Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents
The transition to a hydrogen economy requires the development of cost-effective methods for purifying hydrogen from CO. In this study, we explore the possibilities of Cu/ZSM-5 as an adsorbent for this purpose. Samples obtained by cation exchange from aqueous solution (AE) and solid-state exchange wi...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/1/96 |
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| author | Mihail Mihaylov Elena Ivanova Videlina Zdravkova Stanislava Andonova Nikola Drenchev Kristina Chakarova Radoslav Kefirov Rositsa Kukeva Radostina Stoyanova Konstantin Hadjiivanov |
| author_facet | Mihail Mihaylov Elena Ivanova Videlina Zdravkova Stanislava Andonova Nikola Drenchev Kristina Chakarova Radoslav Kefirov Rositsa Kukeva Radostina Stoyanova Konstantin Hadjiivanov |
| author_sort | Mihail Mihaylov |
| collection | DOAJ |
| description | The transition to a hydrogen economy requires the development of cost-effective methods for purifying hydrogen from CO. In this study, we explore the possibilities of Cu/ZSM-5 as an adsorbent for this purpose. Samples obtained by cation exchange from aqueous solution (AE) and solid-state exchange with CuCl (SE) were characterized by in situ EPR and FTIR, H<sub>2</sub>-TPR, CO-TPD, etc. The AE samples possess mainly isolated Cu<sup>2+</sup> cations not adsorbing CO. Reduction generates Cu<sup>+</sup> sites demonstrating different affinity to CO, with the strongest centres desorbing CO at about 350 °C. The SE samples have about twice higher Cu/Al ratios, as one H<sup>+</sup> is exchanged with one Cu<sup>+</sup> cation. Although some of the introduced Cu<sup>+</sup> sites are oxidized to Cu<sup>2+</sup> upon contact with air, they easily recover their original oxidation state after thermal treatment in vacuum or under inert gas stream. In addition, these Cu<sup>+</sup> centres regenerate at relatively low temperatures. It is important that water does not block the CO adsorption sites because of the formation of Cu<sup>+</sup>(CO)(H<sub>2</sub>O)<sub>x</sub> complexes. Dynamic adsorption studies show that Cu/ZSM-5 selectively adsorbs CO in the presence of hydrogen. The results indicate that the SE samples are very perspective materials for purification of H<sub>2</sub> from CO. |
| first_indexed | 2024-03-10T03:31:12Z |
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| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T03:31:12Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-c8d898cc7a3345119a9f67d52d5fee6e2023-11-23T11:56:40ZengMDPI AGMolecules1420-30492021-12-012719610.3390/molecules27010096Purification of Hydrogen from CO with Cu/ZSM-5 AdsorbentsMihail Mihaylov0Elena Ivanova1Videlina Zdravkova2Stanislava Andonova3Nikola Drenchev4Kristina Chakarova5Radoslav Kefirov6Rositsa Kukeva7Radostina Stoyanova8Konstantin Hadjiivanov9Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaThe transition to a hydrogen economy requires the development of cost-effective methods for purifying hydrogen from CO. In this study, we explore the possibilities of Cu/ZSM-5 as an adsorbent for this purpose. Samples obtained by cation exchange from aqueous solution (AE) and solid-state exchange with CuCl (SE) were characterized by in situ EPR and FTIR, H<sub>2</sub>-TPR, CO-TPD, etc. The AE samples possess mainly isolated Cu<sup>2+</sup> cations not adsorbing CO. Reduction generates Cu<sup>+</sup> sites demonstrating different affinity to CO, with the strongest centres desorbing CO at about 350 °C. The SE samples have about twice higher Cu/Al ratios, as one H<sup>+</sup> is exchanged with one Cu<sup>+</sup> cation. Although some of the introduced Cu<sup>+</sup> sites are oxidized to Cu<sup>2+</sup> upon contact with air, they easily recover their original oxidation state after thermal treatment in vacuum or under inert gas stream. In addition, these Cu<sup>+</sup> centres regenerate at relatively low temperatures. It is important that water does not block the CO adsorption sites because of the formation of Cu<sup>+</sup>(CO)(H<sub>2</sub>O)<sub>x</sub> complexes. Dynamic adsorption studies show that Cu/ZSM-5 selectively adsorbs CO in the presence of hydrogen. The results indicate that the SE samples are very perspective materials for purification of H<sub>2</sub> from CO.https://www.mdpi.com/1420-3049/27/1/96adsorptionbreakthrough curvescarbon monoxideCu/ZSM-5FTIR spectroscopyhydrogen purification |
| spellingShingle | Mihail Mihaylov Elena Ivanova Videlina Zdravkova Stanislava Andonova Nikola Drenchev Kristina Chakarova Radoslav Kefirov Rositsa Kukeva Radostina Stoyanova Konstantin Hadjiivanov Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents Molecules adsorption breakthrough curves carbon monoxide Cu/ZSM-5 FTIR spectroscopy hydrogen purification |
| title | Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents |
| title_full | Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents |
| title_fullStr | Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents |
| title_full_unstemmed | Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents |
| title_short | Purification of Hydrogen from CO with Cu/ZSM-5 Adsorbents |
| title_sort | purification of hydrogen from co with cu zsm 5 adsorbents |
| topic | adsorption breakthrough curves carbon monoxide Cu/ZSM-5 FTIR spectroscopy hydrogen purification |
| url | https://www.mdpi.com/1420-3049/27/1/96 |
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