Number of Transfer Units for Dilute System in Packed Column Calculator

✖Solute Gas Mole Fraction represents the mole fraction of the solute gas in the bottom of the column.ⓘ Solute Gas Mole Fraction [y₁]			+10% -10%
✖Solute Gas Mole Fraction at Top represents the mole fraction of the solute gas in the top most section of column.ⓘ Solute Gas Mole Fraction at Top [y₂]			+10% -10%
✖Log Mean Driving Force represents the effective driving force for mass transfer in these processes.ⓘ Log Mean Driving Force [Δy_lm]			+10% -10%

✖Number of Transfer Units-Nog is a dimensionless parameter used to quantify the effectiveness of mass transfer in processes like absorption and distillation.ⓘ Number of Transfer Units for Dilute System in Packed Column [N_og]

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Formula

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Number of Transfer Units for Dilute System in Packed Column

Formula

`"N"_{"og"} = ("y"_{"1"}-"y"_{"2"})/("Δy"_{"lm"})`

Example

`"2"=("0.64"-"0.32")/("0.16")`

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Number of Transfer Units for Dilute System in Packed Column Solution

STEP 0: Pre-Calculation Summary

Formula Used

Number Of Transfer Units-Nog = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(Log Mean Driving Force)
N_og = (y₁-y₂)/(Δy_lm)
This formula uses 4 Variables

Variables Used

Number Of Transfer Units-Nog - Number of Transfer Units-Nog is a dimensionless parameter used to quantify the effectiveness of mass transfer in processes like absorption and distillation.
Solute Gas Mole Fraction - Solute Gas Mole Fraction represents the mole fraction of the solute gas in the bottom of the column.
Solute Gas Mole Fraction at Top - Solute Gas Mole Fraction at Top represents the mole fraction of the solute gas in the top most section of column.
Log Mean Driving Force - Log Mean Driving Force represents the effective driving force for mass transfer in these processes.

STEP 1: Convert Input(s) to Base Unit

Solute Gas Mole Fraction: 0.64 --> No Conversion Required
Solute Gas Mole Fraction at Top: 0.32 --> No Conversion Required
Log Mean Driving Force: 0.16 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

N_og = (y₁-y₂)/(Δy_lm) --> (0.64-0.32)/(0.16)

Evaluating ... ...

N_og = 2

STEP 3: Convert Result to Output's Unit

2 --> No Conversion Required

FINAL ANSWER

2 <-- Number Of Transfer Units-Nog

(Calculation completed in 00.004 seconds)

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Created by Rishi Vadodaria

Malviya National Institute Of Technology (MNIT JAIPUR ), JAIPUR

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< 16 Packed Column Designing Calculators

Effective Interfacial Area of Packing using Onda's Method

Go Effective Interfacial Area = Interfacial Area per Volume*(1-exp((-1.45*((Critical Surface Tension/Liquid Surface Tension)^0.75)*(Liquid Mass Flux/(Interfacial Area per Volume*Fluid Viscosity in Packed Column))^0.1)*(((Liquid Mass Flux)^2*Interfacial Area per Volume)/((Liquid Density)^2*[g]))^-0.05)*(Liquid Mass Flux^2/(Liquid Density*Interfacial Area per Volume*Liquid Surface Tension))^0.2)

Liquid Mass Film Coefficient in Packed Columns

Go Liquid Phase Mass Transfer Coefficient = 0.0051*((Liquid Mass Flux*Packing Volume/(Effective Interfacial Area*Fluid Viscosity in Packed Column))^(2/3))*((Fluid Viscosity in Packed Column/(Liquid Density*Column Diameter of Packed Column))^(-1/2))*((Interfacial Area per Volume*Packing Size/Packing Volume)^0.4)*((Fluid Viscosity in Packed Column*[g])/Liquid Density)^(1/3)

Log Mean Driving Force Based on Mole Fraction

Go Log Mean Driving Force = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(ln((Solute Gas Mole Fraction-Gas Concentration at Equilibrium)/(Solute Gas Mole Fraction at Top-Gas Concentration at Equilibrium)))

Pressure Drop Correlation given Vapor Mass Flux and Packing Factor

Go Pressure Drop Correlation Factor = (13.1*((Gas Mass Flux)^2)*Packing Factor*((Fluid Viscosity in Packed Column/Liquid Density)^0.1))/((Vapor Density in Packed Column)*(Liquid Density-Vapor Density in Packed Column))

Interfacial Area given Height of Transfer Unit and Mass Transfer Coefficient

Go Interfacial Area per Volume = (Molar Gas Flowrate)/(Height of Transfer Unit*Overall Gas Phase Mass Transfer Coefficient*Total Pressure)

Overall Gas Mass Transfer Coefficient given Height of Transfer Unit

Go Overall Gas Phase Mass Transfer Coefficient = (Molar Gas Flowrate)/(Height of Transfer Unit*Interfacial Area per Volume*Total Pressure)

Height of Overall Gas Phase Transfer Unit in Packed Column

Go Height of Transfer Unit = (Molar Gas Flowrate)/(Overall Gas Phase Mass Transfer Coefficient*Interfacial Area per Volume*Total Pressure)

Gas Molar Flux given Height of Transfer Unit and Interfacial Area

Go Molar Gas Flowrate = Height of Transfer Unit*(Overall Gas Phase Mass Transfer Coefficient*Interfacial Area per Volume*Total Pressure)

HETP of Packed Columns using 25 and 50mm Raschig Rings

Go Height Equivalent to Theoretical Plate = 18*Diameter of Rings+12*(Average Equilibrium Slope)*((Gas Flow/Liquid Mass Flowrate)-1)

Number of Transfer Units for Dilute System in Packed Column

Go Number Of Transfer Units-Nog = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(Log Mean Driving Force)

Gas Film Mass Transfer Coefficient given Column Performance and Interfacial Area

Go Gas Film Transfer Coefficient = (Column Performance*Molar Gas Flowrate)/(Interfacial Area per Volume)

Performance of Column Given Gas-Film Transfer Coefficient and Vapor Flowrate

Go Column Performance = (Gas Film Transfer Coefficient*Interfacial Area per Volume)/Molar Gas Flowrate

Interfacial Area of Packing Given Performance of Column and Gas Flowrate

Go Interfacial Area per Volume = (Column Performance*Molar Gas Flowrate)/Gas Film Transfer Coefficient

Gas Flowrate given Column Performance and Interfacial Area

Go Molar Gas Flowrate = (Gas Film Transfer Coefficient*Interfacial Area per Volume)/Column Performance

Average Specific Pressure Drop Given Top Bed Pressure Drop and Bottom Bed Pressure Drop

Go Average Pressure Drop = ((0.5*(Top Bed Pressure Drop)^0.5)+(0.5*(Bottom Bed Pressure Drop)^0.5))^2

Performance of Column for Known Value of Height of Transfer Unit

Go Column Performance = 1/Height of Transfer Unit

Number of Transfer Units for Dilute System in Packed Column Formula

Number Of Transfer Units-Nog = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(Log Mean Driving Force)
N_og = (y₁-y₂)/(Δy_lm)

What is the Significance of NTU in Columns?

NTU is used to assess how well the gas phase (absorbent) is absorbing a solute (absorbate) from the liquid phase.

The Number of Transfer Units (NTU) provides valuable information about the degree of mass transfer in the absorption column. It helps engineers and researchers assess the performance and efficiency of the absorption process and is often used in the design and optimization of such systems.

How to Calculate Number of Transfer Units for Dilute System in Packed Column?

Number of Transfer Units for Dilute System in Packed Column calculator uses Number Of Transfer Units-Nog = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(Log Mean Driving Force) to calculate the Number Of Transfer Units-Nog, The Number Of Transfer Units for Dilute System in Packed Column formula defines information about the degree of mass transfer in the absorption column. Number Of Transfer Units-Nog is denoted by N_og symbol.

How to calculate Number of Transfer Units for Dilute System in Packed Column using this online calculator? To use this online calculator for Number of Transfer Units for Dilute System in Packed Column, enter Solute Gas Mole Fraction (y₁), Solute Gas Mole Fraction at Top (y₂) & Log Mean Driving Force (Δy_lm) and hit the calculate button. Here is how the Number of Transfer Units for Dilute System in Packed Column calculation can be explained with given input values -> 2 = (0.64-0.32)/(0.16).

FAQ

What is Number of Transfer Units for Dilute System in Packed Column?

The Number Of Transfer Units for Dilute System in Packed Column formula defines information about the degree of mass transfer in the absorption column and is represented as N_og = (y₁-y₂)/(Δy_lm) or Number Of Transfer Units-Nog = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(Log Mean Driving Force). Solute Gas Mole Fraction represents the mole fraction of the solute gas in the bottom of the column, Solute Gas Mole Fraction at Top represents the mole fraction of the solute gas in the top most section of column & Log Mean Driving Force represents the effective driving force for mass transfer in these processes.

How to calculate Number of Transfer Units for Dilute System in Packed Column?

The Number Of Transfer Units for Dilute System in Packed Column formula defines information about the degree of mass transfer in the absorption column is calculated using Number Of Transfer Units-Nog = (Solute Gas Mole Fraction-Solute Gas Mole Fraction at Top)/(Log Mean Driving Force). To calculate Number of Transfer Units for Dilute System in Packed Column, you need Solute Gas Mole Fraction (y₁), Solute Gas Mole Fraction at Top (y₂) & Log Mean Driving Force (Δy_lm). With our tool, you need to enter the respective value for Solute Gas Mole Fraction, Solute Gas Mole Fraction at Top & Log Mean Driving Force 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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