Table 2 Experimental design, extraction yield, amount of hemicellulose extracted and calorimetric value of the solid residues from acid hydrolysis of the three raw materials
From: Tagasaste, leucaena and paulownia: three industrial crops for energy and hemicelluloses production
XC | XT | Tagasaste | Leucaena | Paulownia trihybrid | |||
|---|---|---|---|---|---|---|---|
Extraction yield/Hemicelluloses extracted (%) | GCV at constant volume (J/g o.d.b.) | Extraction yield/Hemicelluloses extracted (%) | GCV at constant volume (J/g o.d.b.) | Extraction yield/Hemicelluloses extracted (%) | GCV at constant volume (J/g o.d.b.) | ||
1 | 1 | 52.8/87.1 | 20,889 | 68.9/79.4 | 19,869 | 45.9/95.3 | 21,222 |
1 | − 1 | 48.9/79.1 | 19,619 | 84.3/42.9 | 19,353 | 45.3/87.1 | 20,400 |
− 1 | 1 | 64.0/82.2 | 20,714 | 58.8/75.4 | 19,292 | 44.8/77.2 | 20,673 |
− 1 | − 1 | 83.3/40.2 | 19,506 | 71.7/52.9 | 18,916 | 65.1/38.2 | 19,642 |
1 | 0 | 53.7/71.5 | 19,905 | 77.2/54.7 | 19,149 | 47.5/92.3 | 20,713 |
− 1 | 0 | 76.5/50.2 | 19,724 | 65.6/56.1 | 19,038 | 56.0/41.4 | 20,112 |
0 | 1 | 61.1/86.5 | 20,492 | 59.4/77.7 | 19,873 | 51.9/60.2 | 20,784 |
0 | − 1 | 68.1/63.6 | 19,443 | 73.7/47.8 | 19,265 | 59.1/60.1 | 19,753 |
0 | 0 | 70.2/62.0 | 19,605 | 66.2/55.2 | 19,361 | 53.2/57.2 | 20,165 |
0 | 0 | 69.9/62.0 | 19,604 | 66.3/54.8 | 19,305 | 54.1/57.5 | 20,200 |