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    The Basic Properties of Transesterified Corn Oil and Biodiesel-Diesel Blends
    (Taylor & Francis Inc, 2011) Aydin, F.; Kafadar, A. B.; Erdogan, S.; Saydut, A.; Kaya, C.; Hamamci, C.
    Biodiesel, one of green fuels and clean energies, is compatible with traditional petroleum-based diesel and both can be completely blended without any stratification. Biodiesel was prepared from corn by transesterification of the crude oil with methanol in the presence of NaOH as catalyst. Transesterified corn oil has better properties globally because it has the greater monounsaturated content. Determination of blend levels is one important issue to the quality control of biodiesel due to the increase of biodiesel-diesel blends commercialization. The objective of this study was to characterize how the key fuel properties changed when the commercial petroleum diesel fuel was blended with methyl ester produced from corn oil. In the present study, commercially available diesel fuel was blended with the biodiesel prepared from corn oil. The blends of biodiesel petroleum diesel were prepared on a volume basis. The important properties of corn oil methyl ester (biodiesel)-diesel fuel blends, such as density and kinematic viscosity, are found out and compared to those of No. 2 petroleum diesel, ASTM, and EN biodiesel standards.
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    Öğe
    Biodiesel Production via Transesterification from Safflower (Carthamus tinctorius L.) Seed Oil
    (Taylor & Francis Inc, 2011) Hamamci, C.; Saydut, A.; Tonbul, Y.; Kaya, C.; Kafadar, A. B.
    The safflower (Carthamus tinctorius L.) oil was extracted from the seeds of the safflower that grows in Diyarbakir, SE Anatolia of Turkey. Carthamus tinctorius L. seed oil was investigated as an alternative feedstock for the production of a biodiesel fuel. By traditional solvent extraction, oil was obtained and biodiesel was prepared from safflower by transesterification of the crude oil. A maximum conversion of 93% (oil to ester) was achieved using 100% excess methanol, i.e., molar ratio of methanol to oil is 6:1 and catalyst (NaOH) concentration of 0.5% at 65 degrees C. The viscosity of biodiesel oil is nearer to that of petroleum diesel and the calorific value is about 5.5% less than that of diesel. The quality of biodiesel is most important for engine parts and various standards have been specified to check the quality. The important properties of safflower oil and its methyl ester (biodiesel), such as density, kinematic viscosity, flash point, iodine number, neutralization number, pour point, cloud point, and cetane number, are found out and compared to those of No. 2 petroleum diesel. Fuel properties of methyl esters of Carthamus tinctorius L. oil compare well with ASTM and EN biodiesel standards. The present experimental results support that methyl ester of safflower seed oil can be successfully used as diesel.
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    Öğe
    Effect of homogeneous alkaline catalyst type on biodiesel production from soybean [Glycine max (L.) Merrill] oil
    (Natl Inst Science Communication-Niscair, 2016) Saydut, A.; Kafadar, A. B.; Aydin, F.; Erdogan, S.; Kaya, C.; Hamamci, C.
    Transesterification or alcoholysis is the most commonly applied method for biodiesel production. A catalyst is needed to improve the transesterification reaction and yield. The present study used soybean oil as the raw oil to mix with methanol and four strong alkali catalysts (NaOH, KOH, CH3ONa & CH3OK) to undergo a transesterification reaction. Transesterification was carried out using 100% :excess alcohol, i.e., molar ratio of alcohol to soybean oil was 6:1, and, catalyst concentration of 1% at 60 degrees C. Alkali metal alkoxides were found to be more effective transesterification catalysts compared to hydroxides. Sodium methdxide was the most efficient catalyst, although KOH and NaOH could also be used because they are cheaper and are used widely in large scale processing:
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    Öğe
    Pistacia terebintus L. Seed Oil: A New Possible Source of Biodiesel
    (Taylor & Francis Inc, 2014) Baysal, Z.; Uyar, F.; Saydut, A.; Kaya, C.; Kafadar, A. B.; Hamamci, C.
    Pistacia terebintus, a member of the family Anacardiaceae, is a perennial plant that widely grows in the southern and western regions of Anatolia. Pistacia terebintus L. seeds contain 66% oil, which allows the possibility of economical exploitation. The main monounsaturated fatty acid is oleic (55-75% w/w), polyunsaturated linoleic (15-38% w/w), while the main saturated fatty acid is palmitic (8-20% w/w). Pistacia terebintus L. seed oil was investigated as an alternative feedstock for the production of a biodiesel fuel. Three commonly used catalysts for alkaline-catalyzed transesterification, i.e., sodium hydroxide, potassium hydroxide, and sodium methoxide, were evaluated using conventional heating with Pistacia terebintus L. oil. High biodiesel yield (97.8%) was obtained by using sodium methoxide, because they only contain the hydroxide group, necessary for saponification, as a low proportion impurity. The methyl ester has relatively closer fuel properties to diesel than that of raw seed oil. Plant improvement programs could make Pistacia terebintus L. a viable alternative for biodiesel production.