Experimental and numerical study of the flux of isobutane vapors near saturation through multi-layered ceramic membranes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F23%3A00564364" target="_blank" >RIV/67985858:_____/23:00564364 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S138358662202161X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S138358662202161X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2022.122604" target="_blank" >10.1016/j.seppur.2022.122604</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental and numerical study of the flux of isobutane vapors near saturation through multi-layered ceramic membranes

Popis výsledku v původním jazyce

The transport of vapors of isobutane near saturation through multi-layered asymmetric membranes is investigated experimentally and theoretically. The influence of the upstream state of the vapor, whether far or close to saturation, and of the orientation of the membrane on the mass flow rate is investigated. For a membrane with five layers, the mass flux increases from about 0.25 kg m−2s−1 for a vapor further from saturation to about 0.45 kgm−2s−1 for a vapor close to saturation. Also, close to saturation the mass flux in the flow direction from the separation layer to the support is up to 50% larger than in the opposite direction. The membranes consist of three to five layers, the support has a pore size of 3 μm, the finest separationnlayer has a pore size of 20 nm. Plane, circular membranes were tested in steady-state permeation experiments. The upstream pressure varied between about 0.3 times the saturation pressure and a value a few percent smaller than the saturation pressure, which is about 3.5 bar. Pressure differences between 0.1 and 0.5 bar were applied. Theoretical descriptions of the flow process are given, assuming that condensation may take place. For one description any heat transfer is neglected and the flow is assumed to be isothermal while for two other descriptions heat transfer and temperature variations due to condensation and evaporation are considered. For the experiments presented here the mass fluxes predicted by these three descriptions do not differ by a wide margin, e.g., the predictions vary between 1.02 and 1.25 kg m−2s−1. Qualitatively, the increase of the mass flux for a vapor close to saturation and the dependence of the mass flux on the flow direction is recovered by all three descriptions.

Název v anglickém jazyce

Experimental and numerical study of the flux of isobutane vapors near saturation through multi-layered ceramic membranes

Popis výsledku anglicky

The transport of vapors of isobutane near saturation through multi-layered asymmetric membranes is investigated experimentally and theoretically. The influence of the upstream state of the vapor, whether far or close to saturation, and of the orientation of the membrane on the mass flow rate is investigated. For a membrane with five layers, the mass flux increases from about 0.25 kg m−2s−1 for a vapor further from saturation to about 0.45 kgm−2s−1 for a vapor close to saturation. Also, close to saturation the mass flux in the flow direction from the separation layer to the support is up to 50% larger than in the opposite direction. The membranes consist of three to five layers, the support has a pore size of 3 μm, the finest separationnlayer has a pore size of 20 nm. Plane, circular membranes were tested in steady-state permeation experiments. The upstream pressure varied between about 0.3 times the saturation pressure and a value a few percent smaller than the saturation pressure, which is about 3.5 bar. Pressure differences between 0.1 and 0.5 bar were applied. Theoretical descriptions of the flow process are given, assuming that condensation may take place. For one description any heat transfer is neglected and the flow is assumed to be isothermal while for two other descriptions heat transfer and temperature variations due to condensation and evaporation are considered. For the experiments presented here the mass fluxes predicted by these three descriptions do not differ by a wide margin, e.g., the predictions vary between 1.02 and 1.25 kg m−2s−1. Qualitatively, the increase of the mass flux for a vapor close to saturation and the dependence of the mass flux on the flow direction is recovered by all three descriptions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/GC19-23760J" target="_blank" >GC19-23760J: Vývoj nových organicko-anorganických kompozitních materiálů na bázi dendrimerů jako efektivních sorbentů plynů a par</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

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

306

Číslo periodika v rámci svazku

1 Feb

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

122604

Kód UT WoS článku

000897447500004

EID výsledku v databázi Scopus

2-s2.0-85142154522