Table 4.
ICP-AES analysis of reaction mixture after stability tests of the 5% Pd-1% Au/SiO2 catalyst. Reaction conditions: T = 60 °C, mcat = 1g, C0 = 1 mol·dm-3, pH = 9, VO2 = 1 dm3·min−1.
| Number of Cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| X [%] | 100 | 96 | 97 | 90 | 92 | 99 | 96 | 94 | 99 | 94 |
| S [%] | 99 * | 99 * | 99 * | 99 * | 97 * | 96 * | 98 * | 97 * | 96 * | 98 * |
| Pd [ppm] 247.6 nm | 0.082 | 0.145 | 0.050 | 0.134 | 0.049 | 0.052 | 0.071 | 0.102 | 0.052 | 0.069 |
| Au [ppm] 242.8 nm | b.d.l. | b.d.l. | b.d.l. | b.d.l. | b.d.l. | b.d.l. | b.d.l. | b.d.l. | b.d.l. | b.d.l. |
b.d.l.: Below the detection limit. * Gluconic acid was the only product detected by HPLC with Gilson’s prepELS II detector.