Table 5 Design of orthogonal experiment (L16 (4 3 )) for ethanol extraction of steam-exploded wheat straw and lignin fractionation yield under different conditions
From: Multilevel composition fractionation process for high-value utilization of wheat straw cellulose
Test number | Ethanol concentration X 1(%) | Temperature X 2(°C) | Time X 3(minutes) | Fractionation yield of lignin (%) |
|---|---|---|---|---|
1 | 45 | 120 | 60 | 75.4 (1.3) |
2 | 45 | 140 | 120 | 78.7 (2.1) |
3 | 45 | 160 | 150 | 83.5 (1.6) |
4 | 45 | 180 | 90 | 75.8 (2.1) |
5 | 60 | 120 | 90 | 77.4 (2.3) |
6 | 60 | 140 | 150 | 76.7 (1.8) |
7 | 60 | 160 | 120 | 88.4 (1.6) |
8 | 60 | 180 | 60 | 80.3 (1.2) |
9 | 75 | 120 | 120 | 82.9 (2.4) |
10 | 75 | 140 | 60 | 74.9 (1.6) |
11 | 75 | 160 | 90 | 81.4 (1.9) |
12 | 75 | 180 | 150 | 77.5 (1.5) |
13 | 90 | 120 | 150 | 78.4 (2.1) |
14 | 90 | 140 | 90 | 82.5 (2.0) |
15 | 90 | 160 | 60 | 83.8 (2.3) |
16 | 90 | 180 | 120 | 85.3 (1.1) |