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6931603 
Journal Article 
Post-combustion CO2 capture with the HKUST-1 and MIL-101(Cr) metal-organic frameworks: Adsorption, separation and regeneration investigations 
Ye, S; Jiang, Xin; Ruan, LinWei; Liu, Bei; Wang, YiMin; Zhu, JunFa; Qiu, LG; , 
2013 
1 
Microporous and Mesoporous Materials
ISSN: 1387-1811 
ELSEVIER 
AMSTERDAM 
191-197 
WOS:000323689400025 
CO2 sequestration from combustion of fossil fuels, particularly coal, is an essential component of any serious plan to avoid catastrophic impacts of human-induced climate change. In this work, we describe a comparative investigation of post-combustion CO2 capture by using two representative metal-organic frameworks (MOFs), i.e. MIL-101(Cr) and [Cu-3(BTC)(2)](n) (HKUST-1, BTC = benzene-1,3,5-tricarboxylate). Adsorption of CO2 was investigated over a wide range of adsorption conditions (30-200 degrees C, 0-10 bar) on these MOFs. The results reveal that CO2 adsorption capacity of the MOFs investigated increases with increasing CO2 pressure while decreases with increasing the adsorption temperature. The CO2 capacities for MIL-101(Cr) and HKUST-1 were determined to be 8.07 and 7.19 mmol g(-1), respectively, at 30 degrees C and 10 bar. Particularly, dynamic column-breakthrough experiments for CO2 separation in a binary CO2/N-2 mixture with a composition typical of flue gas were investigated in a single-bed adsorption unit. Temperature swing adsorption (TSA) experiments were further investigated for regeneration of HKUST-1 and MIL-101(Cr). The results reveal that HKUST-1 has a higher CO2 adsorption capacity (1.82 mmol g(-1)) than MIL-101(Cr) (1.17 mmol g(-1)) under similar conditions, suggesting the HKUST-1 is more promise for separating CO2 in comparison with MIL-101(Cr). Furthermore, both TSA and vacuum swing adsorption (VSA) investigations were conducted for HKUST-1 regeneration, clearly indicating that TSA shows high efficiency for the MOF regeneration. However, VSA strategy was inefficient for regeneration of HKUST-1, which is due to the existence of coordinatively unsaturated metal active sites in the framework. (C) 2013 Elsevier Inc. All rights reserved.