Table 1 Performance of the continuous extraction process at different residence times
Residence time (min) | 50 | 100 | 150 |
|---|---|---|---|
Mean size of rice husk (μm) | 790 | 485 | 200 |
Silica extraction yield (%) | 52.8 | 69.1 | 86.0 |
Silica production (kg day−1) | 4.09 | 2.67 | 2.22 |
Energy consumption (MJ kg−1) | 51.6 | 47.7 | 47.4 |