Feed Q-Value in Distillation Column Calculator

✖The heat required to convert feed to saturated vapor is the enthalpy difference between the saturated vapor enthalpy of the feed and feed enthalpy at inlet.ⓘ Heat Required to Convert Feed to Saturated Vapor [H_v-f]			+10% -10%
✖The Molal Latent Heat of Vaporization of saturated liquid is the difference in enthalpy of saturated vapor and saturated liquid of the feed.ⓘ Molal Latent Heat of Vaporization of Saturated Liq [λ]			+10% -10%

✖The Q-value in Mass Transfer is defined as the moles of liquid flow in the stripping section that results from the introduction of each mole of feed.ⓘ Feed Q-Value in Distillation Column [q]

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Formula

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Feed Q-Value in Distillation Column

Formula

`"q" = "H"_{"v-f"}/"λ"`

Example

`"0.606061"="1000J/mol"/"1650J/mol"`

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Feed Q-Value in Distillation Column Solution

STEP 0: Pre-Calculation Summary

Formula Used

Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq
q = H_v-f/λ
This formula uses 3 Variables

Variables Used

Q-value in Mass Transfer - The Q-value in Mass Transfer is defined as the moles of liquid flow in the stripping section that results from the introduction of each mole of feed.
Heat Required to Convert Feed to Saturated Vapor - (Measured in Joule Per Mole) - The heat required to convert feed to saturated vapor is the enthalpy difference between the saturated vapor enthalpy of the feed and feed enthalpy at inlet.
Molal Latent Heat of Vaporization of Saturated Liq - (Measured in Joule Per Mole) - The Molal Latent Heat of Vaporization of saturated liquid is the difference in enthalpy of saturated vapor and saturated liquid of the feed.

STEP 1: Convert Input(s) to Base Unit

Heat Required to Convert Feed to Saturated Vapor: 1000 Joule Per Mole --> 1000 Joule Per Mole No Conversion Required
Molal Latent Heat of Vaporization of Saturated Liq: 1650 Joule Per Mole --> 1650 Joule Per Mole No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

q = H_v-f/λ --> 1000/1650

Evaluating ... ...

q = 0.606060606060606

STEP 3: Convert Result to Output's Unit

0.606060606060606 --> No Conversion Required

FINAL ANSWER

0.606060606060606 ≈ 0.606061 <-- Q-value in Mass Transfer

(Calculation completed in 00.004 seconds)

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Created by Vaibhav Mishra

DJ Sanghvi College of Engineering (DJSCE), Mumbai

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< 13 Continuous Distillation Calculators

Minimum Number of Distillation Stages by Fenske's Equation

Go Minimum Number of Stages = ((log10((Mole Fraction of More Volatile Comp in Distillate*(1-Mole Fraction of More Volatile Comp in Residue))/(Mole Fraction of More Volatile Comp in Residue*(1-Mole Fraction of More Volatile Comp in Distillate))))/(log10(Average Relative Volatility)))-1

Murphree Efficiency of Distillation Column Based on Vapour Phase

Go Murphree Efficiency of Distillation Column = ((Average Mole Fraction of Vapour on Nth Plate-Average Mole Fraction of Vapour at N+1 Plate)/(Average Mole Fraction at Equilibrium on Nth Plate-Average Mole Fraction of Vapour at N+1 Plate))*100

Feed Q-Value in Distillation Column

Go Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq

Internal Liquid Reflux Flowrate based on Internal Reflux Ratio

Go Internal Reflux Flowrate to Distillation Column = Internal Reflux Ratio*Distillate Flowrate from Distillation Column

Liquid Reflux Flowrate based on External Reflux Ratio

Go External Reflux Flowrate to Distillation Column = External Reflux Ratio*Distillate Flowrate from Distillation Column

Distillate Flowrate based on External Reflux Ratio

Go Distillate Flowrate from Distillation Column = External Reflux Flowrate to Distillation Column/External Reflux Ratio

Distillate Flowrate based on Internal Reflux Ratio

Go Distillate Flowrate from Distillation Column = Internal Reflux Flowrate to Distillation Column/Internal Reflux Ratio

External Reflux Ratio

Go External Reflux Ratio = External Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column

Internal Reflux Ratio

Go Internal Reflux Ratio = Internal Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column

Bottom Product based on Boil-up Ratio

Go Residue Flowrate from Distillation Column = Boil-Up Flowrate to the Distillation Column/Boil-Up Ratio

Vapor Reflux based on Boil-Up Ratio

Go Boil-Up Flowrate to the Distillation Column = Boil-Up Ratio*Residue Flowrate from Distillation Column

Boil-Up Ratio

Go Boil-Up Ratio = Boil-Up Flowrate to the Distillation Column/Residue Flowrate from Distillation Column

Overall Efficiency of Distillation Column

Go Overall Efficiency of Distillation Column = (Ideal Number of Plates/Actual Number of Plates)*100

< 20 Important Formulas in Distillation Mass Transfer Operation Calculators

Total Steam Required to Vaporize Volatile Component

Go Total Steam Required to Vaporize Volatile Comp = (((Total Pressure of System/(Vaporizing Efficiency*Vapor Pressure of Volatile Component))-1)*(Initial Moles of Volatile Component-Final Moles of Volatile Component))+((Total Pressure of System*Moles of Non-Volatile Component/(Vaporizing Efficiency*Vapor Pressure of Volatile Component))*ln(Initial Moles of Volatile Component/Final Moles of Volatile Component))

Moles of Volatile component Volatilized from mixture of Non-Volatiles by Steam

Go Moles of Volatile Component = Moles of Steam*((Vaporizing Efficiency*Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component)/(Total Pressure of System-Vaporizing Efficiency*Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component))

Minimum Number of Distillation Stages by Fenske's Equation

Mole Fraction of MVC in Feed from Overall and Component Material Balance in Distillation

Go Mole Fraction of More Volatile Component in Feed = (Distillate Flowrate*Mole Fraction of More Volatile Comp in Distillate+Residue Flowrate from Distillation Column*Mole Fraction of More Volatile Comp in Residue)/(Distillate Flowrate+Residue Flowrate from Distillation Column)

Moles of Volatile component Volatilized from mixture of Non-Volatiles by Steam at Equilibrium

Go Moles of Volatile Component = Moles of Steam*(Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component/(Total Pressure of System-Mole Fraction of Volatile Comp in Non-Volatiles*Vapor Pressure of Volatile Component))

Moles of Volatile component Volatilized by Steam with Trace amounts of Non-Volatiles

Go Moles of Volatile Component = Moles of Steam*((Vaporizing Efficiency*Vapor Pressure of Volatile Component)/(Total Pressure of System-(Vaporizing Efficiency*Vapor Pressure of Volatile Component)))

Murphree Efficiency of Distillation Column Based on Vapour Phase

Relative Volatility using Mole Fraction

Go Relative Volatility = (Mole Fraction of Component in Vapor Phase/(1-Mole Fraction of Component in Vapor Phase))/(Mole Fraction of Component in Liquid Phase/(1-Mole Fraction of Component in Liquid Phase))

Total Pressure using Mole Fraction and Saturated Pressure

Go Total Pressure of Gas = (Mole Fraction of MVC in Liq Phase*Partial Pressure of More Volatile Component)+((1-Mole Fraction of MVC in Liq Phase)*Partial Pressure of Less Volatile Component)

Moles of Volatile component Volatilized by Steam with Trace amounts of Non-Volatiles at Equilibrium

Go Moles of Volatile Component = Moles of Steam*(Vapor Pressure of Volatile Component/(Total Pressure of System-Vapor Pressure of Volatile Component))

Feed Q-Value in Distillation Column

Go Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq

Relative Volatility using Vapour Pressure

Go Relative Volatility = Saturated Vapour Pressure of More Volatile Comp/Saturated Vapour Pressure of Less Volatile Comp

External Reflux Ratio

Go External Reflux Ratio = External Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column

Internal Reflux Ratio

Go Internal Reflux Ratio = Internal Reflux Flowrate to Distillation Column/Distillate Flowrate from Distillation Column

Equilibrium Vaporization Ratio for Less Volatile Component

Go Equilibrium Vaporization Ratio of LVC = Mole Fraction of LVC in Vapor Phase/Mole Fraction of LVC in Liquid Phase

Equilibrium Vaporization Ratio for More Volatile Component

Go Equilibrium Vaporization Ratio of MVC = Mole Fraction of MVC in Vapor Phase/Mole Fraction of MVC in Liquid Phase

Boil-Up Ratio

Go Boil-Up Ratio = Boil-Up Flowrate to the Distillation Column/Residue Flowrate from Distillation Column

Total Feed Flowrate of Distillation Column from Overall Material Balance

Go Feed Flowrate to Distillation Column = Distillate Flowrate+Residue Flowrate from Distillation Column

Relative Volatility using Equilibrium Vaporization Ratio

Go Relative Volatility = Equilibrium Vaporization Ratio of MVC/Equilibrium Vaporization Ratio of LVC

Overall Efficiency of Distillation Column

Go Overall Efficiency of Distillation Column = (Ideal Number of Plates/Actual Number of Plates)*100

Feed Q-Value in Distillation Column Formula

Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq
q = H_v-f/λ

What is Q-Value in Distillation?

Te q-value is defined as the moles of liquid flow in the stripping section that results from the introduction of each mole of feed.

The value of q can be controlled by adjusting the amount of preheat the feed stream is subjected to before entering the column.

For different feed conditions, q has the following numerical limits :

· cold feed (below bubble point) q > 1
· feed at bubble point (saturated liquid) q = 1
· feed partially vapour 0 < q < 1
· feed at dew point (saturated vapour) q = 0
· feed superheated vapour q < 0

If the feed is a mixture of liquid and vapour, then q is the fraction of the feed that is liquid. For example, if a feed is 25% liquid and 75% vapour, then q = 0.25.

How to Calculate Feed Q-Value in Distillation Column?

Feed Q-Value in Distillation Column calculator uses Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq to calculate the Q-value in Mass Transfer, The Feed Q-Value in Distillation Column formula is defined as the ratio of the heat required to convert feed to saturated vapour to the molal latent heat of vaporization of saturated liquid. Q-value in Mass Transfer is denoted by q symbol.

How to calculate Feed Q-Value in Distillation Column using this online calculator? To use this online calculator for Feed Q-Value in Distillation Column, enter Heat Required to Convert Feed to Saturated Vapor (H_v-f) & Molal Latent Heat of Vaporization of Saturated Liq (λ) and hit the calculate button. Here is how the Feed Q-Value in Distillation Column calculation can be explained with given input values -> 0.606061 = 1000/1650.

FAQ

What is Feed Q-Value in Distillation Column?

The Feed Q-Value in Distillation Column formula is defined as the ratio of the heat required to convert feed to saturated vapour to the molal latent heat of vaporization of saturated liquid and is represented as q = H_v-f/λ or Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq. The heat required to convert feed to saturated vapor is the enthalpy difference between the saturated vapor enthalpy of the feed and feed enthalpy at inlet & The Molal Latent Heat of Vaporization of saturated liquid is the difference in enthalpy of saturated vapor and saturated liquid of the feed.

How to calculate Feed Q-Value in Distillation Column?

The Feed Q-Value in Distillation Column formula is defined as the ratio of the heat required to convert feed to saturated vapour to the molal latent heat of vaporization of saturated liquid is calculated using Q-value in Mass Transfer = Heat Required to Convert Feed to Saturated Vapor/Molal Latent Heat of Vaporization of Saturated Liq. To calculate Feed Q-Value in Distillation Column, you need Heat Required to Convert Feed to Saturated Vapor (H_v-f) & Molal Latent Heat of Vaporization of Saturated Liq (λ). With our tool, you need to enter the respective value for Heat Required to Convert Feed to Saturated Vapor & Molal Latent Heat of Vaporization of Saturated Liq and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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