title: Stability effects on CO2 adsorption for the DOBDC series of metal-organic frameworks.
abstract: Metal-organic frameworks with unsaturated metal centers in their crystal structures, such as Ni/DOBDC and Mg/DOBDC, are promising adsorbents for carbon dioxide capture from flue gas due to their high CO(2) capacities at subatmospheric pressures. However, stability is a critical issue for their application. In this paper, the stabilities of Ni/DOBDC and Mg/DOBDC are investigated. Effects of steam conditioning, simulated flue gas conditioning, and long-term storage on CO(2) adsorption capacities are considered. Results show that Ni/DOBDC can maintain its CO(2) capacity after steam conditioning and long-term storage, whereas Mg/DOBDC does not. Nitrogen isotherms for Mg/DOBDC show a drop in surface area after steaming, corresponding to the decrease in CO(2) adsorption, which may be caused by a reduction of unsaturated metal centers in its structure. Conditioning with dry simulated flue gas at room temperature only slightly affects CO(2) adsorption in Ni/DOBDC. However, introducing water vapor into the simulated flue gas further reduces the CO(2) capacity of Ni/DOBDC.
authors.affiliation: Department of Chemical and Biomolecular Engineering, Vanderbilt University, VU Station B 351604, Nashville, Tennessee 37235-1604, USA.
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: Annabelle I
authors.initials: AI
authors.lastname: Benin
authors.forename: Amanda M B
authors.initials: AM
authors.lastname: Furtado
authors.forename: Paulina
authors.initials: P
authors.lastname: Jakubczak
authors.forename: Richard R
authors.initials: RR
authors.lastname: Willis
authors.forename: M Douglas
authors.initials: MD
authors.lastname: LeVan