Optimization of Two-Step Acid-Catalyzed Hydrolysis of Oil Palm Empty Fruit Bunch for High Sugar Concentration in Hydrolysate

Figure 4

Predicted 3-dimentional changes of xylose concentration at different acid concentrations. (a) 1% (w/v) H₂SO₄ and 0.4% (w/v) H₃PO₄; (b) 2% (w/v) H₂SO₄ and 0.8% (w/v) H₃PO₄; (c) 2.5% (w/v) H₂SO₄ and 1% (w/v) H₃PO₄; (d) 3% (w/v) H₂SO₄ and 1.2% (w/v) H₃PO₄. Other assumed conditions: liquid to solid ratio 3 mL/g, 100–180°C.

(a)

(b)

(c)

(d)