As shown above, the water fractionation method can achieve low acidity and high heating values of
lignin-rich fraction. This research team then studied the effects of the various parameters in the process, in
order to optimize the process. Parameters such as bio-oil/water ratio, stirring speed, number of washing
steps, water temperature, and stirring time were studied, as shown in Table 35. The experiments’ details are
discussed below.
As shown above, the water fractionation method can achieve low acidity and high heating values oflignin-rich fraction. This research team then studied the effects of the various parameters in the process, inorder to optimize the process. Parameters such as bio-oil/water ratio, stirring speed, number of washingsteps, water temperature, and stirring time were studied, as shown in Table 35. The experiments’ details arediscussed below.
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