Fig. 4From: Totally chlorine-free bleaching of prehydrolysis soda pulp from plantation hardwoods consisting of various lignin structuresEffect of acid post-hydrolysis on furfural production (prehydrolysis conditions: 2.5 h and 155–170 °C; dehydration conditions: 6% sulfuric acid concentration, at 98 °C for 1 h; acid post-hydrolysis conditions: 4% sulfuric acid concentration, at 100 °C and for 3 h)Back to article page