Happiness V. Ijije and Richard C. Lawrence and Nancy Julius Siambun and Sang, Mun Jeong and Daniel A. Jewell and Di, Hu and Chen, George Zheng (2014) Electro-deposition and re-oxidation of carbon in carbonate containing molten salts. Faraday Discussions, 172. pp. 105-116. ISSN 1359-6640
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Abstract
The electrochemical deposition and re-oxidation of solid carbon were studied in CO3(2-) ion-containing molten salts (e.g. CaCl2-CaCO3-LiCl-KCl and Li2CO3-K2CO3) at temperatures between 500 and 800 °C under Ar, CO2 or N2-CO2 atmospheres. The electrode reactions were investigated by thermodynamic analysis, cyclic voltammetry and chronopotentiometry in a three-electrode cell under various conditions. The findings suggest that the electro-reduction of CO3(2-) is dominated by carbon deposition on all three tested working electrodes (Ni, Pt and mild steel), but partial reduction to CO can also occur. Electro-re-oxidation of the deposited carbon in the same molten salts was investigated for potential applications in, for example, direct carbon fuel cells. A brief energy and cost analysis is given based on results from constant voltage electrolysis in a two-electrode cell.
| Item Type: | Article |
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| Keyword: | electrochemical deposition, re-oxidation, solid carbon, molten salts, thermodynamic analysis |
| Subjects: | Q Science > QD Chemistry |
| Department: | FACULTY > Faculty of Engineering |
| Depositing User: | MUNIRA BINTI MARASAN - |
| Date Deposited: | 23 Mar 2018 16:18 |
| Last Modified: | 23 Mar 2018 16:18 |
| URI: | https://eprints.ums.edu.my/id/eprint/19472 |
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