Question

-T, Uptake (cm3 /gram) P (mm HG) T2 0.059 0.17 0.318 0.95 T2> T, 1.638 5.57 3.613 12.09 Concentration in fluid 24.236 111.32 220.87 34.278 Example: Based on the data from the table, determine if the Langmuir equation accurately represents the adsorption mechanism. Also determine the adsorbent surface area. 300.05 38.340 401.25 41.779 500.18 44.037 602.74 45.693 Concentration on solid

Answer 1

If we plot a graph between pressure and volume adsorbed, the graph agrees with the langmuir adsorption isotherm.

S= Vmono mono

Where S is the surface area of the adsorbent.

V_mono is the amount of adsorbate covering the surface area of the adsorbent in a monomolecular coverage,

W_mono is the surface occupied by a molecule and N is the avagadro's number.

S is the surface area of the adsorbent.

If we plat a graph between P/V vs P then the slope of the graph will give us the value of  . We can use this value to calculate the surface area of the adsorbent.

V mono