1. What is Initial Reactant Concentration for First Order Reaction?

Definition: This calculator determines the initial concentration of reactant in a first-order chemical reaction based on space time, molar feed rate, and reactor volume.

Purpose: It helps chemical engineers and researchers determine the starting concentration of reactants in continuous flow reactors.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C_o \) — Initial reactant concentration (mol/m³)
• \( \tau_i \) — Space time for vessel i (seconds)
• \( F_0 \) — Molar feed rate (mol/second)
• \( V_i \) — Volume of reactor vessel i (m³)

Explanation: The space time multiplied by molar feed rate gives the total moles in the system, which when divided by volume gives concentration.

3. Importance of Initial Concentration Calculation

Details: Accurate initial concentration is crucial for reaction kinetics studies, reactor design, and predicting reaction outcomes.

4. Using the Calculator

Tips: Enter the space time in seconds, molar feed rate in mol/s, and reactor volume in m³. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is space time in chemical reactors?
A: Space time is the time required to process one reactor volume of feed at specified conditions.

Q2: How is molar feed rate determined?
A: Molar feed rate is calculated from the volumetric flow rate and concentration of the feed stream.

Q3: Does this work for batch reactors?
A: No, this formula is specifically for continuous flow reactors. Batch reactors have different calculations.

Q4: What affects initial reactant concentration?
A: Feed composition, flow rate, reactor volume, and reaction conditions all influence initial concentration.

Q5: How does this relate to reaction kinetics?
A: Initial concentration is crucial for determining reaction rates in first-order kinetics where rate = k[Co].