Mass Transfer Coefficient Formula:
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Definition: This calculator determines the mass transfer coefficient (KL) for batch leaching processes, which quantifies the rate of solute transfer from solid to liquid phase.
Purpose: It helps chemical engineers and process designers optimize leaching operations in industries like mining, metallurgy, and food processing.
The calculator uses the formula:
Where:
Explanation: The formula accounts for solution volume, contact area, time, and concentration differences to determine the mass transfer rate.
Details: The coefficient is crucial for designing efficient leaching systems, predicting extraction rates, and scaling up laboratory results to industrial processes.
Tips: Enter all required parameters in consistent units. Ensure CS > C for valid results. Typical values range from 10-5 to 10-3 mol/s·m².
Q1: What affects the mass transfer coefficient?
A: Factors include temperature, agitation, particle size, solvent properties, and solute characteristics.
Q2: How does this differ from continuous leaching?
A: Batch leaching has finite contact time, while continuous systems operate at steady state with constant feed and product streams.
Q3: What if I get negative values?
A: The coefficient is always positive. Negative results indicate input errors (typically C > CS).
Q4: How to improve leaching efficiency?
A: Increase surface area, optimize temperature, improve mixing, or use more effective solvents.
Q5: What are typical industrial values?
A: For mineral processing, values typically range from 10-4 to 10-3 mol/s·m² depending on the system.