Ingenieur Vol 91 2022 | Page 57
weight of fatty acid methyl ester The yield of FAME = x 100 % weight of oil used
Equation 1
Figure 1 : SEM test of catalyst
Figure 2 : FTIR spectra of catalyst
Figure 3 : Three-dimensional response surface plot for the KOH / sea sand
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Ingenieur Vol 91 2022 | Page 56
Ingenieur Vol 91 2022 | Page 58