1. What is Adsorption Constant if n is equal to 1?

Definition: The adsorption constant (k) represents the equilibrium constant for the adsorption process when the adsorption isotherm follows the condition where n=1.

Purpose: It quantifies the affinity between the adsorbent material and the gas being adsorbed at a specific temperature.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( k \) — Adsorption constant
• \( x_{gas} \) — Mass of gas adsorbed (kg)
• \( m \) — Mass of adsorbent (kg)
• \( P \) — Pressure of gas (Pascal)

Explanation: The formula calculates how much gas is adsorbed per unit mass of adsorbent at a given pressure.

3. Importance of Adsorption Constant

Details: This constant is crucial for designing adsorption systems, predicting adsorption behavior, and comparing different adsorbent materials.

4. Using the Calculator

Tips: Enter the mass of gas adsorbed (kg), mass of adsorbent (kg), and gas pressure (Pa). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does n=1 mean in adsorption?
A: It indicates the adsorption follows a linear isotherm where the amount adsorbed is directly proportional to pressure.

Q2: What are typical units for the adsorption constant?
A: The units depend on the system but are typically kg⁻¹·Pa⁻¹ when using these input units.

Q3: How does temperature affect the adsorption constant?
A: Generally, adsorption decreases with increasing temperature as it's typically an exothermic process.

Q4: What's a typical range for adsorption constants?
A: Values vary widely depending on the gas-adsorbent pair, from 10⁻⁶ to 10⁻¹ kg⁻¹·Pa⁻¹ for many systems.

Q5: When is this formula not applicable?
A: When adsorption doesn't follow a linear isotherm (n≠1), more complex models like Langmuir or Freundlich should be used.