Formula Used:
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Definition: The rate constant for a second-order reaction in mixed flow quantifies the reaction speed per unit concentration of reactant (raised to power 2) in a continuously stirred tank reactor.
Purpose: This calculation helps chemical engineers design and optimize reactors for second-order reactions in mixed flow conditions.
The calculator uses the formula:
Where:
Explanation: The formula calculates how much reactant is converted per unit time per concentration squared in a mixed flow reactor.
Details: Accurate rate constants are essential for reactor design, process optimization, and predicting reaction behavior under different conditions.
Tips: Enter the initial concentration, current concentration, and space time. All values must be positive numbers.
Q1: What is space time in a mixed flow reactor?
A: Space time is the time required to process one reactor volume of feed under entrance conditions.
Q2: How does mixed flow differ from plug flow?
A: Mixed flow reactors have complete backmixing (uniform composition), while plug flow has no mixing (composition varies along reactor length).
Q3: What are typical units for second-order rate constants?
A: For second-order reactions, rate constants typically have units of m³/(mol·s) or L/(mol·s).
Q4: When is this calculation most applicable?
A: This is specifically for second-order reactions in continuously stirred tank reactors (CSTRs).
Q5: How does temperature affect the rate constant?
A: Rate constants typically increase with temperature according to the Arrhenius equation.