Table 4. Pulp Properties and Recycled GVL Purity after Three Fractionation Cyclesa.
| Pulp |
Recycled GVL |
|||||||
|---|---|---|---|---|---|---|---|---|
| cycle | yieldb (% odw) | cellulosec (% odp) | hemicellulosec (% odp) | ligninc (% odp) | GVL (wt %) | H2O (wt %) | furanics (wt %) | acidsd (wt %) |
| 1 | 50.37 | 86.44 | 8.00 | 5.57 | 98.62 | 1.21 | 0.10 | 0.06 |
| 2 | 51.03 | 86.19 | 7.99 | 5.82 | 98.51 | 1.26 | 0.16 | 0.07 |
| 3 | 50.67 | 86.84 | 7.73 | 5.43 | 98.72 | 1.08 | 0.20 | 0.00 |
a
Pulping conditions: E. globulus sawdust, 50 wt % GVL, 180°C, 120 min, L:W = 10 L/kg in a monowave reactor.
b
Percent on oven-dried wood.
c
Percent on oven-dried pulp.
d
Organic acids, including formic acid, acetic acid, and levulinic acid.