1. What is Reactant Conversion for Zero Order Reaction in PFR?

Definition: This calculator determines the fraction of reactants converted in a Plug Flow Reactor (PFR) for a zero-order reaction.

Purpose: It helps chemical engineers and researchers predict reaction outcomes and optimize reactor design for zero-order kinetics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( X_{A-PFR} \) — Reactant conversion (dimensionless, between 0 and 1)
• \( k_0 \) — Rate constant for zero-order reaction (mol/m³·s)
• \( \tau_{pfr} \) — Space time in PFR (seconds)
• \( C_{0_{pfr}} \) — Initial reactant concentration (mol/m³)

Explanation: The product of rate constant and space time divided by initial concentration gives the fractional conversion.

3. Importance of Reactant Conversion Calculation

Details: Accurate conversion prediction is crucial for reactor sizing, process optimization, and economic evaluation of chemical processes.

4. Using the Calculator

Tips: Enter the rate constant, space time, and initial concentration. All values must be positive. Conversion is capped at 1 (100%).

5. Frequently Asked Questions (FAQ)

Q1: What is a zero-order reaction?
A: A reaction where the rate is independent of reactant concentration, remaining constant throughout the reaction.

Q2: What is space time in a PFR?
A: The time required to process one reactor volume of feed at entrance conditions (τ = V/Q).

Q3: Can conversion exceed 1 in this calculation?
A: Mathematically yes, but physically no. The calculator caps conversion at 1 (100%).

Q4: When is zero-order kinetics observed?
A: Typically in catalytic reactions where the catalyst is saturated, or in reactions with a limiting component.

Q5: How does PFR differ from CSTR for zero-order reactions?
A: For zero-order reactions, both reactor types give identical conversion for the same space time.