ENGINEERING – CHEMICAL ENGINEERING CALCULATOR
Stripping Factor
A precise tool.
What is the Stripping Factor & How does it work?
In gas‑liquid absorption (or stripping) the relative ability of the liquid to remove a component from the gas phase is expressed by the **stripping factor**. It compares the actual mass transfer driving force to the capacity of the liquid stream, allowing engineers to size columns and predict stage requirements.
Mathematically the stripping factor (S) is defined as the ratio of the liquid‑to‑gas flow rates multiplied by the ratio of concentration differences in the two phases. A value of (S>1) indicates that the liquid has sufficient capacity to strip the component, while (S<1) suggests the need for additional stages or higher liquid flow.
The most common form used for a binary system is
where (G) and (L) are the gas and liquid molar flow rates, (y_{in}) and (y_{out}) are the inlet and outlet gas mole fractions, and (x_{in}) and (x_{out}) are the inlet and outlet liquid mole fractions of the component of interest.
S = frac{L}{G}frac{y_{in}-y_{out}}{x_{out}-x_{in}}
S = stripping factor
Parameters
Result
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Frequently Asked Questions
What is the formula for calculating the stripping factor?
The stripping factor S is calculated as (L/G) * ((Cg1 – Cg2) / (Cl1 – Cl2)), where L is liquid flow rate, G is gas flow rate, and Cg1, Cg2 are gas concentrations at different stages.
How does a higher stripping factor affect the process?
A higher stripping factor indicates a more efficient mass transfer from the gas phase to the liquid phase, which can reduce the number of stages needed in the absorption column.
When would you use this calculator?
Use this calculator when designing or analyzing gas-liquid absorption processes to determine the stripping factor and optimize the process efficiency.
What does a stripping factor greater than 1 indicate?
A stripping factor greater than 1 indicates that the liquid phase is more effective at removing the component from the gas phase compared to the driving force available.
How do changes in concentration differences affect the stripping factor?
Changes in concentration differences between the gas and liquid phases directly impact the stripping factor, with larger differences generally resulting in a higher stripping factor.
Can the stripping factor be used for both absorption and stripping processes?
Yes, the concept of the stripping factor is applicable to both absorption (removing components from gas to liquid) and stripping (removing components from liquid to gas) processes.
What units should I use for flow rates in this calculation?
Use consistent units for flow rates, such as moles per second or cubic meters per second, and ensure that concentration differences are also in compatible units.
Results are for informational purposes only and do not constitute professional advice.