Manipulation of vapour split in Kaibel distillation arrangements

Ghadrdan, Maryam; Halvorsen, Ivar J.; Skogestad, Sigurd

doi:10.1016/j.cep.2013.06.014

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…This arrangement can be used in refinery plants where the product purities do not play a vital role or when a bottleneck problem occurs in the process 30. Recently, the Kaibel arrangement was investigated further by means of an examination of the effects of vapor split manipulation 31.…”

Section: Intensification Of Separation Processesmentioning

confidence: 99%

Intensified Distillation‐Based Separation Processes: Recent Developments and Perspectives

et al. 2016

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Greater sustainability can be achieved by decreasing the production costs, energy consumption, equipment size, and environmental impact as well as improvement of the raw material yields, remote control, and process flexibility. Process intensification (PI) as the main route for improving the process performance is used widely in heat transfer, reactions, separation, and mixing, which results in plant compactness, cleanliness, and energy efficiency. Some of the main intensified separation processes and improvement mechanisms are reviewed briefly with the main focus on the PI of distillation processes, which are the most important separation methods. In addition to these technologies, the potential and reliability of reactive separation processes are addressed briefly, which will enable higher efficiency and capacity.

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Section: Intensification Of Separation Processesmentioning

confidence: 99%

Intensified Distillation‐Based Separation Processes: Recent Developments and Perspectives

et al. 2016

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“…KDWC exhibits a great potential industrial application prospect for the separation of a four-component mixture because of its relatively simple structure and cost savings. Thus, great efforts have focused on the operability and controllability of the KDWC. − Strandberg et al investigated the stabilizing control of a KDWC by maximizing the product purity with fixed energy usage, and the liquid split ratio was found to have an impact on the column’s sensitivity to disturbances. Two operating schemes, minimizing the vapor flow rate at fixed product purities ( J = V ) and maximizing the product purities with fixed boilup rate ( J = D (1 – x D ) + S 1 (1 – x S 1 ) + S 2 (1 – x S 2 ) + B (1 – x B )), were compared to control a KDWC in Ghadrdan et al.’s work .…”

Section: Introductionmentioning

confidence: 99%

“…The first operation scheme was found to be more difficult to operate because of multiplicity issues and a narrow operating region. They further numerically studied the influence of vapor split manipulation for the control of a KDWC and concluded that the KDWC may not maintain minimum energy operation at the fixed vapor split ratio when facing feed disturbances . To handle the dynamic control of the KDWC, researchers numerically investigated the control performance of various control structures.…”

Section: Introductionmentioning

confidence: 99%

“…They further numerically studied the influence of vapor split manipulation for the control of a KDWC and concluded that the KDWC may not maintain minimum energy operation at the fixed vapor split ratio when facing feed disturbances. 40 To handle the dynamic control of the KDWC, researchers numerically investigated the control performance of various control structures. Qian et al 41 investigated various control schemes for the dynamic control of a KDWC.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Research on a Kaibel Divided-Wall Column: Design and Steady-State and Dynamic Operation

Pan

Guichun

et al. 2020

Ind. Eng. Chem. Res.

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This work investigated the full design, startup, operation, and control of a Kaibel divided-wall column (KDWC) for a laboratoryscale KDWC. The KDWC is designed to separate mixtures of methanol, ethanol, n-propanol, and n-butanol on the basis of a rigorous model. Effective steady-state and dynamic operation strategies are then proposed to control the practical operation of the KDWC. The proposed startup operation strategy, including total reflux, batch rectification, and continuous rectification procedures, leads to a steady state, and the steady-state design method is verified through steady-state experiments. The dynamic control strategy including a four-temperature control loop is further proposed and shows effective and precise dynamic control performance, recovering the four products to the specified values in the presence of ±20% feed disturbances. This work provides deep insight into the realization and control of a practical KDWC and will increase the possibility of industrial achievement and optimal operation of the KDWC.

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“…A temperature control structure was proposed, which can handle feed rate disturbances as well as set point change , . Kiss et al investigated the application of a Kaibel column to separate aromatics at high purity levels, which could enhance the energy efficiency by 17 % .…”

Section: Introductionmentioning

confidence: 99%

Remixing Analysis of Four‐Product Dividing‐Wall Columns

et al. 2018

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Dividing-wall columns can separate multicomponent mixtures and offer large energy savings over conventional column sequences. The separation of a mixture of four alcohols was studied in a Kaibel column and a fully extended Petlyuk column or Sargent arrangement, respectively. The flow paths of intermediates are different so that the Sargent arrangement could save more energy. Remixing of intermediates is unavoidable in the Kaibel column because each of them cannot detour all around both ends of the dividing wall. The Sargent arrangement exhibits the desired detouring paths and the remixing of intermediates is alleviated but still occurs in the prefractionator and the middle column. Finally, an alternative configuration of the Sargent arrangement is proposed which presents a better thermodynamic efficiency.

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Manipulation of vapour split in Kaibel distillation arrangements

Cited by 10 publications

References 11 publications

Intensified Distillation‐Based Separation Processes: Recent Developments and Perspectives

Intensified Distillation‐Based Separation Processes: Recent Developments and Perspectives

Numerical and Experimental Research on a Kaibel Divided-Wall Column: Design and Steady-State and Dynamic Operation

Remixing Analysis of Four‐Product Dividing‐Wall Columns

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