Freundlich Equation Formula:
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Definition: This calculator determines the equilibrium pressure of a gaseous adsorbate using the Freundlich adsorption equation.
Purpose: It helps in understanding adsorption phenomena and designing adsorption systems in chemical engineering and environmental applications.
The calculator uses the Freundlich equation:
Where:
Explanation: The equation relates the amount of gas adsorbed on a solid surface to the equilibrium pressure of the gas.
Details: The Freundlich isotherm is an empirical relationship that describes the adsorption of gas molecules on a solid surface.
Tips: Enter the mass of adsorbate, mass of adsorbent, adsorption constant, and Freundlich constant. All values must be > 0.
Q1: What is the Freundlich adsorption constant?
A: It's an empirical parameter that indicates the adsorption intensity and depends on the adsorbent-adsorbate system.
Q2: What are typical values for the adsorption constant (k)?
A: The value varies widely depending on the system but typically ranges from 0.1 to 10 for many gas-solid systems.
Q3: What does the Freundlich constant (n) represent?
A: It indicates the favorability of adsorption. Values > 1 represent favorable adsorption conditions.
Q4: When is the Freundlich isotherm applicable?
A: It's applicable for heterogeneous surfaces and intermediate pressure ranges.
Q5: What are the limitations of the Freundlich equation?
A: It doesn't reduce to Henry's law at low pressures and doesn't predict a saturation limit at high pressures.