Enhanced gas separation performance of 6FDA-DAM based mixed matrix membranes by incorporating MOF UiO-66 and its derivatives

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43915952" target="_blank" >RIV/60461373:22310/18:43915952 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S037673881733569X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S037673881733569X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.memsci.2018.04.040" target="_blank" >10.1016/j.memsci.2018.04.040</a>

Result language

angličtina

Original language name

Enhanced gas separation performance of 6FDA-DAM based mixed matrix membranes by incorporating MOF UiO-66 and its derivatives

Original language description

Functionalization and post-synthetic modification (PSM) of metal-organic frameworks (MOFs) are two important routes to obtain MOFs with full potential in mixed matrix membrane (MMM) fabrication. We synthesized UiO-66 and two derivatives UiO-66-NH2 and UiO-66-NH-COCH3 with less than 50 nm particle size. The CO2 uptakes at 10 bar in the two functionalized UiO-66s were improved by 44% and 58%, respectively, with respect to the pristine solid. The MOF nanoparticles were incorporated into the highly permeable polymer 6FDA-DAM, making MMMs with 5-24 wt% particle loadings. All fillers and membranes were characterized accordingly, and their gas separation performances were evaluated by feeding CO2/CH4 equimolar mixtures at 2 bar pressure difference at 35 °C. CO2 permeability (PCO2) of pristine 6FDA-DAM (PCO2 = 997 ± 48 Barrer, αCO2/CH4 = 29 ± 3) increased by 92% with 20 wt% UiO-66 loading, while maintaining the CO2/CH4 selectivity. Improvements of 23% and 27% were observed for PCO2 with the same 20 wt% loading of UiO-66-NH2 and UiO-66-NH-COCH3, respectively. The αCO2/CH4 was improved up to 16% using both functionalized UiO-66 type MOFs. The best separation performance in this work was obtained with 14 wt% UiO-66 MMM (PCO2 = 1912 ± 115 Barrer, αCO2/CH4 = 31 ± 1), 16 wt% UiO-66-NH2 MMM (PCO2 = 1223 ± 23 Barrer, αCO2/CH4 = 30 ± 1) and 16 wt% UiO-66-NH-COCH3 MMM (PCO2 = 1263 ± 42 Barrer, αCO2/CH4 = 33 ± 1) at 2 bar feed pressure difference. The measurement was also conducted with various binary compositions (CO2 = 10 - 90%), both at low and high pressures up to 40 bar at 35 °C, showing no pressure-related CO2-induced plasticization. The atomistic modelling for the MOF/polymer interface was consistent with a moderate MOF surface coverage by 6FDA-DAM which did not play a detrimental role in the membrane performance. © 2018 Elsevier B.V.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

20402 - Chemical process engineering

Project

<a href="/en/project/LO1613" target="_blank" >LO1613: Future materials</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Journal of Membrane Science

ISSN

0376-7388

e-ISSN

—

Volume of the periodical

558

Issue of the periodical within the volume

15 July 2018

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

64-77

UT code for WoS article

000432588600008

EID of the result in the Scopus database

2-s2.0-85046794625