Electrochemical Reduction of Nitrite to Ammonia for Use in a Bioreactor
Sahin, A; Lin, W; Khunjar, WO; Chandran, K; Banta, S; West, AC
| HERO ID | 1565564 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | Electrochemical Reduction of Nitrite to Ammonia for Use in a Bioreactor |
| Authors | Sahin, A; Lin, W; Khunjar, WO; Chandran, K; Banta, S; West, AC |
| Journal | Journal of Electrochemical Society |
| Volume | 160 |
| Issue | 1 |
| Page Numbers | G19-G26 |
| Abstract | One novel means of biofuel production requires the reduction of nitrite ions to produce ammonia (which serves as an electron source for genetically-modified, carbon dioxide-fixing bacteria). The feasibility of this process depends on the performance of both the electrochemical reactor and a coupled bioreactor. We report on characterization of the electrochemical process involving nitrite reduction to ammonia in buffered electrolytes in the pH range between 6.0 and 8.0. A limiting current plateau was observed and determined to be due to flux of phosphate buffer (the primary source of protons) to the electrode surface. Importantly to the development of a sustainable process, current efficiencies of nitrite reduction to ammonia of 100% on both nickel and glassy carbon electrodes are possible. A divided flow-by porous electrode cell was designed as a proof of principle by coupling it to the bioreactor. It was observed that the overpotential of glassy carbon cathode decreased by similar to 500 mV over 10 days which would correspond to 24% decrease in power requirements for the electrochemical reactor. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.042301jes] All rights reserved. |
| Doi | 10.1149/2.042301jes |
| Wosid | WOS:000313578400057 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000313578400057 |
| Is Public | Yes |