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

2017; American Chemical Society; Volume: 9; Issue: 39 Linguagem: Inglês

10.1021/acsami.6b15250

1944-8252

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, Michael J. Zaworotko,

Carbon Dioxide Capture Technologies

A new hybrid ultramicroporous material, [Ni(1,4-di(pyridine-2-yl)benzene)2(Cr2O7)]n (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 C2H2 over CO2 (SAC). 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 SAC, TIFSIX-2-Cu-i and MIL-100(Fe), using a C2H2/CO2/He (10:5:85) gas mixture. Whereas CO2/C2H2 coadsorption by MIL-100(Fe) mitigated the purity of trapped C2H2, negligible coadsorption and high SAC were observed for DICRO-4-Ni-i and TIFSIX-2-Cu-i.