Figure 4 shows the effect of concentration of the catalyst on palm oil methanolysis at 50 C and a molar ratio of 6:1. No larger differences were observed on concentration of methyl esters and monoglycerides between 0.6 and 1 wt% of NaOH as catalyst, even though differences were important between 0.2 and 0.6 wt%. For example, after 4 min of reaction, the concentration of methyl esters was 34 wt% at 0.2 wt%, compared to 68 and 72 wt%, at 0.6 and 1 wt%, respectively. After 80 min, the concentration of methyl esters was the same for the 0.6 and 1 wt% reactions, 79 wt%, and only 72 wt% at 0.2 wt% of NaOH. When the temperature was higher, 55 and 60 C, the behavior was similar but the differences observed were smaller.
Figure 4 shows the effect of concentration of the catalyst on palm oil methanolysis at 50 C and a molar ratio of 6:1. No larger differences were observed on concentration of methyl esters and monoglycerides between 0.6 and 1 wt% of NaOH as catalyst, even though differences were important between 0.2 and 0.6 wt%. For example, after 4 min of reaction, the concentration of methyl esters was 34 wt% at 0.2 wt%, compared to 68 and 72 wt%, at 0.6 and 1 wt%, respectively. After 80 min, the concentration of methyl esters was the same for the 0.6 and 1 wt% reactions, 79 wt%, and only 72 wt% at 0.2 wt% of NaOH. When the temperature was higher, 55 and 60 C, the behavior was similar but the differences observed were smaller.
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