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Öğe Biodiesel properties of microalgae (Chlorella protothecoides) oil for use in diesel engines(Taylor & Francis, 2018-09-08) Yaşar, Fevzi; Altun, ŞehmusIn this study, biodiesel was produced from a microalgae oil, chlorella protothecoides, by typical alkali-catalyzed transesterification in conditions such as a 0.75 wt.% KOH of the oil as catalyst, 68°C and 80 min which was agreed as optimal conditions after investigating the effect of KOH concentration, reaction temperature and time at constant molar ratio of 6:1 on the conversion rate and fuel properties. Under these conditions, a 98.6% conversion rate of algae oil to its methyl ester was achieved with ester content higher than 96%. Furthermore, all physicochemical properties met the requirements of international biodiesel standards, EN 14214 and ASTM D 6751, with some remarkable ones such as high cetane number (57.3) and low CFPP (−10°C). The effect of microalgae biodiesel volume fraction in the fuel on the kinematic viscosity, CFPP, lubricity, density, and distillation temperature was also studied. A blending ratio of the algal-biodiesel up to 50% (v/v) was also found in agreement with the standards for biodiesel-diesel blends. From GC analysis, oleic and linoleic acids were found to be major fatty acids, and then the oxygen extended sooting index and adiabatic flame temperature were calculated using fatty acid distribution for evaluating the main diesel emissions such as soot and NO. As a result, the algae oil studied here was found to be an appropriate raw material for producing biodiesel and for using in Diesel Engines and its properties are within the typical ranges of conventional biodiesel fuels.Öğe New schiff base ligand derived from 4-aminoantipyrine: Synthesis and spectroscopic characterization(Azərbaycan Dövlət Neft və Sənaye Universiteti, 2017) Dağ, Beşir; Yaşar, Fevzi; Çakmak, ReşitÖğe Fuel properties of biodiesels produced from blends of canola oil and animal tallow(SILA SCIENCE, 2011-04) Adin, Hamit; Altun, Şehmus; Yaşar, FevziBiodiesel is an alternative diesel fuel that can be produced from renewable feedstocks such as vegetable oil or animal fats by transesterification with methanol for using in diesel engines. The viscosity and density of biodiesel fuels are important parameters due to being key fuel properties for injection and combustion process of diesel engines. These fuel properties mainly depend on the feedstock which is used in the biodiesel production. Also, lubricity is an important for diesel engine fuels due to the fuel injection systems are lubricated by the fuel itself. In this study, the blends containing 0, 25, 50, 75 and 100% of food-grade canola oil/inedible animal tallow in volume basis were prepared and converted into methyl esters by base-catalyzed transesterification. Effect of canola oil ration in the feedstock on the viscosity, density and lubricity were investigated. Lubricity was determined using the high-frequency reciprocating rig (HFRR) test. Experimental results showed that the kinematics viscosity of increased as animal tallow ratio increased in the feedstock, as animal tallow itself is more viscous than canola oil. Also, density did not change much when blended feedstocks were used. Besides, it was observed that lubricity of biodiesel fuels from blended feedstocks was slightly get worse compared with pure biodiesels.Öğe The amide derivatives of L-tyrosine: Synthesis and spectroscopic characterization(Azərbaycan Dövlət Neft və Sənaye Universiteti, 2017) Dağ, Beşir; Yaşar, Fevzi; Çakmak, ReşitÖğe Synthesis, characterization of novel some schiff base ligands derived from 4-aminoantipyrine(Azərbaycan Dövlət Neft və Sənaye Universiteti, 2017) Dağ, Beşir; Yaşar, Fevzi; Çakmak, ReşitÖğe Biodiesel production from leather industry wastes as an alternative feedstock and its use in diesel engines(SAGE, 2013-11-01) Altun, Şehmus; Yaşar, FevziWaste leather fat is produced by the leather industry in fleshing processing and discarded as waste. These wastes can be used as a potential feedstock for biodiesel production due to their considerable fat content. In this work, raw fleshing oil which is a fat-originated waste of the leather industry was transesterified using methanol in the presence of an alkali catalyst to obtain biodiesel. The obtained biodiesel was then used in a four-stroke and direct injection diesel engine to evaluate the biodiesel behavior as an alternative diesel fuel, at a constant speed under variable load conditions. Blends [20 and 50% (v/v)] of biodiesel with diesel reference fuel were tested too. The emissions test results compared with diesel reference fuel showed that diesel engine fueled by biodiesel emitted significantly lower opacity and gaseous emissions than the same engine fueled by diesel reference fuel, and with very similar performance. The obtained data indicated that biodiesel from leather industry wastes is promising as an alternative fuel for diesel engines, and can be used to substitute diesel fuel in terms of performance and emission parameters without any engine modification.Öğe Design, synthesis, and spectral characterization of schiff bases derived from 4-aminoantipyrine(Azərbaycan Dövlət Neft və Sənaye Universiteti, 2017) Dağ, Beşir; Yaşar, Fevzi; Çakmak, ReşitÖğe Synthesis characterization and using some of schiff base ligands derived from 4 aminoantipyrine as an inhibitor(Selçuk Üniversitesi, 2017) Dağ, Beşir; Yaşar, Fevzi; Kızılkaya, HakanSchiff bases and their complexes are widely studied because of the increasing recognition of their role in biological systems. In azo methine derivatives, the C=N linkage is essential for biological activity; several azomethines were reported to possess remarkable antibacterial and antifungal, anticancer. With the increasing incidence of deep mycosis, there has been increasing emphasis on the screening of new and more effective antimicrobial drugs with low toxicity. These compounds were recently found to have significant antitumor and biological activity. Antipyrine derivatives are reported to exhibit analgesic and antiinflammatory effects, antiviral, antibacterial, and herbicidal activities, and have also been used as hair color additives and to potentiate the local anesthetic effect of Lidocaine. Transition metal complexes with ligands derived from 4-aminoantipyrine have significant biological activity. This prompted us to synthesize a new series of heterocyclic Schiff bases containing the antipyrinyl moiety. The present study reports synthesis and charaterization of Schiff bases derived from 1-phenyl-2,3-dimethyl-4-(N-2 hydroxybenzylidene)-3- pyrazolin-5-one and 1-phenyl-2,3-dimethyl-4-(N-2-hydroxynaphthylidene)-3-pyrazolin-5- one with 5-aminoisophtlalic acid [1-2]. These compounds were synthesized in high yield and characterized by SEM, FT–IR, 1H NMR and 13C NMR.Öğe New nitroaromatic esters derived from salicylaldehyde: Synthesis and characterization(Azərbaycan Dövlət Neft və Sənaye Universiteti, 2017) Dağ, Beşir; Yaşar, Fevzi; Çakmak, ReşitÖğe Preparation, characterization of novel some schiff base ligands derived from 4-aminoantipyrine as a potential corrosion inhibitor(Azərbaycan Dövlət Neft və Sənaye Universiteti, 2017) Dağ, Beşir; Yaşar, Fevzi; Çakmak, Reşit
