Complexity behind CO2 capture on NH2-MIL-53(Al)

Eli Stavitski; Evgeny A. Pidko; Sarah Couck; Tom Remy; Emiel J.M. Hensen; Bert M. Weckhuysen; Joeri Denayer; Jorge Gascon; Freek Kapteijn

doi:10.1021/la1045207

Complexity behind CO₂ capture on NH₂-MIL-53(Al)

Eli Stavitski, Evgeny A. Pidko, Sarah Couck, Tom Remy, Emiel J.M. Hensen, Bert M. Weckhuysen, Joeri Denayer, Jorge Gascon^*, Freek Kapteijn

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

264 Scopus citations

Abstract

Some Metal Organic Frameworks (MOFs) show excellent performance in extracting carbon dioxide from different gas mixtures. The origin of their enhanced separation ability is not clear yet. Herein, we present a combined experimental and theoretical study of the amino-functionalized MIL-53(Al) to elucidate the mechanism behind its unusual high efficiency in CO₂ capture. Spectroscopic and DFT studies point out only an indirect role of amine moieties. In contrast to other amino-functionalized CO₂ sorbents, no chemical bond between CO₂ and the NH₂ groups of the structure is formed. We demonstrate that the functionalization modulates the "breathing" behavior of the material, that is, the flexibility of the framework and its capacity to alter the structure upon the introduction of specific adsorbates. The absence of strong chemical interactions with CO ₂ is of high importance for the overall performance of the adsorbent, since full regeneration can be achieved within minutes under very mild conditions, demonstrating the high potential of this type of adsorbents for PSA like systems.

Original language	English (US)
Pages (from-to)	3970-3976
Number of pages	7
Journal	LANGMUIR
Volume	27
Issue number	7
DOIs	https://doi.org/10.1021/la1045207
State	Published - Apr 5 2011
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la1045207

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title = "Complexity behind CO2 capture on NH2-MIL-53(Al)",

abstract = "Some Metal Organic Frameworks (MOFs) show excellent performance in extracting carbon dioxide from different gas mixtures. The origin of their enhanced separation ability is not clear yet. Herein, we present a combined experimental and theoretical study of the amino-functionalized MIL-53(Al) to elucidate the mechanism behind its unusual high efficiency in CO2 capture. Spectroscopic and DFT studies point out only an indirect role of amine moieties. In contrast to other amino-functionalized CO2 sorbents, no chemical bond between CO2 and the NH2 groups of the structure is formed. We demonstrate that the functionalization modulates the {"}breathing{"} behavior of the material, that is, the flexibility of the framework and its capacity to alter the structure upon the introduction of specific adsorbates. The absence of strong chemical interactions with CO 2 is of high importance for the overall performance of the adsorbent, since full regeneration can be achieved within minutes under very mild conditions, demonstrating the high potential of this type of adsorbents for PSA like systems.",

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AU - Stavitski, Eli

AU - Pidko, Evgeny A.

AU - Couck, Sarah

AU - Remy, Tom

AU - Hensen, Emiel J.M.

AU - Weckhuysen, Bert M.

AU - Denayer, Joeri

AU - Gascon, Jorge

AU - Kapteijn, Freek

PY - 2011/4/5

Y1 - 2011/4/5

N2 - Some Metal Organic Frameworks (MOFs) show excellent performance in extracting carbon dioxide from different gas mixtures. The origin of their enhanced separation ability is not clear yet. Herein, we present a combined experimental and theoretical study of the amino-functionalized MIL-53(Al) to elucidate the mechanism behind its unusual high efficiency in CO2 capture. Spectroscopic and DFT studies point out only an indirect role of amine moieties. In contrast to other amino-functionalized CO2 sorbents, no chemical bond between CO2 and the NH2 groups of the structure is formed. We demonstrate that the functionalization modulates the "breathing" behavior of the material, that is, the flexibility of the framework and its capacity to alter the structure upon the introduction of specific adsorbates. The absence of strong chemical interactions with CO 2 is of high importance for the overall performance of the adsorbent, since full regeneration can be achieved within minutes under very mild conditions, demonstrating the high potential of this type of adsorbents for PSA like systems.

AB - Some Metal Organic Frameworks (MOFs) show excellent performance in extracting carbon dioxide from different gas mixtures. The origin of their enhanced separation ability is not clear yet. Herein, we present a combined experimental and theoretical study of the amino-functionalized MIL-53(Al) to elucidate the mechanism behind its unusual high efficiency in CO2 capture. Spectroscopic and DFT studies point out only an indirect role of amine moieties. In contrast to other amino-functionalized CO2 sorbents, no chemical bond between CO2 and the NH2 groups of the structure is formed. We demonstrate that the functionalization modulates the "breathing" behavior of the material, that is, the flexibility of the framework and its capacity to alter the structure upon the introduction of specific adsorbates. The absence of strong chemical interactions with CO 2 is of high importance for the overall performance of the adsorbent, since full regeneration can be achieved within minutes under very mild conditions, demonstrating the high potential of this type of adsorbents for PSA like systems.

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Complexity behind CO₂ capture on NH₂-MIL-53(Al)

Abstract

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