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External Reflux Ratio Formula

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The External Reflux Ratio is the ratio of the liquid flowrate from the reflux drum back to the distillation column to the flowrate of distillate taken as product. Check FAQs

R = \frac{L 0}{D}

R - External Reflux Ratio?L₀ - External Reflux Flowrate to Distillation Column?D - Distillate Flowrate from Distillation Column?

External Reflux Ratio Example

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Here is how the External Reflux Ratio equation looks like with Values.

Here is how the External Reflux Ratio equation looks like with Units.

Here is how the External Reflux Ratio equation looks like.

1.5476 = \frac{6.5}{4.2}

1.5476 = \frac{6.5mol/s}{4.2mol/s}

1.5476 = \frac{6.5}{4.2}

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External Reflux Ratio Solution

Follow our step by step solution on how to calculate External Reflux Ratio?

FIRST Step Consider the formula

R = \frac{L 0}{D}

Next Step Substitute values of Variables

∴

R = \frac{6.5mol/s}{4.2mol/s}

Next Step Prepare to Evaluate

∴

R = \frac{6.5}{4.2}

Next Step Evaluate

∴

R = 1.54761904761905

LAST Step Rounding Answer

∴

R = 1.5476

External Reflux Ratio Formula Elements

Variables

External Reflux Ratio

The External Reflux Ratio is the ratio of the liquid flowrate from the reflux drum back to the distillation column to the flowrate of distillate taken as product.

Symbol: R

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find External Reflux Ratio

External Reflux Flowrate to Distillation Column

The External Reflux Flowrate to Distillation Column is the number of moles of condensed top product flowing back into the column as reflux per unit time.

Symbol: L₀

Measurement: Molar Flow RateUnit: mol/s

Note: Value should be greater than 0.

Formulas to find External Reflux Flowrate to Distillation Column

Distillate Flowrate from Distillation Column

The Distillate flowrate from Distillation Column is the amount of moles of condensed top product (distillate) flowing out from the column per unit time.

Symbol: D

Measurement: Molar Flow RateUnit: mol/s

Note: Value should be greater than 0.

Formulas to find Distillate Flowrate from Distillation Column

Other formulas in Continuous Distillation category

Go Boil-Up Ratio

R v = \frac{V}{W}

Go Feed Q-Value in Distillation Column

q = \frac{H v-f}{λ}

Go Internal Reflux Ratio

R Internal = \frac{L}{D}

Go Minimum Number of Distillation Stages by Fenske's Equation

N m = (\frac{\log 10 (\frac{x D \cdot (1 - x W)}{x W \cdot (1 - x D)})}{\log 10 (α avg)}) - 1

How to Evaluate External Reflux Ratio?

External Reflux Ratio evaluator uses External Reflux Ratio = External Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column to evaluate the External Reflux Ratio, The External Reflux Ratio formula is defined as the ratio of liquid fed back to the distillation column from the accumulator to the distillate taken out as a product. External Reflux Ratio is denoted by R symbol.

How to evaluate External Reflux Ratio using this online evaluator? To use this online evaluator for External Reflux Ratio, enter External Reflux Flowrate to Distillation Column (L₀) & Distillate Flowrate from Distillation Column (D) and hit the calculate button.

FAQs on External Reflux Ratio

What is the formula to find External Reflux Ratio?

The formula of External Reflux Ratio is expressed as External Reflux Ratio = External Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column. Here is an example- 1.547619 = 6.5/4.2.

How to calculate External Reflux Ratio?

With External Reflux Flowrate to Distillation Column (L₀) & Distillate Flowrate from Distillation Column (D) we can find External Reflux Ratio using the formula - External Reflux Ratio = External Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column.

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External Reflux Ratio Formula

External Reflux Ratio Example

External Reflux Ratio Solution

External Reflux Ratio Formula Elements

Other formulas in Continuous Distillation category

How to Evaluate External Reflux Ratio?

FAQs on External Reflux Ratio

Variable Name