Results and discussion
PSME is produced from transesterification of palm
stearin with methanol and using NaOCH
3
as catalyst.
Properties of PSME were presented in Table 1.
The results in Table 1 show properties of PSME
which meet Thai Biodiesel Standard [7]. PSME sample
has little amount of Diglycerid
e and Triglyceride, which
cannot be detected with the
resolution of the equipment.
However, white sediment was found in PSME, which
was stored for a long period. The white sediment can
melt upon heating to a temperature of 40-50
o
C but
re-appear upon cooling under ambient condition as a
solid phase at th
e bottom again.