Details
| Original language | English |
|---|---|
| Pages (from-to) | 16156-16160 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 58 |
| Issue number | 45 |
| Early online date | 25 Oct 2019 |
| Publication status | Published - 4 Nov 2019 |
Abstract
Oriented and penetrating molecular sieving membranes display enhanced separation performance. A polyimide (PI) solution containing highly dispersed ZIF-7(III) sheets in CHCl3 was deposited on a glass side and subjected to flat-scraping with a membrane fabricator. In this way we developed a novel oriented and penetrating ZIF-7@PI mixed matrix membrane (MMM) with 50 wt. % ZIF-7 loading. Because the height of the ZIF-7 sheets (5 μm) is higher than the film thickness, every ZIF-7 sheet penetrates both surfaces of the polyimide film. Since the ZIF-7 channels are the dominant pathway for gas permeation, the ZIF-7@PI MMM displays a high molecular sieve performance for the separation of H2 (0.29 nm) from larger gas molecules. At 100 °C and 2 bar, the mixture separation factors of H2/CO2 and H2/CH4 are 91.5 and 128.4, with a high H2 permeance of about 3.0×10−7 mol m−2 s−1 Pa−1, which is promising for hydrogen separation by molecular sieving.
Keywords
- gas separation, metal–organic frameworks, mixed matrix membranes, molecular sieves, ZIF-7
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
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In: Angewandte Chemie - International Edition, Vol. 58, No. 45, 04.11.2019, p. 16156-16160.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Polymer Composite Membrane with Penetrating ZIF-7 Sheets Displays High Hydrogen Permselectivity
AU - Ma, Xixi
AU - Wu, Xiaocao
AU - Caro, Jürgen
AU - Huang, Aisheng
N1 - Funding Information: We gratefully acknowledge the financial support by the National Natural Science Foundation of China (21761132003) and Fundamental Research Funds for the Central Universities (40500-20101-222093). Prof. Dr. Lidong Zhang in ECNU is thanked for help in measuring the mechanical properties of the polyimide membrane and ZIF-7@PI MMM.
PY - 2019/11/4
Y1 - 2019/11/4
N2 - Oriented and penetrating molecular sieving membranes display enhanced separation performance. A polyimide (PI) solution containing highly dispersed ZIF-7(III) sheets in CHCl3 was deposited on a glass side and subjected to flat-scraping with a membrane fabricator. In this way we developed a novel oriented and penetrating ZIF-7@PI mixed matrix membrane (MMM) with 50 wt. % ZIF-7 loading. Because the height of the ZIF-7 sheets (5 μm) is higher than the film thickness, every ZIF-7 sheet penetrates both surfaces of the polyimide film. Since the ZIF-7 channels are the dominant pathway for gas permeation, the ZIF-7@PI MMM displays a high molecular sieve performance for the separation of H2 (0.29 nm) from larger gas molecules. At 100 °C and 2 bar, the mixture separation factors of H2/CO2 and H2/CH4 are 91.5 and 128.4, with a high H2 permeance of about 3.0×10−7 mol m−2 s−1 Pa−1, which is promising for hydrogen separation by molecular sieving.
AB - Oriented and penetrating molecular sieving membranes display enhanced separation performance. A polyimide (PI) solution containing highly dispersed ZIF-7(III) sheets in CHCl3 was deposited on a glass side and subjected to flat-scraping with a membrane fabricator. In this way we developed a novel oriented and penetrating ZIF-7@PI mixed matrix membrane (MMM) with 50 wt. % ZIF-7 loading. Because the height of the ZIF-7 sheets (5 μm) is higher than the film thickness, every ZIF-7 sheet penetrates both surfaces of the polyimide film. Since the ZIF-7 channels are the dominant pathway for gas permeation, the ZIF-7@PI MMM displays a high molecular sieve performance for the separation of H2 (0.29 nm) from larger gas molecules. At 100 °C and 2 bar, the mixture separation factors of H2/CO2 and H2/CH4 are 91.5 and 128.4, with a high H2 permeance of about 3.0×10−7 mol m−2 s−1 Pa−1, which is promising for hydrogen separation by molecular sieving.
KW - gas separation
KW - metal–organic frameworks
KW - mixed matrix membranes
KW - molecular sieves
KW - ZIF-7
UR - http://www.scopus.com/inward/record.url?scp=85073927253&partnerID=8YFLogxK
U2 - 10.1002/anie.201911226
DO - 10.1002/anie.201911226
M3 - Article
C2 - 31509315
AN - SCOPUS:85073927253
VL - 58
SP - 16156
EP - 16160
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 45
ER -