A Study on the Investigation of Diffusion Coefficient for Oil Extraction from Terebinth (Pistacia terebinthus L.) Seeds

摘要

Objective: In this study, the extraction of oil from Pistacia terebinthus L’s seedsgrown in Elazig-TURKEY and called menengic in domestic region was investigated.Crude oil content of the seeds obtained from this region was determined as approximately47% (w/w).Method: Effects of the parameters such as extraction time, temperature, seeds/solvent ratio(dosage), the particle size of seeds and type of solvent were examined on the oil extractionyield. In this context, it has concluded that up to a certain point, the extraction time has increasedthe yield of oil extracted. But the extraction temperature showed activity as dependingon the solvent type.Results: As expected, it has been observed that the yield of oil has decreased depending onthe increase in particle size and dosage as well. The mathematical model obtained by solvingFick's second law under the appropriate boundary and initial conditions were used tocalculate diffusion coefficients for the extraction process. Diffusion coefficients for theseeds with a particle size of 0.55 mm were found to be between 1.15x10-11 and 1.86x10-11m2s-1. To compare the extraction yield of Pistacia terebinthus L’s seeds with that of sunflowerat the same conditions, the diffusion coefficients of sunflower seeds were calculatedin the range of 9.11x10-12 and 1.13x10-11 m2s-1.Conclusion: These figures show that the diffusion coefficients calculated for both oilyseeds are nearly equivalent to each other. The fatty acid composition of extracted oil fromPistacia terebinthus L’s seeds was determined by GC-FID. The GC-FID results showedthat oleic, linoleic (ω-6) and palmitic acid were main fatty acids in the oil obtained frommenengic seeds.