Table 3.
The weight percent of glucose, xylose and lignin in native and IL-treated (at 50°C and 120°C) poplar, switchgrass and corn stover are given below. Lignin is the sum of acid soluble and acid insoluble lignin. All the measurements are an average of triplicate samples except for switchgrass and corn stover measurements at 50°C. These are an average of duplicate samples with less than 6% deviation. The crystallinity indices were calculated on the dry substrates.
| Substrate | % Glucose | % Xylose | % Lignin | CrI |
|---|---|---|---|---|
| Poplar | 37±1.4 | 11±0.6 | 24±0.4 | 38 |
| Poplar 50°C | 30±3 | 11±1 | 23±6 | 19 |
| Poplar 120°C | 29±8 | 10±2 | 25±3 | 22 |
| Corn stover | 28±4 | 14±2 | 20±5 | 23 |
| Corn stover 50°C | 32 | 16 | 20 | 19 |
| Corn stover 120°C | 25±1 | 11±1 | 19±3 | 29 |
| Switchgrass | 28±3 | 15±3 | 21±6 | 21 |
| Switchgrass 50°C | 19 | 10 | 17 | 22 |
| Switchgrass 120°C | 20±2 | 12±1 | 22±1 | 26 |