Wall Column
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Distribution by Scientific Domains |
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Selected Abstracts
A Method for the Design of Divided Wall Columns
CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 9 2007
N. Sotudeh
Abstract
A divided wall column has been modeled as a Petlyuk column with no heat transfer across the column wall.
The feed to the column has been generalized as a mixture of saturated liquid and vapor (0 wall columns, have not been applied.
In contrast, a shortcut method based on Underwood's equations has been introduced.
Moreover, it is shown that the split of the internal reflux over both sides of the middle wall of the column is bounded and a method for choosing the proper value of the split ratio is suggested.
This is a novel approach not attempted before by investigators.
[source]
Absorption Rate of Carbon Dioxide by K2CO3 -KHCO3 DEA Aqueous Solution
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING, Issue 1-2 2005
K. Takahshi
Gas absorption rates of carbon dioxide from CO2 -air mixtures into K2CO3, K2CO3 -KHCO3, DEA and K2CO3 -KHCO3 -DEA solutions have been measured by using a wetted wall column.
The method to determine the enhancement factor of chemical absorption is confirmed by the absorption of carbon dioxide in NaOH solution.
The enhancement factor was correlated with the potassium concentration [K+] (= 2[K2CO3 + [KHCO3]), the DEA concentration, and the CO2 -loading ratio of the absorbent.
The chemical reaction for CO2, absorption has been expressed by an (m,n)th order irreversible-reaction model, where the reaction orders are m = 1 for CO2, n = 1.35 for DEA, n = 0.6 for K2CO3, and n = 0.6 and 1.35 for K2CO3 and DEA respectively.
Experimental values of the enhancement factor were successfully reproduced by the calculations, where the reaction rate constants reflected the effect of loading ratio of the absorbent with carbon dioxide.
[source]
A Method for the Design of Divided Wall Columns
CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 9 2007
N. Sotudeh
Abstract
A divided wall column has been modeled as a Petlyuk column with no heat transfer across the column wall.
The feed to the column has been generalized as a mixture of saturated liquid and vapor (0 wall columns, have not been applied.
In contrast, a shortcut method based on Underwood's equations has been introduced.
Moreover, it is shown that the split of the internal reflux over both sides of the middle wall of the column is bounded and a method for choosing the proper value of the split ratio is suggested.
This is a novel approach not attempted before by investigators.
[source]
Dividing Wall Distillation Columns: Optimization and Control Properties
CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 9 2008
F. I. Gómez-Castro
Abstract
The optimal design of dividing wall columns is a non-linear and multivariable problem, and the objective function used as optimization criterion is generally non-convex with several local optimums.
Considering this fact, in this paper, we studied the design of dividing wall columns using as a design tool, a multi-objective genetic algorithm with restrictions, written in MatlabTM and using the process simulator Aspen PlusTM for the evaluation of the objective function.
Numerical performance of this method has been tested in the design of columns with one or two dividing walls and with several mixtures to test the effect of the relative volatilities of the feed mixtures on energy consumption, second law efficiency, total annual cost, and theoretical control properties.
In general, the numerical performance shows that this method appears to be robust and suitable for the design of sequences with dividing walls.
[source]
A Method for the Design of Divided Wall Columns
CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 9 2007
N. Sotudeh
Abstract
A divided wall column has been modeled as a Petlyuk column with no heat transfer across the column wall.
The feed to the column has been generalized as a mixture of saturated liquid and vapor (0 wall columns, have not been applied.
In contrast, a shortcut method based on Underwood's equations has been introduced.
Moreover, it is shown that the split of the internal reflux over both sides of the middle wall of the column is bounded and a method for choosing the proper value of the split ratio is suggested.
This is a novel approach not attempted before by investigators.
[source]
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