1. What is Mass of Gas Adsorbed in Langmuir Adsorption?

Definition: This calculator determines the mass of gas adsorbed onto a solid surface according to the Langmuir adsorption model.

Purpose: It helps chemists and chemical engineers quantify gas adsorption for applications like catalysis, gas purification, and surface chemistry studies.

2. How Does the Calculator Work?

The calculator uses the Langmuir adsorption isotherm formula:

Where:

• \( x_{gas} \) — Mass of gas adsorbed (grams)
• \( m_L \) — Mass of adsorbent (grams)
• \( k \) — Adsorption constant (depends on adsorbent-gas pair)
• \( P_{gas} \) — Pressure of gas (atm)

Explanation: The formula describes monolayer adsorption where the adsorption rate equals the desorption rate at equilibrium.

3. Importance of Langmuir Adsorption Calculation

Details: Accurate adsorption calculations are crucial for designing adsorption systems, understanding surface interactions, and optimizing industrial processes.

4. Using the Calculator

Tips: Enter the mass of adsorbent in grams, the adsorption constant (typically determined experimentally), and gas pressure in atm. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the adsorption constant (k)?
A: The adsorption constant represents the affinity between the gas and adsorbent. Higher values indicate stronger adsorption.

Q2: What are typical units for the adsorption constant?
A: The adsorption constant typically has units of atm^-1 when pressure is in atm.

Q3: What assumptions does the Langmuir model make?
A: It assumes monolayer adsorption, uniform adsorption sites, and no interactions between adsorbed molecules.

Q4: How do I determine the adsorption constant experimentally?
A: It's typically found by measuring adsorption at different pressures and fitting the data to the Langmuir isotherm.

Q5: Can this calculator be used for liquid-phase adsorption?
A: The Langmuir model can be adapted for liquids, but you would need to replace pressure with concentration.