Hydrogen storage in ion-exchanged zeolites
The hydrogen storage properties of zeolites X, Y, A and Rho containing various exchangeable cations have been investigated. All hydrogen storage capacities were measured at a temperature of -196° C and a pressure range of 0-15 bar, using a constant pressure thermogravimetric analyser. The results sh...
| Main Authors: | , , , , , , , , |
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| Format: | Conference item |
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2005
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| _version_ | 1797050231166074880 |
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| author | Langmi, H Book, D Walton, A Johnson, SR Al-Mamouri, M Speight, J Edwards, P Harris, I Anderson, P |
| author_facet | Langmi, H Book, D Walton, A Johnson, SR Al-Mamouri, M Speight, J Edwards, P Harris, I Anderson, P |
| author_sort | Langmi, H |
| collection | OXFORD |
| description | The hydrogen storage properties of zeolites X, Y, A and Rho containing various exchangeable cations have been investigated. All hydrogen storage capacities were measured at a temperature of -196° C and a pressure range of 0-15 bar, using a constant pressure thermogravimetric analyser. The results show that, zeolites exhibit diverse behaviour with respect to hydrogen uptake, dependent on both the framework structure and the nature of the cations present. A major factor influencing uptake is the available void space: in zeolites A and Rho pore blocking by large extraframework cations is a major factor restricting hydrogen uptake, but in zeolites X and Y, blocking does not occur. This study also suggests that cations may act as binding sites for hydrogen molecules. For zeolites X and Y, hydrogen uptake relates closely to the measured BET surface area. The highest gravimetric storage capacity of 2.19 wt.% was obtained for CaX. Volumetric storage densities of up to 31.0 kg H 2/m3 (143 H2 molecules/unit cell) and 30.2 kg H2/m3 (144 H2 molecules/unit cell) were achieved for CaX and KX, respectively. © 2005 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-06T18:02:06Z |
| format | Conference item |
| id | oxford-uuid:0020c59f-d605-447b-9ec1-e052de8c7cce |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:02:06Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:0020c59f-d605-447b-9ec1-e052de8c7cce2022-03-26T08:27:58ZHydrogen storage in ion-exchanged zeolitesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:0020c59f-d605-447b-9ec1-e052de8c7cceSymplectic Elements at Oxford2005Langmi, HBook, DWalton, AJohnson, SRAl-Mamouri, MSpeight, JEdwards, PHarris, IAnderson, PThe hydrogen storage properties of zeolites X, Y, A and Rho containing various exchangeable cations have been investigated. All hydrogen storage capacities were measured at a temperature of -196° C and a pressure range of 0-15 bar, using a constant pressure thermogravimetric analyser. The results show that, zeolites exhibit diverse behaviour with respect to hydrogen uptake, dependent on both the framework structure and the nature of the cations present. A major factor influencing uptake is the available void space: in zeolites A and Rho pore blocking by large extraframework cations is a major factor restricting hydrogen uptake, but in zeolites X and Y, blocking does not occur. This study also suggests that cations may act as binding sites for hydrogen molecules. For zeolites X and Y, hydrogen uptake relates closely to the measured BET surface area. The highest gravimetric storage capacity of 2.19 wt.% was obtained for CaX. Volumetric storage densities of up to 31.0 kg H 2/m3 (143 H2 molecules/unit cell) and 30.2 kg H2/m3 (144 H2 molecules/unit cell) were achieved for CaX and KX, respectively. © 2005 Elsevier B.V. All rights reserved. |
| spellingShingle | Langmi, H Book, D Walton, A Johnson, SR Al-Mamouri, M Speight, J Edwards, P Harris, I Anderson, P Hydrogen storage in ion-exchanged zeolites |
| title | Hydrogen storage in ion-exchanged zeolites |
| title_full | Hydrogen storage in ion-exchanged zeolites |
| title_fullStr | Hydrogen storage in ion-exchanged zeolites |
| title_full_unstemmed | Hydrogen storage in ion-exchanged zeolites |
| title_short | Hydrogen storage in ion-exchanged zeolites |
| title_sort | hydrogen storage in ion exchanged zeolites |
| work_keys_str_mv | AT langmih hydrogenstorageinionexchangedzeolites AT bookd hydrogenstorageinionexchangedzeolites AT waltona hydrogenstorageinionexchangedzeolites AT johnsonsr hydrogenstorageinionexchangedzeolites AT almamourim hydrogenstorageinionexchangedzeolites AT speightj hydrogenstorageinionexchangedzeolites AT edwardsp hydrogenstorageinionexchangedzeolites AT harrisi hydrogenstorageinionexchangedzeolites AT andersonp hydrogenstorageinionexchangedzeolites |