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    Comparison of the biodiesel quality produced from refined sunflower (Helianthus annuus L) oil and waste cooking oil
    (Multi-Science Publ Co Ltd, 2010) Saydut, Abdurrahman; Kafadar, Aylin Beycar; Tonbul, Yalcin; Kaya, Canan; Aydin, Firat; Hamamci, Candan
    A major hurdle in commercialization of biodiesel from vegetable oil, in comparison to petroleum-based diesel fuel, is its cost of manufacturing, primarily the raw material cost. Waste cooking oil is one of the economical sources for biodiesel production. NaOH and KOH catalyzed processes for prepared of biodiesel expressed of fatty acid methyl ester were comparatively studied for refined sunflower (Helianthus annuus L) oil and waste cooking oil. Transesterification was carried out using 100% excess methanol; i.e. molar ratio of methanol to oil is 6:1 and catalyst concentration of 0.5% at 60 degrees C. Fuel properties and specifications such as viscosity, flash point, cloud point, pour point, density, cetane number, and acidic value are determined and compared to each other and petroleum diesel. This study characterizes the fuel properties of biodiesel produced from refined sunflower oil and waste cooking oil using two different catalysts (NaOH and KOH) to provide a comprehensive understanding of biodiesels.
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    Öğe
    Microwave assisted transesterification of maize (Zea mays L.) oil as a biodiesel fuel
    (Sage Publications Inc, 2010) Ozturk, Gulsen; Kafadar, Aylin Beycar; Duz, M. Zahir; Saydut, Abdurrahman; Hamamci, Candan
    Maize (Zea mays L.) oil is a highly valuable agricultural commodity for the Turkey. Transesterified maize oil has the global better properties because it has the greater monounsaturated content. Biodiesel has been prepared from maize by transesterification of the crude oil under microwave irradiation, with methanol to oil molar ratio of 10:1, in the presence of 1.5% NaOH as catalyst and 5 minutes time, the conversion of maize oil to methyl ester was over 98%. Compared with conventional heating methods, the process using microwaves irradiation proved to be a faster method for alcoholysis of triglycerides with methanol, leading to high yields of biodiesel.
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    Öğe
    Process optimization for production of biodiesel from hazelnut oil, sunflower oil and their hybrid feedstock
    (Elsevier Sci Ltd, 2016) Saydut, Abdurrahman; Erdogan, Sait; Kafadar, Aylin Beycar; Kaya, Canan; Aydin, Firat; Hamamci, Candan
    The most important constituent needed for biodiesel development is the feedstock. As the availability of feedstock is limited, the possibility of using the hybrid feedstock has been explored. Biodiesel has been synthesized from hazelnut (Corylus avellana L.) kernel oil, sunflower (Helianthus annuus L.) oil and hybrid (hazelnut and sunflower) (50: 50 v/v) feedstocks. Ester yield of vegetable oil to fatty acid methyl esters (FAME) was found to be 97.5%, 97.3% and 97.9% for hazelnut, sunflower and hybrid feedstocks respectively. The reaction parameters were used to be 6: 1 (methanol to oil) molar ratio, KOH (0.7%), at 60 +/- 0.5 degrees C for 2 h during alkali esterification for the three feedstocks. High yield from hybrid feedstock during transesterification reaction clearly indicated that the reaction was not selective for any particular oil. The obtained results important in that in case of scarcity of feedstock both oils could be mixed as well to maintain the constant supply of the feedstock in the perspective of industrial production of biodiesel. (C) 2016 Elsevier Ltd. All rights reserved.
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    Öğe
    Transesterified sesame (Sesamum indicum L.) seed oil as a biodiesel fuel
    (Elsevier Sci Ltd, 2008) Saydut, Abdurrahman; Duz, M. Zahir; Kaya, Canan; Kafadar, Aylin Beycar; Hamamci, Candan
    The sesame (Sesamum indicum L.) oil was extracted from the seeds of the sesame that grows in Diyarbakir, SE Anatolia of Turkey. Sesame seed oil was obtained in 58 wt/wt'Y(,, by traditional solvent extraction. The methylester of sesame (Sesamuni indiculn L.) seed oil was prepared by transesterification of the crude oil. Transesterification shows improvement in fuel properties of sesame seed oil. This study supports the production of biodiesel from sesarne seed oil as a viable alternative to the diesel fuel. (c) 2007 Elsevier Ltd. All rights reserved.