Pirshahid, Shewa Ahmadi. Extraction of palm oil from byproducts of small crude palm oil mill by aqueous surfactan combined with sodium chloride for use as biodiesel. Master's Degree(Chemistry). Kasetsart University. Office of the University Library. : Kasetsart University, 2019.
Extraction of palm oil from byproducts of small crude palm oil mill by aqueous surfactan combined with sodium chloride for use as biodiesel
Abstract:
The objective of this research is to investigate the optimum condition in crude palm oil extraction by sodium dodecyl sulfate (SDS) combined with sodium chloride (NaCl) from byproducts of small crude palm oil mill. The response surface methodology (RSM) with a 5-level-4-factor central composite design (CCD) was applied to reduce the amount of each variable effects of preliminary crude palm oil extraction by SDS combined with NaCl. The obtained results from RSM showed that the optimum condition was 0.02M of surfactant concentration, 1:7.1 g/ml of weight to volume of decanter cake to surfactant solution, 1.43% of the weight of NaCl and 61°C of extraction temperature. This condition gave the percentage of crude palm oil yield at 75.04% wt. The optimum condition in biodiesel production from crude palm oil obtained from SDS and NaCl extraction using two step catalyzed process is further studied. The crude palm oil with high free fatty acid content at 7.92% was esterified with methanol using sulfuric acid (H2SO4) as catalyst. The obtained result from RSM technique showed that the optimum condition was 5.96:1 of molar ratio of methanol to crude palm oil, 0.52% of the weight of H2SO4 catalyst and 60 min of reaction time. This optimum condition gave free fatty acid content at 1.85% . The esterified crude palm oil was further transesterified with methanol using potassium hydroxide (KOH) catalyst to produce fatty acid methyl ester (FAME) or biodiesel. The obtained result from RSM technique showed that the optimum condition was 6.23:1 of molar ratio of methanol to esterified crude palm oil, 0.75% wt. of KOH catalyst and 60 min of reaction time. This optimum condition gave 98.76% of %FAME conversion. The fuel properties of biodiesel production were in agreement range according with ASTM and EN standards.
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