Quantitative metrics for evaluating reactive cyclic distillation performance

Rasmussen, Jess Bjørn; Stevnsborg, Mads; Mansouri, Seyed Soheil; Zhang, Xiangping; Abildskov, Jens; Huusom, Jakob Kjøbsted

doi:10.1016/j.cep.2022.108843

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…The pressure drop profiles at the end of VFP are shown in Figure . From Figure , the stage pressure drops in this study are around 2–3 kPa, close to the pressure drop specified in Rasmussen et al’s studies, , suggesting that the correlations used in this study can approximately estimate the cyclic distillation tray pressure drop. In addition, compared with continuous distillation, the pressure drop of cyclic distillation is relatively large, indicating that stage pressure drops that affect the column temperature and relative volatility of components should not be neglected.…”

Section: Case Studysupporting

confidence: 88%

“…The studies on the rigorous design/optimization of cyclic distillation are even fewer. Rasmussen et al , in their later studies extended their model to reactive cyclic distillation and used a trial-and-error method to find designs that satisfy product purity requirements. Yet, this heuristic method aggravates the total computational expense.…”

Section: Introductionmentioning

confidence: 99%

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Pseudo-Transient Modeling-Assisted Rigorous Optimization of Cyclic Distillation Considering Tray Hydraulics

Kang

Luo

Yuan

2023

Ind. Eng. Chem. Res.

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Cyclic distillation is a novel process intensification of distillation with higher separation efficiency. However, its efficient simulation and rigorous optimization have been challenging because a coupled boundary value problem must be solved. This study proposes a novel simulation and optimization approach for cyclic distillation based on the pseudo-transient modeling-assisted discretization method. This method involves discretizing the original dynamic model as an algebraic equation system and then reformulating it as a pseudo-transient model to address the convergence difficulty. Optimization of cyclic distillation was achieved for the first time using a gradient-based optimization method while considering tray hydraulics. The proposed method is shown by illustrating examples more efficiently than conventional methods. Optimization results indicate that the process cost is negatively correlated with the vapor flow period duration, one of the decision variables; however, the process cost could not further reduce at the optimal point due to activation of the weeping constraint provided by the hydraulic model.

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Section: Case Studysupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Pseudo-Transient Modeling-Assisted Rigorous Optimization of Cyclic Distillation Considering Tray Hydraulics

Kang

Luo

Yuan

2023

Ind. Eng. Chem. Res.

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“…Their findings revealed that the cyclic operation had a beneficial impact on the stage performance within the reactive section as a result of decreased back mixing, resulting in improved separation efficiency. Rasmussen et al 185 introduced three quantitative metrics to assess CCD performance: distance from equilibrium (indicating how quickly chemical equilibrium is achieved during the vapor flow period), the total production over a cycle, and the mean Damköhler number over a cycle. These metrics were employed in three case studies for the production of methyl acetate, MTBE and DME, and the mean Damköhler number over a cycle was suggested as a valuable indicator of the viability of CCD.…”

Section: Reactive Dividing Wall Columnmentioning

confidence: 99%

Conceptual methods for synthesis of reactive distillation processes: recent developments and perspectives

Kiss,

Muthia,

Pazmiño‐Mayorga

et al. 2024

J of Chemical Tech & Biotech

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Reactive distillation (RD) is a process intensification technique that offers major advantages over conventional technologies by enabling the integration of reaction and separation into a single apparatus. This integration introduces and exploits complex interaction between mass transfer, chemical reaction and hydrodynamics within an RD column; however, these complexities can hinder the adoption of reactive distillation by industry.Many approaches were developed by the scientific community to advance understanding and to expedite the initialization of RD design at the conceptual level. This paper critically discusses recent developments in conceptual methods for synthesizing RD processes. This review paper is the first to consider the range of available approaches for assessing the technical feasibility, controllability, economic viability, and sustainability, of RD units by taking into account various configurations in which RD is treated as a new unit operation, and as part of process synthesis in a different way of designing processes based on functions. The review also addresses complex configurations, such as advanced RD technologies. Special attention is paid to process modeling and simulation as well as to education. Knowledge gaps to be filled by further research are indicated.This article is protected by copyright. All rights reserved.

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“…Conceptual design studies for the production of dialkyl ethers, including DME, indicated that, compared to conventional RD, CCD could achieve higher product purities while reducing the number of stages and the vapor flow rate. , Rasmussen et al analyzed the production of DME using quantitative metrics to evaluate the performance of CCD, including the mean Damköhler number, which accounts for characteristics of the technology.…”

Section: Case Studies To Demonstrate the Application Of The Synthesis...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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Quantitative metrics for evaluating reactive cyclic distillation performance

Cited by 4 publications

References 29 publications

Pseudo-Transient Modeling-Assisted Rigorous Optimization of Cyclic Distillation Considering Tray Hydraulics

Pseudo-Transient Modeling-Assisted Rigorous Optimization of Cyclic Distillation Considering Tray Hydraulics

Conceptual methods for synthesis of reactive distillation processes: recent developments and perspectives

A Systematic Methodology for the Synthesis of Advanced Reactive Distillation Technologies

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