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Highly Selective Separation of C<sub>2</sub>H<sub>2</sub> from CO<sub>2</sub> by a New Dichromate-Based Hybrid Ultramicroporous Material

DOI

138

Citations

30

References

2017

Year

Hayley S. Scott, Mohana Shivanna, Alankriti Bajpai, David G. Madden, Kai‐Jie Chen, Tony Pham, Katherine A. Forrest, Adam Hogan, Brian Space, John J. Perry,
ACS Applied Materials & Interfaces

Abstract

A new hybrid ultramicroporous material, [Ni(1,4-di(pyridine-2-yl)benzene)<sub>2</sub>(Cr<sub>2</sub>O<sub>7</sub>)]<sub>n</sub> (DICRO-4-Ni-i), has been prepared and structurally characterized. Pure gas sorption isotherms and molecular modeling of sorbate-sorbent interactions imply strong selectivity for C<sub>2</sub>H<sub>2</sub> over CO<sub>2</sub> (S<sub>AC</sub>). Dynamic gas breakthrough coupled with temperature-programmed desorption experiments were conducted on DICRO-4-Ni-i and two other porous materials reported to exhibit high S<sub>AC</sub>, TIFSIX-2-Cu-i and MIL-100(Fe), using a C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub>/He (10:5:85) gas mixture. Whereas CO<sub>2</sub>/C<sub>2</sub>H<sub>2</sub> coadsorption by MIL-100(Fe) mitigated the purity of trapped C<sub>2</sub>H<sub>2</sub>, negligible coadsorption and high S<sub>AC</sub> were observed for DICRO-4-Ni-i and TIFSIX-2-Cu-i.

References

YearCitations

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