Hyper-Cross-linked Porous Organic Frameworks with Ultramicropores for Selective Xenon Capture

Journal Article · Wed Apr 10 00:00:00 EDT 2019 · ACS Applied Materials & Interfaces

DOI:https://doi.org/10.1021/acsami.9b01619· OSTI ID:1530599

Chakraborty, Debanjan ^[1]; Nandi, Shyamapada ^[1]; Sinnwell, Michael A.  ^[2]; Liu, Jian ^[3]; Kushwaha, Rinku ^[4]; Thallapally, Praveen K.  ^[2]; Vaidhyanathan, Ramanathan ^[1]

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1. Indian Institute of Science Education and Research
2. BATTELLE (PACIFIC NW LAB)
3. UNIVERSITY PROGRAMS
4. IISER

Exceptionally stable ultra-microporous C-C bonded porous organic framework (IISERP-POF6, 7, 8) have been prepared using simple Friedel-Crafts reaction. These polymers exhibit permanent porosity with a BET surface area of 645-800 m2/g. Xe/Kr adsorptive separation has been carried out with these polymers and they display selective Xe capture (s(Xe/Kr)) = 6.7, 6.32, 6.33) at 298K and 1 bar pressure. Interestingly, these polymers also show remarkable Xe/N2 (s(Xe/N2)) = 200, 180, 160 at 298K and 1 bar) and Xe/CO2 selectivity (s(Xe/CO2)) = 5.63, 7.4, 5.62) for a 1:99 composition of Xe:N2/Xe:CO2. Selective removal of Xe at such low concentrations is extremely challenging; the observed selectivities are higher compared to those observed in porous carbons and MOFs. Breakthrough studies were performed using the composition relevant to nuclear off-gas mixture with the polymers and we find that the polymers hold Xe for a longer time in the column which illustrates the Xe/Kr separation performance under dynamic condition.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1530599
• Report Number(s): PNNL-SA-140970
• Journal Information: ACS Applied Materials & Interfaces, Vol. 11, Issue 14
• Country of Publication: United States
• Language: English

Related Subjects

Polymers
Xenon
Adsorption
separation