1. What is Equilibrium Pressure of Gaseous Adsorbate?

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.

2. How Does the Calculator Work?

The calculator uses the Freundlich equation:

Where:

• \( p \) — Equilibrium pressure of the gaseous adsorbate
• \( M \) — Mass of adsorbate (kg)
• \( m \) — Mass of adsorbent (kg)
• \( k \) — Adsorption constant
• \( n \) — Freundlich adsorption constant

Explanation: The equation relates the amount of gas adsorbed on a solid surface to the equilibrium pressure of the gas.

3. Importance of Freundlich Equation

Details: The Freundlich isotherm is an empirical relationship that describes the adsorption of gas molecules on a solid surface.

4. Using the Calculator

Tips: Enter the mass of adsorbate, mass of adsorbent, adsorption constant, and Freundlich constant. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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.