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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Separation and Purification Technology

ISSN

1383-5866

e-ISSN

1873-3794

Svazek periodika

259

Číslo periodika v rámci svazku

15 March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

118201

Kód UT WoS článku

000605006300008

EID výsledku v databázi Scopus

2-s2.0-85098196539