Analysing separation and reaction stage performance in a reactive cyclic distillation process

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

doi:10.1016/j.cep.2021.108515

Cited by 8 publications

(25 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

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

Kang

Luo

Yuan

2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

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.

show abstract

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.

View full text Add to dashboard Cite

show abstract

“…However, temperature profiles were different because of the variations observed during the vapor flow period when taking into account heat transfer. In an effort to simplify the process, Rasmussen et al 184 applied the previously proposed model in a well-known case study involving MTBE production, assuming chemical equilibrium. 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.…”

Section: Reactive Dividing Wall Columnmentioning

confidence: 99%

“…Simulation of cyclic distillation, both for the steady-state model and for the dynamic vapor flow periods, has been carried out in MATLAB. 184 However, commercial software for chemical process design cannot be adapted for simulating cyclic processes because the hydrodynamic limitations seen in operation are not reflected. This issue arises from the fact that data about internals included in such software are not suitable for cyclic distillation, as pointed out by Kiss and Maleta.…”

Section: Reactive Dividing Wall Columnmentioning

confidence: 99%

Section: Advanced Reactive Distillation Technologiesmentioning

confidence: 99%

See 1 more Smart Citation

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

Kiss,

Muthia,

Pazmiño‐Mayorga

et al. 2024

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

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.

show abstract

Elevated energy efficiency and reduced CO2 emissions from integrated reaction and separation for the concurrent production of ethers

Lee,

Kim

et al. 2023

Korean J. Chem. Eng.

View full text Add to dashboard Cite

Analysing separation and reaction stage performance in a reactive cyclic distillation process

Cited by 8 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

Elevated energy efficiency and reduced CO2 emissions from integrated reaction and separation for the concurrent production of ethers

Contact Info

Product

Resources

About