The present work is aimed at analysing the compositions of the water, ethanol, and gasoline which has Research Octane Number/RON was 88 forming a stable emulsion (one phase) employing a ternary graph. When the mixture process, the blended fuels consisted of water-ethanol-gasoline were successfully prepared in which they were formed in one phase. Ethanol was derived from Arenga pinnata liquor which is locally called cap tikus using a home-made reflux distillation filled by packing materials. Ethanol obtained were differing their concentration that depended on the column temperature set. It was found that the purities were ranged from 80 to 96% and the higher column temperature was chosen the lower concentration was obtained. Each aqueous ethanol was blended with gasoline to obtain a homogenous solution. For ethanol 80%, compositions of water, pure ethanol, and gasoline were observed at 18, 74, and 8 (%v/v), and 22, 70, and 7 (%w/w). While ethanol 96%, the compositions ratios were 1:22:77 (%v/v) and 1:23:76 (%w/w). The ranges of pure ethanol, gasoline, and water in which they formed one phase solution were recorded at 23-70%, 7-76%, and 1-22%. The work found that substance was in one phase if the wet ethanol keeps being added. When the ethanol composition has decreased the substance was separated into wet ethanol and gasoline. The minimum ethanol dissolved completely into gasoline was of 80%.
This study investigates the composition and fuel parameters of a fuel blend of aqueous ethanol and gasoline, with RONs (Research Octane Numbers) of 90 and 92, called pertalite and pertamax in Indonesia, respectively. The emulsion fuel blend of gasoline and ethanol was prepared successfully, and the concentrations ranged from 80 to 98% (v/v). The steps employed in this work are as follows: first, the fermentation of sugar tapped from a palm tree (Arenga pinnata). The obtained liquor containing ethanol was distilled using a reflux still to separate ethanol and water. The purity of the ethanol obtained from the reflux process ranged from 80 to 96%, depending on the column temperature set. Ethanol solutions of 97 and 98% purities were obtained through an absorption method employing lime particles. Subsequently, aqueous ethanol was blended with gasoline manually inside a flask. It was discovered that the minimum ethanol concentration, which could be blended with pertalite to form a single-phase substance, was 80%. By using 80% ethanol in the blending process, the composition ratio of pertalite, pure ethanol, and water was recorded as 1:11.65:2.91 (in volume unit), while this was not the case with pertamax. The minimum ethanol concentration that could be blended with pertamax to form a single-phase emulsion was 88%, with a composition ratio of 1:5.91:0.81. The composition proportions of the three components with 96% ethanol were 1:0.27:0.01 (RON 90) and 1:0.41:0.02 (RON 92). It was observed that the higher the ethanol concentration, the less the amount of ethanol required for the blending process with gasoline to form a single-phase emulsion.
This work aims at preparing the blended fuels in a stable emulsion in which the biodiesel was obtained from palm oil with applying the near isochoric subcritical trans-esterification. The work procedures are the following: the preparation chemicals needed; the synthesis of the biodiesel; POME (palm oil methyl ester) analysis; the blending process of the aqueous ethanol-biodiesel (Aq.Et-BD) and ethanol-diesel-biodiesel (Aq.Et-BD-D) whereby they formed in a stable emulsion. It was obtained that the compositions of water, ethanol, and biodiesel using ethanol 94-97% were ranged from 0.69-1.60, 10.74-38.40, and 69.57-88.57%. By employing ethanol with concentration 94-95%, the emulsion appeared many droplets distributed throughout the substance. It was observed by increasing biodiesel composition after a stable emulsion attained the phase did not change. After emulsions blended, the work was proceeded with the measurement of the fuel parameters such as density, SG, API, RPV, flash and pour points, cetane number, and distillation properties.
Tujuan dari penelitian ini adalah untuk melakukan studi bahan bakar campuran, etanol, diesel, dan biodiesel yang terbuat dari minyak kelapa sawit dan kelapa. Penelitian ini dilakukan untuk mengurangi penggunaan bahan bakar fosil dan pencemeran yang dihasilkannya. Biodiesel dibuat dengan menggunakan metode konvensional dan transesterifikasi subkritis dekat isokorik. Setelah disiapkan, biodiesel, diesel, dan etanol 96% dicampur. Sampel dianalisis menggunakan metode ASTM. Sampel 1b yang terdiri dari 69 % biodiesel memiliki densitas 0.886 , viskositas 5,182 , titik api 66 , titik tuang 6 . Sampel 2b yang mengandung 60 % biodiesel memiliki densitas 0,865 , viskositas 4,271 , titik api 65 , titik tuang 3 . Sampel 3b yang mengandung 72 % biodiesel memiliki densitas 0,878 , viskositas 5,350 , titik api 70 , titik tuang 0 . Sampel 4b yang terdiri atas 54 % biodiesel memiliki densitas 0,859 , viskositas 4,289 , titik api 56 , titik tuang 3 . Berdasarkan peraturan Pemerintah Indonesia tentang spesifikasi bahan bakar diesel, sampel 2b adalah campuran terbaik, sedangkan sampel 3b yang tidak sesuai dengan spesifikasi.The purpose of this study is to conduct a study of blended fuels, ethanol, diesel, and biodiesel prepared from palm and coconut oils. This research was conducted to reduce the usage of fossil fuels and its resulting pollution. Biodiesel was prepared using conventional method and near isochoric subcritical transesterification. After prepared, biodiesel, diesel, and 96% ethanol were mixed. The sample was analyzed using the ASTM method. Sample 1b which contains 69 % biodiesel has density 0.886 , viscosity 5.182 , flash point 66 , pour point 6 . Sample 2b containing 60 % biodiesel has density 0.865 , viscosity 4.271 , flash point 65 , pour point 3 . Sample 3b consisting 72 % biodiesel has density 0.878 , viscosity 5.350 , flash point 70 , pour point 0 . Sample 4b that contains 54 % biodiesel has density 0.859 , viscosity 4.289 , flash point 56 , pour point 3 . Based on the regulation of the Indonesia Government about diesel fuel specification, sample 2b is the best blends, while sample 3b is the least one.
Penelitian ini bertujuan untuk membuat biodiesel dengan bahan baku minyak kelapa dan minyak sawit dengan mencampurkan metanol sebagai pelarut dan KOH (kalium hidroksida) sebagai katalis. Proses transesterifikasi berarti mengambil molekul trigliserida atau asam lemak kompleks, menetralkan asam lemak bebas dengan menambahkan metil alkohol menjadi metil ester. Tahapan pertama yaitu membuat biodiesel dengan volume keseluruhan campuran bahan baku, pelarut dan katalis yaitu 575 ml dan 550 ml dengan tekanan maksimum 15 bar dan suhu maksimum 150oC selama satu jam. Tahapan berikutnya menghitung yield yang diperoleh dari biodiesel yang dihasilkan kemudian dilakukan uji Gas Chromatography Mass Spectrometry dan selanjutnya dilakukan uji parameter bahan bakar. Hasil menunjukkan biodiesel dari minyak kelapa memperoleh yield 98,82% lebih besar daripada minyak sawit yang hanya memperoleh yield 92,38%, dan ditemukan komposisi C terbesar pada biodiesel dari minyak kelapa dengan volume keseluruhan campuran bahan 575 ml yaitu C15H30O2 dengan luas area 27.10% sedangkan komposisi terbesar untuk biodiesel dengan volume keseluruhan campuran bahan 550 ml adalah C15H30O2 dengan luas area 24.04%. Untuk biodiesel dari minyak sawit komposisi C terbesar yang terbentuk pada volume keseluruhan campuran bahan 575 ml yaitu C19H36O2 dengan luas area 40.95% dan untuk volume keseluruhan campuran bahan 550 ml komposisi terbesar C19H36O2 dengan luas area 40.88%.This study aims to make biodiesel with raw materials of coconut oil and palm oil by mixing methanol as a solvent and KOH (kalium hydroxide) as a catalyst. The process of transesterification means taking triglyceride molecules or complex fatty acids, neutralizing free fatty acids by adding methyl alcohol to methyl esters. The first stage is making biodiesel with an overall volume of a mixture of raw materials, solvents and catalysts of 575 ml and 550 ml with a maximum pressure of 15 bar and a maximum temperature of 150oC for one hour. The next stage is calculating the yield obtained from the biodiesel produced then the Gas Chromatography Mass Spectrometry test and then to test the fuel parameters. The results show biodiesel from coconut oil yields 98.82% greater than palm oil which only yields 92.38% yield, and found the largest composition of C in biodiesel from coconut oil with a total volume of 575 ml mixture material, namely C15H30O2 with an area of 27.10% while the largest composition for biodiesel with an overall volume of a mixture of 550 ml material is C15H30O2 with an area of 24.04%. For biodiesel from composition C largest palm oil that is formed in the overall volume of the mixture of 575 ml, namely C19H36O2 with an area of 40.95% and for the overall volume of the mixture of 550 ml the largest composition of C19H36O2 with an area of 40.88%.
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