Rate Constant Formula:
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Definition: This calculator determines the rate constant for catalytic reactions considering catalyst deactivation in batch solids and plug flow systems.
Purpose: It helps chemical engineers and researchers analyze reaction kinetics in catalytic systems where catalyst activity changes over time.
The calculator uses the formula:
Where:
Explanation: The formula accounts for both the concentration changes and catalyst deactivation over time.
Details: Accurate rate constant determination is crucial for reactor design, process optimization, and predicting catalyst lifetime.
Tips: Enter all required parameters with appropriate units. Ensure concentrations are positive and time values are non-negative.
Q1: What is space time in catalytic reactions?
A: Space time is the time required to process one reactor volume of feed at specified conditions.
Q2: How does catalyst deactivation affect the rate constant?
A: Deactivation reduces the effective rate constant over time as the catalyst loses activity.
Q3: What units should I use for concentrations?
A: The calculator uses mol/m³, but any consistent concentration units can be used as long as CA0 and CA have the same units.
Q4: Can this be used for gas-phase reactions?
A: Yes, as long as the concentrations are properly expressed in mol/m³.
Q5: What if my catalyst doesn't deactivate?
A: Set the deactivation rate (kd,PF) to zero for systems with stable catalysts.