The
Langmuir adsorption model explains
adsorption by assuming an
adsorbate behaves as an ideal gas at
isothermal conditions. At these conditions the
adsorbate's partial pressure,
, is related to the volume of it,
, adsorbed onto a solid
adsorbent. The adsorbent, as indicated in Figure 1, is assumed to be an ideal solid surface composed of series of distinct sites capable of binding the adsorbate. The adsorbate binding is treated as a chemical reaction between the adsorbate molecule
and an empty site,
. This reaction yields an adsorbed complex
with an associated equilibrium constant