An Integrated Design Method for Rotating Packed Beds for Distillation

Sudhoff, Daniel; Neumann, Kolja; Lutze, Philip

doi:10.1016/b978-0-444-63455-9.50052-0

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…The observed high increase of CO 2 absorption rate, up to 18 times the nominal value without CA, may be the result of the significantly higher F factor compared to the packed column and the increased surface area of the packing. Moreover, the impact of centrifugal force can be important (Sudhoff et al 2014, Neumann et al 2018. The highest increase in CO 2 absorption rate for liquid flow rate 0.18 m 3 h −1 was recorded with gas flow rate 20 m 3 h −1 and both rotational speeds (Figs.…”

Section: Resultsmentioning

confidence: 93%

Enzyme-enhanced CO2 absorption process in rotating packed bed

et al. 2018

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Carbon dioxide is considered the most important contributor to the global warming effect. To reduce greenhouse gas emissions, CO 2 should be separated from the exhaust gas stream in a selective way. The most often applied technology to capture CO 2 from exhaust gases is the reactive absorption in aqueous amine solutions, which is currently widely used in different industrial applications. The efficiency of this technology could be improved by applying high-gravity technologies that intensify mass transfer and can enable substantial equipment size reduction compared to the traditionally used packed columns. Rotating packed bed (RPB) technology meets these requirements very well. Applying innovative materials such as the highly efficient enzyme carbonic anhydrase can further improve the efficiency of the CO 2 absorption process. This combination of intensified technology together with new solvents is expected to improve the total efficiency of CO 2 absorption. In this study, we present our experimental results of CO 2 absorption using 30 wt% N-methyldiethanolamine (MDEA) solution in water in an RPB unit with and without carbonic anhydrase for different gas and liquid flow rates. The results indicate significantly improved performance of CO 2 absorption, up to 18 times compared to the solvent without enzyme. Keywords Rotating packed bed • RPB • CO 2 absorption • Carbonic anhydrase • MDEA Symbols a Specific surface area of the packing m 2 m −3 A Cross-section area m 2 c %MDEA MDEA concentration in water solution % F factor F factor Pa 0.5 M MDEA Molar mass of MDEA kg kmol −1 n CO 2 ,abs Molar flow rate of total absorbed CO 2 mol h −1 n CO 2 ,abs,packing Molar flow rate of absorbed CO 2 inside the packing mol h −1ṅ CO 2 ,abs,case Molar flow rate of absorbed CO 2 in the casing mol h −1 n G in CO 2 Molar flow rate of CO 2 in gas inlet mol h −1 n G inside CO 2 Molar flow rate of CO 2 in the casing mol h −1 n G out CO 2 Molar flow rate of CO 2 in gas outlet mol h −1 p Pressure Pa R Gas constant J mol −1 K −1 T Temperature K u L Specific liquid load m 3 m −2 h −1 v in CO 2 Volume fraction of CO 2 in gas inlet m 3 m −3 v inside CO 2 Volume fraction of CO 2 in gas m 3 m −3 v out CO 2 Volume fraction of CO 2 in gas outlet m 3 m −3 V G Volumetric gas flow m 3 h −1 V L Volumetric liquid flow m 3 h −1 Y CO 2 CO 2 loading mol mol −1 Greek letters Porosity of the packing m 3 m −3 G Density of gas kg m −3 MDEA Density of MDEA kg m −3

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Section: Resultsmentioning

confidence: 93%

Enzyme-enhanced CO2 absorption process in rotating packed bed

et al. 2018

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“…More recently, Sudhoff et al . presented an integrated design methodology for distillation in RPBs, which is based on the procedure presented by Agarwal et al .…”

Section: Process Design and Controlmentioning

confidence: 99%

“…More recently, Sudhoff et al 102,104 presented an integrated design methodology for distillation in RPBs, which is based on the procedure presented by Agarwal et al The method can be used as a tool for feasibility studies for the application of rotating packed beds for distillation. Their integrated design method enables the selection of an appropriate range of operating and design variables to design a highly flexible RPB that can handle a range of feed compositions.…”

Section: Process Design and Controlmentioning

confidence: 99%

A review on process intensification in HiGee distillation

Garcia

Schaaf

Kiss

2017

J of Chemical Tech & Biotech

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15This review paper describes the state-of-the-art in the field of HiGee contactors used for gas-16 liquid mass transfer processes, with a special focus on distillation, and for heterogeneously 17 catalyzed reactions. 18Several types of rotating beds are discussed, including single-block rotating packed-bed, split-19 packing rotating bed, rotating zigzag bed, two-stage counter-current rotating packed bed, 20 blade packing rotating packed bed, rotating bed with blade packing and baffles, counter-flow 21 concentric-ring rotating bed and crossflow concentric-baffle rotating bed. 22The working principles of HiGee technology, as well as the modeling, design and control 23 aspects, and practical applications are explained and discussed. In addition, this paper 24 addresses the advantages and disadvantages with respect to mass-transfer performance, 25 pressure drop, rotor complexity and suitability to perform continuous distillation and to be 26

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Modelling of vacuum distillation in a rotating packed bed by Aspen

Song

et al. 2017

Applied Thermal Engineering

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An Integrated Design Method for Rotating Packed Beds for Distillation

Cited by 5 publications

References 10 publications

Enzyme-enhanced CO2 absorption process in rotating packed bed

Enzyme-enhanced CO2 absorption process in rotating packed bed

A review on process intensification in HiGee distillation

Modelling of vacuum distillation in a rotating packed bed by Aspen

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