1. What is Mass of Adsorbent using Freundlich Adsorption Isotherm?

Definition: This calculator determines the mass of adsorbent material required based on the Freundlich adsorption isotherm equation.

Purpose: It helps in chemical engineering and environmental science to design adsorption systems for gas purification or separation processes.

2. How Does the Calculator Work?

The calculator uses the Freundlich isotherm formula:

Where:

• \( m \) — Mass of adsorbent (kg)
• \( x_{gas} \) — Mass of gas adsorbed (kg)
• \( k \) — Adsorption constant (dimensionless)
• \( P_{gas} \) — Pressure of gas (Pa)
• \( n \) — Freundlich constant (dimensionless)

Explanation: The formula relates the amount of gas adsorbed to the pressure of the gas and the properties of the adsorbent material.

3. Importance of Freundlich Adsorption Calculation

Details: Accurate calculation helps in designing efficient adsorption systems for applications like air purification, gas separation, and pollution control.

4. Using the Calculator

Tips: Enter the mass of gas adsorbed, adsorption constant (k), gas pressure, and Freundlich constant (n). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the Freundlich adsorption isotherm?
A: It's an empirical relationship between the quantity of gas adsorbed by a unit mass of solid adsorbent and the gas pressure at constant temperature.

Q2: How do I determine the adsorption constant (k)?
A: The constant k is typically determined experimentally for each adsorbent-adsorbate pair at specific temperatures.

Q3: What does the Freundlich constant (n) represent?
A: The constant n indicates the favorability of adsorption. Values > 1 indicate favorable adsorption conditions.

Q4: What units should I use?
A: Use consistent units - kg for mass, Pa for pressure. The constants k and n are dimensionless.

Q5: When is Freundlich isotherm applicable?
A: It's used for heterogeneous surfaces with non-uniform adsorption sites, typically at intermediate pressures.