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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
  1. GCV Gross Calorific Value