The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks
The relatively stable MOFs Alfum, MIL-160, DUT-4, DUT-5, MIL-53-TDC, MIL-53, UiO-66, UiO-66-NH<sub>2</sub>, UiO-66(F)<sub>4</sub>, UiO-67, DUT-67, NH<sub>2</sub>-MIL-125, MIL-125, MIL-101(Cr), ZIF-8, ZIF-11 and ZIF-7 were studied for their C<sub>6</sub>...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/20/3614 |
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| author | Christian Jansen Nabil Assahub Alex Spieß Jun Liang Alexa Schmitz Shanghua Xing Serkan Gökpinar Christoph Janiak |
| author_facet | Christian Jansen Nabil Assahub Alex Spieß Jun Liang Alexa Schmitz Shanghua Xing Serkan Gökpinar Christoph Janiak |
| author_sort | Christian Jansen |
| collection | DOAJ |
| description | The relatively stable MOFs Alfum, MIL-160, DUT-4, DUT-5, MIL-53-TDC, MIL-53, UiO-66, UiO-66-NH<sub>2</sub>, UiO-66(F)<sub>4</sub>, UiO-67, DUT-67, NH<sub>2</sub>-MIL-125, MIL-125, MIL-101(Cr), ZIF-8, ZIF-11 and ZIF-7 were studied for their C<sub>6</sub> sorption properties. An understanding of the uptake of the larger C<sub>6</sub> molecules cannot simply be achieved with surface area and pore volume (from N<sub>2</sub> sorption) but involves the complex micropore structure of the MOF. The maximum adsorption capacity at p p<sub>0</sub><sup>−1</sup> = 0.9 was shown by DUT-4 for benzene, MIL-101(Cr) for cyclohexane and DUT-5 for <i>n</i>-hexane. In the low-pressure range from p p<sub>0</sub><sup>−1</sup> = 0.1 down to 0.05 the highest benzene uptake is given by DUT-5, DUT-67/UiO-67 and MIL-101(Cr), for cyclohexane and <i>n</i>-hexane by DUT-5, UiO-67 and MIL-101(Cr). The highest uptake capacity at p p<sub>0</sub><sup>−1</sup> = 0.02 was seen with MIL-53 for benzene, MIL-125 for cyclohexane and DUT-5 for <i>n</i>-hexane. DUT-5 and MIL-101(Cr) are the MOFs with the widest pore window openings/cross sections but the low-pressure uptake seems to be controlled by a complex combination of ligand and pore-size effect. IAST selectivities between the three binary mixtures show a finely tuned and difficult to predict interplay of pore window size with (critical) adsorptive size and possibly a role of electrostatics through functional groups such as NH<sub>2</sub>. |
| first_indexed | 2024-03-09T19:40:56Z |
| format | Article |
| id | doaj.art-e87d2f79207a4521afed0dcd027cf0cb |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T19:40:56Z |
| publishDate | 2022-10-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-e87d2f79207a4521afed0dcd027cf0cb2023-11-24T01:40:17ZengMDPI AGNanomaterials2079-49912022-10-011220361410.3390/nano12203614The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic FrameworksChristian Jansen0Nabil Assahub1Alex Spieß2Jun Liang3Alexa Schmitz4Shanghua Xing5Serkan Gökpinar6Christoph Janiak7Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyInstitut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyInstitut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyInstitut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyInstitut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyInstitut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyMicrotrac Retsch GmbH, Retsch-Allee 1-5, D-42781 Haan, GermanyInstitut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40225 Düsseldorf, GermanyThe relatively stable MOFs Alfum, MIL-160, DUT-4, DUT-5, MIL-53-TDC, MIL-53, UiO-66, UiO-66-NH<sub>2</sub>, UiO-66(F)<sub>4</sub>, UiO-67, DUT-67, NH<sub>2</sub>-MIL-125, MIL-125, MIL-101(Cr), ZIF-8, ZIF-11 and ZIF-7 were studied for their C<sub>6</sub> sorption properties. An understanding of the uptake of the larger C<sub>6</sub> molecules cannot simply be achieved with surface area and pore volume (from N<sub>2</sub> sorption) but involves the complex micropore structure of the MOF. The maximum adsorption capacity at p p<sub>0</sub><sup>−1</sup> = 0.9 was shown by DUT-4 for benzene, MIL-101(Cr) for cyclohexane and DUT-5 for <i>n</i>-hexane. In the low-pressure range from p p<sub>0</sub><sup>−1</sup> = 0.1 down to 0.05 the highest benzene uptake is given by DUT-5, DUT-67/UiO-67 and MIL-101(Cr), for cyclohexane and <i>n</i>-hexane by DUT-5, UiO-67 and MIL-101(Cr). The highest uptake capacity at p p<sub>0</sub><sup>−1</sup> = 0.02 was seen with MIL-53 for benzene, MIL-125 for cyclohexane and DUT-5 for <i>n</i>-hexane. DUT-5 and MIL-101(Cr) are the MOFs with the widest pore window openings/cross sections but the low-pressure uptake seems to be controlled by a complex combination of ligand and pore-size effect. IAST selectivities between the three binary mixtures show a finely tuned and difficult to predict interplay of pore window size with (critical) adsorptive size and possibly a role of electrostatics through functional groups such as NH<sub>2</sub>.https://www.mdpi.com/2079-4991/12/20/3614metal–organic frameworks (MOFs)zeolitic imidazolate frameworks (ZIFs)vapor adsorptionC<sub>6</sub> volatile organic compounds (VOCs)benzene adsorptioncyclohexane adsorption |
| spellingShingle | Christian Jansen Nabil Assahub Alex Spieß Jun Liang Alexa Schmitz Shanghua Xing Serkan Gökpinar Christoph Janiak The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks Nanomaterials metal–organic frameworks (MOFs) zeolitic imidazolate frameworks (ZIFs) vapor adsorption C<sub>6</sub> volatile organic compounds (VOCs) benzene adsorption cyclohexane adsorption |
| title | The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks |
| title_full | The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks |
| title_fullStr | The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks |
| title_full_unstemmed | The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks |
| title_short | The Complexity of Comparative Adsorption of C<sub>6</sub> Hydrocarbons (Benzene, Cyclohexane, <em>n</em>-Hexane) at Metal–Organic Frameworks |
| title_sort | complexity of comparative adsorption of c sub 6 sub hydrocarbons benzene cyclohexane em n em hexane at metal organic frameworks |
| topic | metal–organic frameworks (MOFs) zeolitic imidazolate frameworks (ZIFs) vapor adsorption C<sub>6</sub> volatile organic compounds (VOCs) benzene adsorption cyclohexane adsorption |
| url | https://www.mdpi.com/2079-4991/12/20/3614 |
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