Catalytic cyclic distillation – A novel process intensification approach in reactive separations

Pătruţ, Cătălin; Bîldea, Costin Sorin; Kiss, Anton A.

doi:10.1016/j.cep.2014.04.006

Cited by 30 publications

(36 citation statements)

References 49 publications

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“…Moreover, the separate phase movement of the vapor and liquid phases throughout the column provides more degrees of freedom which contribute to excellent process control and trouble‐free operation. The literature review and industrial reports available indicate several benefits of cyclic operation over conventional methods: High tray efficiencies (140–300% Murphree efficiency), so that at the same vapor‐flow rate a required purity can be obtained using fewer trays – hence reduced capital costs. Higher throughput and equipment productivity compared with conventional distillation. Reduced energy requirements, so that a required purity can be achieved with lower vapor‐flow rates, at the same number of trays – thus lowering operating costs by 30–50%. Increased quality of the products is possible due to the higher separation efficiency. The cyclic distillation configuration and operation allows larger liquid holdups that can be beneficial for reactive distillation concepts, such as catalytic cyclic distillation …”

Section: Discussionmentioning

confidence: 99%

“…• The cyclic distillation configuration and operation allows larger liquid holdups that can be beneficial for reactive distillation concepts, such as catalytic cyclic distillation. 19 Cyclic distillation has many promising prospects, but in order to flourish further, the future research on this topic has to address the main challenges faced by this PI technology:…”

Section: Discussionmentioning

confidence: 99%

“…A breakthrough was recently achieved when a new type of tray especially designed for cyclic operation was invented . The special trays – shown in Figs and – are provided with valves and sluice chambers located under the trays …”

Section: Equipment For Cyclic Distillationmentioning

confidence: 99%

“…18 The special trays -shown in Figs 3 and 4 -are provided with valves and sluice chambers located under the trays. 19,20 The operating principle is the following: during the vapor-flow period, the valves are closed and the liquid stays on the tray. During the liquid-flow period, the valves open and the liquid flows from the tray to the sluice chamber below.…”

Section: Equipment For Cyclic Distillationmentioning

confidence: 99%

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Cyclic distillation technology - a mini-review

Bîldea

Pătruţ

Jørgensen

et al. 2016

J. Chem. Technol. Biotechnol.

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Process intensification in distillation systems has received much attention during the past decades, with the aim of increasing both energy and separation efficiency. Various techniques, such as internal heat-integrated distillation, membrane distillation, rotating packed bed, dividing-wall columns and reactive distillation were studied and reported in literature.All these techniques employ the conventional continuous counter-current contact of vapor and liquid phases. Cyclic distillation technology is based on an alternative operating mode using separate phase movement which leads to key practical advantages in both chemical and biochemical processes. This article provides a mini-review of cyclic distillation technology.The topics covered include the working principle, design and control methods, main benefits and limitations as well as current industrial applications. Cyclic distillation can be rather easily implemented in existing columns by simply changing the internals and the operating mode, thus bringing new life in old distillation towers by significantly increasing the column throughput, reducing the energy requirements and offering a better separation performance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Equipment For Cyclic Distillationmentioning

confidence: 99%

Section: Equipment For Cyclic Distillationmentioning

confidence: 99%

See 2 more Smart Citations

Cyclic distillation technology - a mini-review

Bîldea

Pătruţ

Jørgensen

et al. 2016

J. Chem. Technol. Biotechnol.

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“…Catalytic cyclic distillation (CCD) exploits the synergies of combined reaction and separation by manipulating the duration of an event (e.g., residence time) in a cyclic operation. The two-step cycle consists of a vapor-flow period where vapor travels upward while the reaction occurs in the liquid phase and a liquid-flow period where the liquid flows downward from one tray to the next, avoiding remixing (Figure d) . The residence time can be enlarged by manipulating the duration of the vapor flow period.…”

Section: Advanced Reactive Distillation Technologies: Main Features A...mentioning

confidence: 99%

A Systematic Methodology for the Synthesis of Advanced Reactive Distillation Technologies

Pazmiño-Mayorga

Jobson

Kiss

2023

Ind. Eng. Chem. Res.

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This study is the first to provide a systematic approach to assessing the potential of advanced reactive distillation technologies to expand the applicability of reactive distillation. The work presented here focuses on the synthesis of advanced reactive distillation technologies, proposing a conceptually based methodology for earlystage screening. The methodology uses basic thermodynamic and kinetic data to navigate a decision-making flowchart in four steps: compositions and splits, basic properties and operating windows, kinetics, and phase equilibria. The results qualify advanced reactive distillation technologies as advantageous, technically feasible, or not applicable. Five industrially relevant case studies illustrate the application of the methodology to develop preliminary process flowsheets. The proposed methodology aims to guide technology selection using basic data while providing flexibility to meet the objectives of the design problem. This methodology contributes to integrating a technology-oriented approach normally followed in process intensification studies into a process systems engineering approach by developing a conceptual flowsheet in the early stages of process design.

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Pilot‐scale studies of process intensification by cyclic distillation

Maleta¹,

Shevchenko

Bedryk

et al. 2015

AIChE Journal

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Process intensification in distillation systems receives much attention with the aim of increasing both energy and separation efficiency. Several technologies have been investigated and developed, as for example: dividing‐wall column, HiGee distillation, or internal heat‐integrated distillation. Cyclic distillation is a different method based on separate phase movement—achievable with specific internals and a periodic operation mode—that leads to key advantages: increased column throughput, reduced energy requirements, and better separation performance. This article is the first to report the performance of a pilot‐scale distillation column for ethanol‐water separation, operated in a cyclic mode. A comparative study is made between a pilot‐scale cyclic distillation column and an existing industrial beer column used to concentrate ethanol. Using specially designed trays that truly allow separate phase movement, the practical operation confirmed that 2.6 times fewer trays and energy savings of about 30% are possible as compared with classic distillation. © 2015 American Institute of Chemical Engineers AIChE J, 61: 2581–2591, 2015

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Catalytic cyclic distillation – A novel process intensification approach in reactive separations

Cited by 30 publications

References 49 publications

Cyclic distillation technology - a mini-review

Cyclic distillation technology - a mini-review

A Systematic Methodology for the Synthesis of Advanced Reactive Distillation Technologies

Pilot‐scale studies of process intensification by cyclic distillation

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