Transient dynamics in a membrane module with a pulsed change of retentate: modeling and experimental study of an unsteady-state mode of membrane gas separation process

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F21%3A00537075" target="_blank" >RIV/61389013:_____/21:00537075 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1383586620326745?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586620326745?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2020.118201" target="_blank" >10.1016/j.seppur.2020.118201</a>

Result language

angličtina

Original language name

Transient dynamics in a membrane module with a pulsed change of retentate: modeling and experimental study of an unsteady-state mode of membrane gas separation process

Original language description

The paper brings new insights into the analysis of the dynamics of a novel unsteady-state pulsed retentate membrane process for efficient gas separation and purification applications. Pulsed retentate process involves alternating a closed-mode operation and short-term retentate withdrawals which improves the separation performance of the module. The transient dynamics of the pulsed retentate gas separation is evaluated through a rigorous simulation and experimental study. A new mathematical model is developed to relate the component concentration to the coordinate and time during the process for optimization purposes of the unsteady-state separation. The axial mixing effect on the separation efficiency under unsteady-state conditions, unexplored up to now, is specifically studied by the analysis of the Peclet number behavior. The proposed theoretical model is validated against the experimental data obtained for transient processes under changing retentate flow for a binary model mixture based on He with 1 vol% of n-C4H10 as a high permeable component. The agreement between the simulation and experimental data is shown both for transient and steady-state periods. Customized experimental techniques are used employing periodic gas chromatography samplings and in-situ on-line monitoring of gas mixture composition via mass spectrometry for transients. The complete model of a pulsed retentate operation involving cyclic alternation of non-withdrawal and withdrawal periods is developed and validated both against current experimental data (He/n-C4H10 mixture, PDMS-based membrane) and previously obtained results (N2/N2O and N2/CO2 mixtures, poly(arylate-siloxane) membrane). The agreement between the simulation results and the experimental data is shown for short-cycle separation modes, and the discrepancies for longer cycle operation cases are discussed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Separation and Purification Technology

ISSN

1383-5866

e-ISSN

1873-3794

Volume of the periodical

259

Issue of the periodical within the volume

15 March

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

118201

UT code for WoS article

000605006300008

EID of the result in the Scopus database

2-s2.0-85098196539