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ALİBAŞ, KAMİL

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ALİBAŞ

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    Publication
    An investigation of engine and fuel injection system performance in an agricultural tractor operating with b20 biofuel
    (Taylor & Francis Inc, 2022-09-14) Düzgüner, Ender; Ulusoy, Yahya; ULUSOY, YAHYA; Alibaş, İlknur; ALİBAŞ, İLKNUR; Bolat, Alper; Alibaş, Kamil; ALİBAŞ, KAMİL; 0000-0003-0170-8038; 0000-0002-1898-8390; 0000-0003-2658-3905
    In this study, two different 55-kW powered agricultural tractors of the same make and model were operated for 1000 h under similar field conditions, one using diesel fuel (DF) and the other a fuel blend of 20% biodiesel-80% diesel (B20). By the end of 1000 h of operation, the performance values of the B20 fuel were determined to be 3% lower than for the DF. Although the values of CO (40%), HC (40%), and PM (46%) were lower than those of DF, the NOx (7%) was determined to be higher, as expected. Each injector needle and nozzle tip was examined in terms of a functional evaluation via visual inspection, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX). According to the analyses, the B20 fuel blend C content was determined to be 73.47% and its O content 23.34%, with the quantity of the other elements lower than 1%. Similarly, for DF, the C content was determined to be 50.49% and that of O 19.95%, with the other elements in trace amounts. Furthermore, Fourier-transform infrared spectroscopy (FTIR) spectral analysis was used to examine the deposits on the injector nozzle tips and needles. Polyisobutylene succinimide (PIBSI) and inorganic components were observed on the injector needles, whereas aging products and inorganic components were seen on the injector nozzle tips. No significant difference was found between the results of the DF and B20 fuels in terms of injector nozzle function.
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    Publication
    The effect of different drying methods and microalgae species on the quality parameters of biodiesel obtained by transesterification technique
    (Pergamon-elsevier Science Ltd, 2022-12-15) Koç, Caner; Alibaş, İlknur; ALİBAŞ, İLKNUR; Yılmaz, Aslıhan; YILMAZ, ASLIHAN; Alibaş, Kamil; ALİBAŞ, KAMİL; Arslan, Murat; ARSLAN, MURAT; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Gemlik Meslek Yüksekokulu.; 0000-0002-1898-8390; 0000-0002-4913-905X; 0000-0002-0099-1110; AAY-2088-2021
    In the study, seven microalgae species called Nitzschia sp., Nannochloropsis sp., Botryococcus braunii, Neochloris oleoabundans, Schizochytrium sp., Chlorella vulgaris L., and Chlorella variabiilis L. were dried by four drying methods: spray, convective, vacuum, and microwave. Biodiesel was produced from dried microalgae via transesterification.The vegetable oil yield was the maximum in spray and vacuum dried Schizochytrium with 35.50 and %34.53, respectively. Similarly, the highest biodiesel yield with 100% was obtained in Schizochytrium dried by spray technique. However, the cloud point of -1.77 degrees C was the lowest in Botryococcus braunii samples dehydrated by microwave drying. The highest pour point with -10.13 degrees C was obtained in microwave dried Chlorella variabilis samples, but the maximum freezing point was found in the microwave and convective dried samples of Chlorella variabilis with -13.60 and -13.70 degrees C, respectively. The lowest water content was measured in biodiesel samples from Botryococcus braunii, Chlorella vulgaris, and Chlorella variabilis dried by microwave technique. However, the best results regarding calorific value were found in Schizochytrium samples dried by spray and vacuum. The viscosity with 6.08 mm2 s-1 and density with 0.90 g cm-3 of Botryococcus braunii dried by the microwave method were at the maximum.Interestingly, two species commonly used in biodiesel production, Chlorella vulgaris and Chlorella variabilis, could not meet the expectations regarding quality parameters. Also, Schizochytrium and Nitzschia were determined as the most suitable microalgae species for the quality standards for biodiesel production. Compared to the others, the most successful results were obtained in the biodiesel produced from Schizochytrium dried spray drying.