Table 1.
Comparison of total formate formation, accumulated charges, formate production rates, charge consumption rates and calculated average %FE in each cycle of three MECs.
|
System |
|
Cycle 1 (30 days) |
Cycle 2 (27 days) |
Cycle 3 (25days) |
Cycle 4 (31 days) |
57 days |
Overall |
|---|---|---|---|---|---|---|---|
|
MEC 1 |
[formate] / mm |
2.0 |
1.9 |
– |
– |
3.9 |
3.9 |
|
|
Q / C |
1086.4 |
1376.3 |
– |
– |
2462.7 |
2462.7 |
|
|
production rate / μm day−1 |
66.7 |
71.9 |
– |
– |
68.6 |
68.6 |
|
|
Q rate / C day−1 |
35.3 |
51.9 |
– |
– |
43.2 |
43.2 |
|
|
%FE |
3 |
2 |
– |
– |
2 |
2 |
|
MEC 2 |
[formate] / mm |
2.9 |
2.4 |
1.0 |
– |
5.3 |
6.3 |
|
|
Q / C |
1432.3 |
1997.6 |
2588.1 |
– |
3429.9 |
6018.0 |
|
|
production rate / μm day−1 |
96.9 |
99.8 |
40.7 |
– |
93.7 |
77.3 |
|
|
Q rate / C day−1 |
49.8 |
71.7 |
102.2 |
– |
60.2 |
73.4 |
|
|
%FE |
8 |
5 |
1 |
– |
6 |
4 |
|
MEC 3 |
[formate] / mm |
1.2 |
3.5 |
2.1 |
1.3 |
4.7 |
8.1 |
|
|
Q / C |
2466.9 |
1793.7 |
1920.6 |
2231.2 |
4260.6 |
8412.5 |
|
|
production rate / μm day−1 |
42.1 |
133.5 |
88.8 |
34.4 |
81.7 |
67.8 |
|
|
Q rate / C day−1 |
80.1 |
63.0 |
78.3 |
62.9 |
74.7 |
71.9 |
|
|
%FE |
2 |
8 |
4 |
2 |
4 |
4 |