期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 132, 期 3, 页码 305-310出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2009.11.026
关键词
Pillared-layer metal organic frameworks; Water tolerant; CO2 adsorption separation; Water vapor sorption; Pressure swing adsorption
The potential for two water tolerant three-dimensional pillared-layer metal organic frameworks (MOFs) M-2(BDC)(2)(Dabco) (M = Zn, Ni) to selectively adsorb and separate CO2 is considered. Isotherms for CO2, CH4 and N-2 were measured from 0 to 15 bar and for O-2 from 0 to 2.5 bar at temperatures between 25 and 105 degrees C. The isotherms give CO2 adsorption capacities of 13.7 and 12.5 mol/kg for Zn-2(BDC)(2)(Dabco) and Ni-2(BDC)(2)(Dabco) at 25 degrees C and 15 bar, respectively. Both materials have higher CO2/N-2 selectivity than CO2/CH4 selectivity and low heats of adsorption. The structures of the two MOFs are stable after O-2 and 30% relative humidity water vapor sorption at 25 degrees C, but collapsed after 60% relative humidity water vapor sorption at 25 degrees C. (C) 2010 CO2CRC Technologies Pty Ltd. Published by Elsevier Inc. All rights reserved.
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