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http://hdl.handle.net/10773/36832
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DC Field | Value | Language |
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dc.contributor.author | Starykevich, M. | pt_PT |
dc.contributor.author | Jamale, A. | pt_PT |
dc.contributor.author | Marques, F.M.B. | pt_PT |
dc.date.accessioned | 2023-04-03T09:42:55Z | - |
dc.date.available | 2023-04-03T09:42:55Z | - |
dc.date.issued | 2020-12-01 | - |
dc.identifier.issn | 0272-8842 | pt_PT |
dc.identifier.uri | http://hdl.handle.net/10773/36832 | - |
dc.description.abstract | Oxide + salt composites can be used in CO2 and NOx separation membranes, where high oxide-ion conductivity is crucial to improve performance. Pursuing this goal, the stability of three different bismuth oxide-based electrolytes (Cu + V, Y and Yb-doped) against molten alkali carbonates (Li, Na, K) or nitrates (Na, K) was tested firing them in the 450–550 °C temperature range, and with endurance tests up to 100 h. A well-known ceria-based composite was used as reference (CGO - Ce0.9Gd0.1O1.95). Oxides and composites were studied by X-ray diffraction, scanning electron microscopy and impedance spectroscopy (in air, 140–650 °C temperature range). Bi2Cu0.10V0.90O5.35 easily reacts with molten salts. Bi0.75Y0.25O1.5 and Bi0.75Yb0.25O1.5 have higher stability against molten carbonates and complete stability against molten nitrates. The Y-doped oxide stability against the molten carbonates was enhanced changing the molten salt composition (Y2O3 additions) and using lower firing temperatures. Above all, composites based on Y or Yb-doped Bi2O3 with molten alkali nitrates showed impressive 6× or 3× higher electrical conductivity at 290 °C, in air (4.88 × 10−2 and 2.41 × 10−2 S cm−1, respectively) than CGO-based composites (7.72 × 10−3 S cm−1), qualifying as promising materials for NOx separation membranes. | pt_PT |
dc.language.iso | eng | pt_PT |
dc.publisher | Elsevier | pt_PT |
dc.relation | POCI-01-0145- FEDER-016654 | pt_PT |
dc.relation | PTDC/CTM -CER/6732/2014 | pt_PT |
dc.relation | M-ERA.NET2 2016 | pt_PT |
dc.relation | MOCO3-0009/2016 | pt_PT |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PT | pt_PT |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50011%2F2020/PT | pt_PT |
dc.rights | openAccess | pt_PT |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | pt_PT |
dc.subject | Gas separation membranes | pt_PT |
dc.subject | Bismuth oxide | pt_PT |
dc.subject | Molten alkali carbonates | pt_PT |
dc.subject | Molten alkali nitrates | pt_PT |
dc.subject | Reactivity | pt_PT |
dc.subject | Impedance spectroscopy | pt_PT |
dc.title | Assessment of bismuth oxide-based electrolytes for composite gas separation membranes | pt_PT |
dc.type | article | pt_PT |
dc.description.version | published | pt_PT |
dc.peerreviewed | yes | pt_PT |
degois.publication.firstPage | 26705 | pt_PT |
degois.publication.issue | 17 | pt_PT |
degois.publication.lastPage | 26714 | pt_PT |
degois.publication.title | Ceramics International | pt_PT |
degois.publication.volume | 46 | pt_PT |
dc.identifier.doi | 10.1016/j.ceramint.2020.07.145 | pt_PT |
dc.identifier.essn | 1873-3956 | pt_PT |
Appears in Collections: | CICECO - Artigos DEMaC - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Assessment of bismuth oxide-based electrolytes for composite gas separation.pdf | 9.13 MB | Adobe PDF | View/Open |
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