Research Article

Evaluation of Separate and Simultaneous Kinetic Parameters for Levulinic Acid and Furfural Production from Pretreated Palm Oil Empty Fruit Bunches

Figure 3

SEM images of OPEFB: (a) before the ammonia pretreatment; (b) after the ammonia pretreatment. Images of (a) and (b) have 2 different magnifications: with 400 µm (upper images) and 10 µm (lower images).
(a)
(b)