Table 1 Pretreatment liquids and contents of BQ and DMBQ
Pretreatment liquid | Feedstock | Pretreatment catalyst and conditions | [BQ] (mg/l) | [DMBQ] (mg/l) |
|---|---|---|---|---|
PL1 | Corn cobs | H2SO4, 186 °C, 6.4 min | 2.006 ± 0.231 | 0.230 ± 0.028 |
PL2 | Sugarcane bagasse | SO2, 188 °C, 10 min | 6.138 ± 0.838 | <LOD |
PL3 | Cassava stems | H2SO4, 170 °C, 20 min | 5.167 ± 1.454 | 0.200 ± 0.049 |
PL4 | Norway spruce | SO2, 204 °C, 7-8 min | 4.156 ± 0.381 | <LOD |
PL5 | Birch | SO2, 190 °C, 7 min | <LOQ | 0.387 ± 0.065 |
PL6 | Aspen | H2SO4, 165 °C, 10 min | 0.638 ± 0.307 | 0.511 ± 0.101 |