively, as a function of the temperature. The corresponding equations have already been presented in the Sect. 2.1.4  

The integral heat of adsorption q is the amount of heat which is released from a mass unit of an adsorbent when the final loading X, is reached. Let us now assume an adsorbent which is already loaded according to the loading X,. The differential heat of adsorption is equal to the heat released when the loading X, is increased by the small adsorbate mass dX based on the adsorbent mass. These considerations lead to the relationship 

In Table 2.4-2 heats of adsorption of some adsorptives are listed. 

---