chapter  14
54 Pages

Adsorption

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Adsorption is the phenomenon that selectively segregates atoms or molecules between a fluid and a solid. In some ways, it is like

ab

sorption, except the liquid-phase

ab

sorbent is replaced with a solidphase

ad

sorbent. Sometimes solids could be said to

ab

sorb or

ad

sorb fluids, i.e., the distinction is blurred.* In this chapter, the focus is on selective uptake (and release) by porous solids, especially for process applications. Another subtle distinction occurs when vapor is adsorbed from a gas; it is like condensation, except that the driving force is subtle molecular forces rather than a temperature gradient.