CO2 separation of fluorinated 6FDA-based polyimides, performance-improved ZIF-incorporated mixed matrix membranes and gas permeability model evaluations.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F22%3A00564059" target="_blank" >RIV/67985858:_____/22:00564059 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0335804" target="_blank" >https://hdl.handle.net/11104/0335804</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2022.108611" target="_blank" >10.1016/j.jece.2022.108611</a>

Result language

angličtina

Original language name

CO2 separation of fluorinated 6FDA-based polyimides, performance-improved ZIF-incorporated mixed matrix membranes and gas permeability model evaluations.

Original language description

In this study, we compare a newly introduced high free volume fluorinated 6FDA-polyimide, namely 6FDA-bisP, with excellent gas separation properties (CO2 permeability, PCO2 of 35.3 Barrer, CO2/CH4 selectivity, alpha CO2/CH4 of 25.5) to the well-investigated, lower free volume 6FDA-ODA (PCO2 = 25.9 Barrer, alpha CO2/CH4 = 20.6). Their gas separation performances were improved in the form of mixed matrix membranes (MMMs) with size sieving zeolitic imidazolate framework (ZIF-8, particle range of <160 nm) addition between 5 and 20 wt% loadings. XRD, BET, FTIR, TGA, DSC, SEM, and TEM were used to characterize the nanoparticles and MMMs. Solid density was obtained from He pycnometry analysis (pressurized cycle test between 2 and 20 bar at 20 <degrees>C) to calculate the free fractional volume (FFV). Using an equimolar CO2 and CH4 mixture, gas separation performance was evaluated at a constant 5 bar, at 25 degrees C. The optimum loading was achieved at 15 wt% for 6FDA-bisP with MMM performance of PCO2 = 81.2 Barrer and alpha CO2/CH4 = 35.0, whereas 10 wt% for 6FDA-ODA (PCO2 = 42.2 Barrer, alpha CO2/CH4 = 44.8). The MMMs showed superior performances than the currently relevant polymers in industrial separation processes. Four different gas permeability models: Maxwell, Maxwell-Wagner-Sillar, Higuchi and Lewis Nielsen, were utilized to analyze the obtained data.

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

20402 - Chemical process engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Journal of Environmental Chemical Engineering

ISSN

2213-3437

e-ISSN

2213-3437

Volume of the periodical

10

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

108611

UT code for WoS article

000875614200004

EID of the result in the Scopus database

2-s2.0-85144301197