Define adsorption isotherm. Give the empirical relationship between the quantity of gas adsorbed by unit mass of solid absorbent and pressure at a particular temperature.
The curve obtained by plotting the amount of gas adsorbed by the adsorbent with pressure at constant temperature is known as adsorption isotherm.
The empirical relationship between the quantity of gas adsorbed by unit mass of solid absorbent and pressure at a particular temperature is given by
x/m = kp1/n