Understanding Substrate Conversion
Substrate conversion shows how much reactant disappears during a reaction. It is a central check in chemical, biological, and environmental work. A high value usually means strong substrate use. A low value may show weak activity, poor mixing, short contact time, or wrong operating conditions. This calculator supports batch tests and continuous flow runs. It also converts common concentration and flow units before solving.
Why Conversion Matters
Conversion links raw measurements to process performance. It helps compare catalysts, enzymes, reactors, and operating recipes. In a batch test, conversion uses the initial substrate and final substrate. In a flow reactor, it uses inlet load and outlet load. Load means molar flow. That makes the method fair when inlet and outlet flow rates differ. The tool also estimates consumed substrate, unconverted fraction, and reaction rate. These values help when scaling a study from bench work to pilot equipment.
Using Advanced Options
Enter concentrations in molar or mass units. Add molecular weight when using mass units. Select a flow unit and a reactor volume unit. The page normalizes values to mol per liter and liters per hour. Optional product and byproduct fields estimate yield and selectivity. The stoichiometric coefficient lets you adjust the theoretical product amount. This is useful when one mole of substrate creates more than one mole of product.
Reading The Results
The conversion percentage is the main result. The remaining percentage shows substrate still leaving the system. The consumed amount shows useful substrate loss per hour or per batch. Rate divides consumed substrate by reactor volume. Yield compares product formed with theoretical product. Selectivity compares product with total measured product side streams. Export the result as CSV or PDF for records.
Practical Notes
Always check units before entering data. Use the same basis for inlet and outlet measurements. Avoid mixing wet weight and dry weight values. For noisy data, calculate several trials and compare averages. A negative conversion usually means measurement error, dilution, feed mismatch, or substrate formation inside the system. Record the sampling time, temperature, pressure, and pH beside each run. Small condition changes can shift kinetics. Keep raw measurements with exported files. This makes audits easier and supports later troubleshooting during process review meetings later.