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Metal-organic framework based mixed matrix membranes: a solution for highly efficient CO2 capture?

ABSTRACT: The field of metal-organic framework based mixed matrix membranes (M(4)s) is critically reviewed, with special emphasis on their application in CO2 capture during energy generation. After introducing the most relevant parameters affecting membrane performance, we define targets in terms of selectivity and productivity based on existing literature on process design for pre- and post-combustion CO2 capture. Subsequently, the state of the art in M(4)s is reviewed against these targets. Because final application of these membranes will only be possible if thin separation layers can be produced, the latest advances in the manufacture of M(4) hollow fibers are discussed. Finally, the recent efforts in understanding the separation performance of these complex composite materials and future research directions are outlined.

SUBMITTER: Seoane B

PROVIDER: S-EPMC4445399 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature

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Metal-organic framework based mixed matrix membranes: a solution for highly efficient CO2 capture?

Seoane Beatriz B Coronas Joaquin J Gascon Ignacio I Etxeberria Benavides Miren M Karvan Oğuz O Caro Jürgen J Kapteijn Freek F Gascon Jorge J

Chemical Society reviews 20150401 8

The field of metal-organic framework based mixed matrix membranes (M(4)s) is critically reviewed, with special emphasis on their application in CO2 capture during energy generation. After introducing the most relevant parameters affecting membrane performance, we define targets in terms of selectivity and productivity based on existing literature on process design for pre- and post-combustion CO2 capture. Subsequently, the state of the art in M(4)s is reviewed against these targets. Because fina ...[more]

PMID: 25692487

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Project description:Metal-organic frameworks (MOFs) have been an excellent platform for carbon dioxide reduction reactions (CO2RR). In this work, the feasibility of electrochemical reduction of CO2 to obtain C2-deep value-added products was investigated by the preparation of Mg-containing MOF-74 samples combined with transition metal cations (Ni2+, Co2+ and Zn2+). The prepared MOFs were used as electrocatalysts in CO2RR. Chronoamperometric analysis coupled to ATR-FTIR spectroscopy was employed to characterize the CO2 reduction products and subsequently via 1H NMR. Although an isostructural crystalline structure was observed in all synthesized MOFs, the pore diameter distribution was significantly affected due to the Mg coordination along with each transition metal nuclei with the organic ligand to form the MOF-74. Our results showed that Mg-containing MOF-74 electrocatalysts combined with Ni, Co and Zn ions successfully reduced CO2 to C2-deep products, while the monometallic Mg-MOF-74 showed only CO2 mineralization. An ester acetate, isopropyl alcohol, and formic acid were produced by Mg/Ni-MOF-74; isopropyl alcohol was provided by Mg/Co-MOF-74, and ethanol was generated by Mg/Zn-MOF-74. We observed that the change of the transition cation was a key factor in the selectivity of the obtained products, while the degree of Mg ions effectively incorporated into the MOF structure tuned the porosity and the electrocatalytic activity. Among them, Mg/Zn-MFOF-74 showed the highest Mg content loaded after synthesis and thus the most favorable electrocatalytic behavior towards CO2 reduction. Highlights • CO2-derived C2-deep reduction products were obtained by Mg-containing MOF-74 bimetallic electrocatalysts.• Mg-containing MOF-74 bimetallic electrocatalysts reduced CO2 to ester acetate, isopropanol, formic acid, and ethanol.• Mg/Zn-MOF-74 displayed the highest current density at a lower onset potential in CO2-saturated electrolyte.• The pore network could be tuned by the effective Mg content on a MOF-74 bimetallic sample.• Mg/Zn-MOF-74 showed the highest Mg content among all bimetallic electrocatalysts after the synthesis.

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Metal-organic framework based mixed matrix membranes: a solution for highly efficient CO2 capture?

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Metal-organic framework based mixed matrix membranes: a solution for highly efficient CO2 capture?

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