Porous medium equation in graphene oxide membrane: Nonlinear dependence of permeability on pressure gradient explained

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43922202" target="_blank" >RIV/60461373:22340/21:43922202 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22810/21:43922202

Výsledek na webu

<a href="https://www.mdpi.com/2077-0375/11/9/665" target="_blank" >https://www.mdpi.com/2077-0375/11/9/665</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/membranes11090665" target="_blank" >10.3390/membranes11090665</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Porous medium equation in graphene oxide membrane: Nonlinear dependence of permeability on pressure gradient explained

Popis výsledku v původním jazyce

Membrane performance in gas separation is quantified by its selectivity, determined as a ratio of measured gas permeabilities of given gases at fixed pressure difference. In this manuscript a nonlinear dependence of gas permeability on pressure difference observed in the measurements of gas permeability of graphene oxide membrane on a manometric integral permeameter is reported. We show that after reasoned assumptions and simplifications in the mathematical description of the experiment, only static properties of any proposed governing equation can be studied, in order to analyze the permeation rate for different pressure differences. Porous Medium Equation is proposed as a suitable governing equation for the gas permeation, as it manages to predict a nonlinear behavior which is consistent with the measured data. A coefficient responsible for the nonlinearity, the poly-tropic exponent, is determined to be gas-specific—implications on selectivity are discussed, alongside possible hints to a deeper physical interpretation of its actual value. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Název v anglickém jazyce

Porous medium equation in graphene oxide membrane: Nonlinear dependence of permeability on pressure gradient explained

Popis výsledku anglicky

Membrane performance in gas separation is quantified by its selectivity, determined as a ratio of measured gas permeabilities of given gases at fixed pressure difference. In this manuscript a nonlinear dependence of gas permeability on pressure difference observed in the measurements of gas permeability of graphene oxide membrane on a manometric integral permeameter is reported. We show that after reasoned assumptions and simplifications in the mathematical description of the experiment, only static properties of any proposed governing equation can be studied, in order to analyze the permeation rate for different pressure differences. Porous Medium Equation is proposed as a suitable governing equation for the gas permeation, as it manages to predict a nonlinear behavior which is consistent with the measured data. A coefficient responsible for the nonlinearity, the poly-tropic exponent, is determined to be gas-specific—implications on selectivity are discussed, alongside possible hints to a deeper physical interpretation of its actual value. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Membranes

ISSN

2077-0375

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

000699607000001

EID výsledku v databázi Scopus

2-s2.0-85114326230