Table 2.

pH data acquired during the optimized giant reed hydrothermal treatment at different reaction temperatures. Agronomic data: “Pisa” ecotype; harvest time: August; crop age: 4 years. Operating conditions: 0.35 g biomass, 5.00 g water, HCl concentration: 1.68 wt %. Hydrolysis time: 15 min.

Temperature (°C)	Initial pH	Final pH	Δ pH
120	0.67	0.41	0.26
130	0.61	0.40	0.21
140	0.62	0.32	0.30
150	0.66	0.32	0.34
160	0.68	0.29	0.39
170	0.67	0.27	0.40
180	0.68	0.26	0.42
190	0.68	0.26	0.42