Novel use of dividing wall columns for intensification multicomponent batch distillations

Diwekar, Urmila M.

doi:10.1016/j.cep.2021.108400

Cited by 9 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An additional liquid stream is arranged to transfer heavy component D from Area2 to Area3 by means of a valve between the two side bottoms of the DWBDM. The basic operating steps are as follows: Feeding in four separate tanks during the start-up phase, the composition on each column plate is assumed to be the same as that of the feed material, and placing less feed material in Area2, which will reduce the time taken to transfer D from bottom 2 to 3 through the valve. Operating at total reflux until the composition of D in Area2 bottom is below 0.01. Close the transferring valve V3. Continuing to run until heavy component D in the left side of the dividing wall starts to rise and cross the dividing wall, which will be disadvantageous for separation in the right side and can be prevented by adjusting the vapor load at two sides and liquid split ratios.…”

Section: Modeling Of Three Configurations Of Batch Distillationmentioning

confidence: 99%

Section: Multiple Middle Vessel Batch Distillationmentioning

confidence: 99%

“…Agrawal first proposed the application of DWCs for batch distillation and compared the capacity of this new batch distillation configuration having DWCs and middle vessels with that of TBD in separating ternary mixtures and proved that this new configuration has better performance. 15,17 Lopez-Saucedo et al only considered single-component product separation from the multicomponent mixture; no significant benefit was observed from the dividing wall version used in their work. 16 DWCs can be further integrated with middle vessels in the field of batch distillation to increase versatility; however, intermediate cuts were still generated in their results, which led to some disadvantages.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with conventional distillation processes, the dividing wall column (DWC), integrating two or more columns into one shell using one or more vertical walls, can realize equivalent separation capacity but needs less energy consumption, investment, and space. – There are few published papers or reports on the use of DWCs for batch distillation. Agrawal first proposed the application of DWCs for batch distillation and compared the capacity of this new batch distillation configuration having DWCs and middle vessels with that of TBD in separating ternary mixtures and proved that this new configuration has better performance. , Lopez-Saucedo et al only considered single-component product separation from the multicomponent mixture; no significant benefit was observed from the dividing wall version used in their work . DWCs can be further integrated with middle vessels in the field of batch distillation to increase versatility; however, intermediate cuts were still generated in their results, which led to some disadvantages.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integration of Dividing Wall Columns with Middle Vessels for Batch Distillation under Total Reflux: Modeling and Optimization

Zhou

Wang

Song

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Dividing wall columns, one of the thermally coupled distillation technologies, are widely used in the continuous separation process due to their energy-saving advantages because multiple middle-vessel columns are an important improvement over traditional batch distillation (TBD). To save energy requirement and time consumption further for batch distillation, a novel batch distillation configuration was proposed: the middle vessel-coupled dividing wall distillation column, which is different from the other two configurations of TBD, and multiple middle-vessel batch distillation. Detailed modeling and optimization of the above three configurations were conducted using a particle swarm algorithm, where the quaternary mixture of n-pentane (C5), n-hexane (C6), n-heptane (C7), and n-octane (C8) was used as a case. The results show that the separation time of the multiple middle-vessel column was the shortest when the purity requirement was not high, while the separation capacity of the new configuration was the best under the same conditions and no intermediate cuts were produced. Finally, the operation strategy of the new configuration was improved by adding fresh feed in the tank of the column top.

show abstract

Section: Modeling Of Three Configurations Of Batch Distillationmentioning

confidence: 99%

Section: Multiple Middle Vessel Batch Distillationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integration of Dividing Wall Columns with Middle Vessels for Batch Distillation under Total Reflux: Modeling and Optimization

Zhou

Wang

Song

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Aqar et al 9 proposed a semi-batch reactive distillation column in which additional methanol would be fed in a continuous fashion at the bottom of the column, allowing the synthesis of methyl palmitate to continue, shown, in terms of product quality, the gap between reflux ratios on double-period intervals drops with the product specification constraint imposed. Diwekar et al 10 analyzed the separation wall column of batch distillation in detail and established the operating procedure and mathematical model for the separation wall stripping column. The performance of this new configuration is compared with that of the conventional intermittent rectifiers and intermediate container columns.…”

Section: Introductionmentioning

confidence: 99%

Pressure-Driven Batch Distillation Optimal Control for Ethanol-Water Separation

Stojkovic¹

2023

Fine Chemical Engineering

View full text Add to dashboard Cite

Ethanol-water separation by pressure-swing batch distillation in a double-batch rectifier system is a process under investigation. In this work, a complete global solution to the optimal control problem in the form of a sequential synthesis of controlled trajectories is derived. During this study, the optimal reflux strategy through cyclic operation was extended to the separation of a second non-ideal minimum boiling azeotrope of industrial importance. The optimal cyclic reflux ratio operating policy, brought significant reductions in time duration, going up to even 50%. Consequently even more significant reductions in energy expenditure, since the derived discontinuous energy function tends to show cyclic “behavior” as well. Lastly, the proposed strategy provides the possibility to highly recover the desired product even within a single period, and finally maybe even the most importantly, flexibility in operating different units within the time frame.

show abstract

Controllability and Energy‐Saving Ability of the Dividing‐Wall Column for Batch Distillation

Qian

Yuan

et al. 2023

Chem Eng & Technol

View full text Add to dashboard Cite

The batch distillation is significant and flexible to separate liquid mixtures. However, it is usually energy intensive. The dividing‐wall column (DWC) is a promising and practical energy‐saving process intensification technology. The DWC for batch distillation (batch DWC) to separate benzene, toluene, and xylene mixtures was examined with composition and temperature control structures to verify its controllability. Besides, the batch DWC outperforms the conventional single‐column batch distillation and middle‐vessel batch distillation in terms of distillation time and energy consumption under the same conditions. In terms of more practical temperature control results, the batch DWC saves 63 % of energy compared with the conventional single‐column batch distillation and 47 % of energy compared with the middle‐vessel batch distillation.

show abstract

Novel use of dividing wall columns for intensification multicomponent batch distillations

Cited by 9 publications

References 15 publications

Integration of Dividing Wall Columns with Middle Vessels for Batch Distillation under Total Reflux: Modeling and Optimization

Integration of Dividing Wall Columns with Middle Vessels for Batch Distillation under Total Reflux: Modeling and Optimization

Pressure-Driven Batch Distillation Optimal Control for Ethanol-Water Separation

Controllability and Energy‐Saving Ability of the Dividing‐Wall Column for Batch Distillation

Contact Info

Product

Resources

About