Table 4
Summary of the filtration experiments results.
Filtration | Aging | Pre-filtration | Filtration temperature (°C) | Filter mesh (μm) | FR250 | Average viscosity loss (%) |
---|---|---|---|---|---|---|
1 | No | No | Ambient (~25 ) | 8 | 106 | 65.9 |
2 | 24 h at 90 °C | No | 90 | 8 | 2.91 | 21.2 |
3 | 24 h at 90 °C | No | 90 | 1.2 | 5.37 | 70.1 |
4 | 24 h at 90 °C | 8 μm2 * | 90 | 1.2 | 1.51 | 21.3 |