Experimental analysis and rate-based stage modeling of multicomponent distillation in a Rotating Packed Bed

Hilpert, Matthias; Aranda, Gerson Uriel Calvillo; Repke, Jens‐Uwe

doi:10.1016/j.cep.2021.108651

Cited by 13 publications

(31 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the dependence of n th on n rot using setup A is comparable to the observations by Hilpert et al n th increased with increasing n rot with a slight drop at n rot = 900 r min –1 , yielding a maximum value of n th = 4.0. Setup B reached about half of n th of setup A only.…”

Section: Resultssupporting

confidence: 88%

“…Therefore, the velocity of the liquid using the RBD varies with n rot , whereas full-jet nozzles deliver constant liquid velocity. Hilpert investigated the influence of the liquid velocity of full-jet nozzles on separation performance between 4.1 and 8.3 m s –1 . Since the range of liquid velocity of his study is similar to the velocity of the droplets broken up from the RBD, it is an indication that the velocity of the droplets does not influence the separation performance.…”

Section: Resultsmentioning

confidence: 99%

“…4,5 For instance, Lin et al 6 investigated the distillation of methanol−ethanol at atmospheric pressure and total reflux, and they achieved a maximum of three theoretical stages in a 1R-RPB only (d i = 122 mm, d o = 294 mm, h P = 95 mm). Recently, Hilpert et al 5 accomplished 2−10 theoretical stages in the distillation of ethanol-npropanol at atmospheric pressure and total reflux using a 1R-RPB (d i = 120 mm, d o = 450 mm, h P = 10 mm). To the best of our knowledge, the latter number is the maximum number of theoretical stages that has been reported up to date in a 1R-RPB for distillation.…”

Section: Introductionmentioning

confidence: 99%

“…Rotating packed beds (RPBs) have proven their benefits as process intensification equipment in distillation, absorption, and stripping. − However, the low separation performance especially in machines with one rotor only (1R-RPBs) still limits the applications of RPBs. , For instance, Lin et al investigated the distillation of methanol–ethanol at atmospheric pressure and total reflux, and they achieved a maximum of three theoretical stages in a 1R-RPB only ( d i = 122 mm, d o = 294 mm, h P = 95 mm). Recently, Hilpert et al accomplished 2–10 theoretical stages in the distillation of ethanol- n -propanol at atmospheric pressure and total reflux using a 1R-RPB ( d i = 120 mm, d o = 450 mm, h P = 10 mm). To the best of our knowledge, the latter number is the maximum number of theoretical stages that has been reported up to date in a 1R-RPB for distillation.…”

Section: Introductionmentioning

confidence: 99%

“…1−3 However, the low separation performance especially in machines with one rotor only (1R-RPBs) still limits the applications of RPBs. 4,5 For instance, Lin et al 6 investigated the distillation of methanol−ethanol at atmospheric pressure and total reflux, and they achieved a maximum of three theoretical stages in a 1R-RPB only (d i = 122 mm, d o = 294 mm, h P = 95 mm). Recently, Hilpert et al 5 accomplished 2−10 theoretical stages in the distillation of ethanol-npropanol at atmospheric pressure and total reflux using a 1R-RPB (d i = 120 mm, d o = 450 mm, h P = 10 mm).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Novel Liquid Distributor Concept for Rotating Packed Beds

Pyka

Brunert

Koop

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Multi-rotor RPBs (MR-RPBs) are a promising way to intensify mass transfer by exploiting the centrifugal field while achieving high separation performance. Reaching the full potential of the separation performance of MR-RPBs requires a uniform liquid distribution in each rotor. As conventional liquid distributors like nozzles can only be used at the pressurized inlet of the liquid, a new concept is needed for distribution on additional rotors. For this r eason, a novel liquid distribution concept named rotating baffle distributor (RBD) was developed. It has a compact design and exploits the rotational speed n rot of the rotor. High-speed camera analyses showed that a minimum n rot of 600 r min −1 was required for axial liquid distribution with water at ambient conditions. CT scans revealed a uniform liquid distribution in the circumferential direction using RBD with 36 baffles. Furthermore, RBDs with 12, 24, and 36 baffles were applied to the distillation of ethanol−water at atmospheric pressure under total reflux using a one-rotor RPB (1R-RPB). The F-factor (F G ) was set up to 2.3 Pa 0.5 and n rot up to 1200 r min −1 . The results were compared to the same distillation experiment in the 1R-RPB using the conventional liquid distribution, i.e., spraying the liquid on the packing via a full-jet nozzle. The distillation study revealed that the RBD with 36 baffles showed one theoretical stage higher separation performance at n rot ≥ 900 r min −1 compared to the conventional liquid distribution. Those results suggest that the RBD is not only multi-rotor-compatible but also provides uniform liquid distribution while being easier to adjust and operate than the conventional nozzle setup.

show abstract

Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Novel Liquid Distributor Concept for Rotating Packed Beds

Pyka

Brunert

Koop

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

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