3. Transesterification reaction
The transesterification reaction was carried out in a 500 ml three neck flask, with a
thermometer, stirrer and condenser. For each run the mixture of methanol and catalyst
was preheated to the desired temperature and after that the oil that separately heated to
suitable temperature add to it with 300 rpm mixing intensity. After the reaction
completion, the mixture was heated to 90 ˚C for 3 h to evaporate excess methanol, and
then the mixture changes to two phases. The upper layer was methyl ester or biodiesel
and the lower phase was glycerin. In addition, the catalyst can be separated easily with
a simple filtration process and can be reused many times. Because there is no catalyst in
the final product, the final product does not need washing [Fenghua et al., 2008]. Thus,
this reaction does not produce any waste water and hence environment-friendly.
3. Transesterification reactionThe transesterification reaction was carried out in a 500 ml three neck flask, with a thermometer, stirrer and condenser. For each run the mixture of methanol and catalyst was preheated to the desired temperature and after that the oil that separately heated to suitable temperature add to it with 300 rpm mixing intensity. After the reaction completion, the mixture was heated to 90 ˚C for 3 h to evaporate excess methanol, and then the mixture changes to two phases. The upper layer was methyl ester or biodiesel and the lower phase was glycerin. In addition, the catalyst can be separated easily with a simple filtration process and can be reused many times. Because there is no catalyst in the final product, the final product does not need washing [Fenghua et al., 2008]. Thus, this reaction does not produce any waste water and hence environment-friendly.
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