# Adsorption Isotherm Equation

The most popular **adsorption isotherms** are the linear, Freundlich and Langmuir equations. Typically these equations are very good at describing experimental data despite their lack of theoretical basis. Their popularity stems in part from their simplicity and from the ease of estimation of their adjustable parameters.

The

The

$\frac{X}{m}$ = $KP^{\frac{1}{n}}$.

The

$\frac{X}{m}$ = $\frac{aP}{1+bP}$.

Where a and b are Langmuir parameters.

**linear adsorption isotherm**equation is,$x = K_dC$.

The

**Freundlich adsorption isotherm**equation is,$\frac{X}{m}$ = $KP^{\frac{1}{n}}$.

Here K and n are parameters depending upon nature of gas and solid.

The

**Langmuir adsorption isotherm**equation is,$\frac{X}{m}$ = $\frac{aP}{1+bP}$.

Where a and b are Langmuir parameters.