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Definition: This calculator determines the remaining reactant concentration in a mixed flow reactor for a zero-order reaction after a given space time.
Purpose: It helps chemical engineers and researchers predict reactant concentrations in continuous stirred-tank reactors (CSTRs) for zero-order reactions.
The calculator uses the formula:
Where:
Explanation: For zero-order reactions, the reaction rate is independent of reactant concentration. The concentration decreases linearly with time.
Details: Accurate prediction of reactant concentration helps in reactor design, process optimization, and ensuring desired conversion rates.
Tips: Enter the initial concentration, rate constant, and space time. All values must be ≥ 0. The result shows the remaining reactant concentration.
Q1: What is a zero-order reaction?
A: A reaction where the rate is independent of the reactant concentration. The rate is constant and equal to the rate constant (k).
Q2: What is space time in a mixed flow reactor?
A: The time required to process one reactor volume of feed under entrance conditions (τ = V/Q, where V is volume and Q is flow rate).
Q3: What happens if the calculation gives a negative concentration?
A: The calculator shows 0 (complete conversion) as concentration can't be negative. This means the reaction has gone to completion.
Q4: How do I determine the rate constant (k)?
A: It's typically determined experimentally from reaction rate measurements.
Q5: Does this apply to batch reactors?
A: No, this formula is specifically for continuous mixed flow reactors (CSTRs). Batch reactors use different equations.