1. What is Theoretical Air Requirement?

Definition: Theoretical Air Requirement is defined as the minimum amount of air which will allow the complete combustion of the fuel, also referred to as Stoichiometric Air.

Purpose: It helps engineers and chemists determine the exact amount of air needed for complete combustion processes in various industrial applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Air_{Theoretical} \) — Theoretical Air Requirement (Mole)
• \( O_2 Demand \) — Theoretical Oxygen Demand (Mole)
• \( 0.21 \) — Fraction of oxygen in air

Explanation: The oxygen demand is divided by 0.21 (since air contains approximately 21% oxygen) to determine the total air requirement.

3. Importance of Theoretical Air Calculation

Details: Proper air requirement estimation ensures efficient combustion processes, optimal fuel usage, and reduced emissions in industrial applications.

4. Using the Calculator

Tips: Enter the theoretical oxygen demand in moles. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why do we divide by 0.21?
A: Because air contains approximately 21% oxygen by volume, so dividing by 0.21 gives the total air volume needed to supply the required oxygen.

Q2: What units should I use?
A: The calculator uses moles for both input and output, but the same principle applies to other units as long as they're consistent.

Q3: Is this for complete combustion?
A: Yes, this calculates the theoretical minimum air required for complete combustion. Real-world applications often require excess air.

Q4: How do I find the oxygen demand?
A: The oxygen demand is typically calculated based on the stoichiometry of the combustion reaction for your specific fuel.

Q5: Does this account for different air compositions?
A: The 0.21 factor assumes standard air composition. For air with different oxygen content, adjust the denominator accordingly.