Dividing wall columns in chemical process industry: A review on current activities

Yildirim, Ömer; Kiss, Anton A.; Kenig, Eugeny Y.

doi:10.1016/j.seppur.2011.05.009

Cited by 364 publications

(217 citation statements)

References 57 publications

(89 reference statements)

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“…For the design of mDWC, computer-based rigorous simulations are indispensable [5]. Even though there are no default models in process simulators available for Dividing Wall Columns with more than one dividing wall, there are methods to implement these that result in a thermodynamically consistent flowsheet.…”

Section: Introductionmentioning

confidence: 99%

Robust Initialization of Rigorous Process Simulations of Multiple Dividing Wall Columns via Vmin Diagrams

2018

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Dividing Wall Columns (DWCs) allow the separation of a ternary mixture in one column shell by applying a vertical partition wall, yielding a reduction of operational and capital costs of up to 30%. Multiple DWC (mDWC), the consequent advancement of standard DWC, makes use of more than one partitioning wall, allowing the separation of quaternary or even higher mixtures in one column shell accompanied by a further reduction of energy consumption. Since no dedicated models for these columns are available in commercial process simulators, thermodynamic consistent flowsheets have to be designed and implemented. The thermally fully coupled Petlyuk arrangement is one important example. However, the initial convergence of these substituting flowsheets is demanding, since a large number of meaningful initial guesses have to be provided. A promising method for generating these first estimates are minimum vapor (V min ) diagrams. All internal flows can be extracted from these diagrams and used for robust initialization of the simulation. The goal of this work is to present the V min method in a comprehensive way in order to initialize mDWC simulations to predict the separation of four component mixtures. Additionally, the adaptation of the diagram to configurations different than Petlyuk arrangements for mDWC is evaluated and a systematic procedure to obtain them is presented. In the end, an example of a converging simulation is given, which was obtained with the values from the V min diagram.

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Section: Introductionmentioning

confidence: 99%

Robust Initialization of Rigorous Process Simulations of Multiple Dividing Wall Columns via Vmin Diagrams

2018

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“…The SwoMV configuration has been demonstrated for the purification of a benzene, toluene and o-xylene mixture (Meidanshahi and Adams, 2015b), however no one has used it to separate DME from its reaction by-products or any four-component mixtures. and two heat exchangers to separate three components, this configuration not only has a lower capital cost, but also is more energetically favourable than continuous distillation (Yildirim et al, 2011). For certain situations, continuous DWC are cheaper than conventional continuous distillation (Yildirim et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…and two heat exchangers to separate three components, this configuration not only has a lower capital cost, but also is more energetically favourable than continuous distillation (Yildirim et al, 2011). For certain situations, continuous DWC are cheaper than conventional continuous distillation (Yildirim et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Space-constrained purification of dimethyl ether through process intensification using semicontinuous dividing wall columns

Ballinger

Adams

2017

Computers & Chemical Engineering

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This pre-print has been archived on the author's personal website (macc.mcmaster.ca) and/or the author's institutional repository (macsphere.mcmaster.ca) in compliance with the National Sciences and Engineering Research Council (NSERC) policy on open access and in compliance with Elsevier's academic sharing policies. ABSTRACTIn this work, a distillation system that purifies dimethyl ether (DME) from its reaction by-products is designed to aid in the conversion of natural gas, flare gas, or solution gas into a useful energy product in remote locations. The distillation equipment must fit inside of a 40-foot shipping container to be easily transported.Given the size constraint of the system, process intensification is the best strategy to efficiently separate the mixture. Several process intensification distillation techniques are explored, including the dividing wall column (DWC) and a novel semicontinuous dividing wall column (S-DWC). The traditional DWC and the S-DWC both purify DME to fuel grade purity along with producing high purity waste streams. The S-DWC purifies the reaction intermediate methanol to a higher grade than the DWC and is pure enough to recycle back to the reactor. An economic comparison is made between the three systems. While the DWC is a cheaper method of producing DME, the trade-off is the purity of the methanol produced.Overall, this research shows that it is possible to purify DME and its reaction byproducts in a 40-foot distillation column at a cost that is competitive with Diesel.

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“…Distillation is one of the most important fields in process engineering and attracts an important attention as reported by Yildirim et al (2011). Several distillation shortcut methods already exist including methods with graphical tools, but the latter have two major inconveniences.…”

Section: Introductionmentioning

confidence: 99%

Production Zone Method: a New Non-ideal Shortcut Method for Distillation Column Design

Worms

Meyer

Rouzineau

et al. 2017

Computer Aided Chemical Engineering

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This work describes a new non-ideal shortcut method for distillation design and includes a graphical representation. Based on the operation leaves of Castillo et al. (1998) the method uses production segment rather than completely specified product which eliminates any sensitivity to the composition of the minor products. It has two aims. The first is to determine if a specified separation respects the mass balance and the thermodynamic feasibility. The second one is to find the minimum reflux ratio and a preliminary design of the column. The following mixtures are investigated: an ideal mixture of ethanol, n-propanol, and n-butanol; a non-ideal mixture of acetone, water, and acetic acid; and an azeotropic mixture of acetone, isopropanol, and water. Designs obtained with this new method lead to purity and recovery rate close to specifications which is sometimes impossible with conventional ideal shortcut like the well-known Fenske-Underwood-Gilliland shortcut.

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Dividing wall columns in chemical process industry: A review on current activities

Cited by 364 publications

References 57 publications

Robust Initialization of Rigorous Process Simulations of Multiple Dividing Wall Columns via Vmin Diagrams

Robust Initialization of Rigorous Process Simulations of Multiple Dividing Wall Columns via Vmin Diagrams

Space-constrained purification of dimethyl ether through process intensification using semicontinuous dividing wall columns

Production Zone Method: a New Non-ideal Shortcut Method for Distillation Column Design

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