Table 2.
Performance of reactors varying voltage delivery.
| Configuration∗ | Voltage delivered (V) | Current density (A/m2) | Power (mW) | Cathode potential (V vs. SHE) | Acetate production |
CE (%) | ηME (%) | ||
|---|---|---|---|---|---|---|---|---|---|
| (mmole/day) | (mmole/day/m2 cathode) | (g/kWh) | |||||||
| H-cell (1) | 3.0 | 0.71 ± 0.06 | 13.8 ± 1.1 | -0.65 | 0.45 ± 0.17 | 69 ± 26 | 81.4 ± 31.5 | 82 ± 19% | 33% |
| H-cell (2) | 3.5 | 0.87 ± 0.08 | 19.8 ± 1.8 | -0.73 | 0.54 ± 0.08 | 83 ± 12 | 68.3 ± 11.9 | 83 ± 11% | 29% |
| H-cell (3) | 5.0 | 1.70 ± 0.19 | 55.2 ± 6.2 | -0.74 | 1.07 ± 0.29 | 164 ± 45 | 48.5 ± 14.2 | 89 ± 12% | 21% |
| Abiotic H-cell | 3.5 | 0.77 ± 0.05 | 15.1 ± 3.3 | -0.79 | – | – | – | – | – |
| Membrane-less | 1.9 | 0.17 ± 0.04 | 3.9 ± 0.6 | -0.66 | 0.34 ± 0.05 | 28 ± 4 | 218.6 ± 64.3 | 105 ± 5% | 50% |
| 2.2 | 0.25 ± 0.06 | 6.9 ± 1.9 | -0.68 | 0.45 ± 0.02 | 38 ± 2 | 167.4 ± 37.1 | 79 ± 6% | 44% | |
| 2.5 | 0.46 ± 0.03 | 14.4 ± 0.7 | -0.81 | 0.43 ± 0.14 | 36 ± 12 | 77.6 ± 25.6 | 54 ± 10% | 39% | |
∗All reactors were run in duplicate.