Judul: Kajian teknologi produksi poligliserol dari hasil samping industri biodiesel
Abstrak: The transesterification process in biodiesel production, produces main product (90% methyl ester) and by product (10% glycerol). The glycerol from the biodiesel process consists of 40-90% glycerol, 8-50% water content, and methanol less than 5-10%. The pure glycerol had been produced by the glycerol purification process when the crude glycerol had been separated from impurities (Idaho, 2006). Glycerol purification process by using H3P04 was carried out to neutralize and separate the fatty acid. The colour and minerals are absorbed by the active carbon. The polymerization of glycerol is one of the alternative process in order to reuse the by product of biodiesel industry. Polyglycerol could be used as emulsifier, emollient, disperant, spreading agent, and solubilizer. The polyglycerol and derivative could be used in many industry such us polymer additive, lubricant, drilling fluid, hydraulic fluid, cutting oil, etc. The objectives of this research is to find out the right process of polyglycerol production froin by-prod~~ocft biodiesel industry (glycerol). The treatments of the process were temperature (200,225, and 245 OC), heating time (6, 8, and 10 hours), and type of catalyst (KOH and NaOH) which has concentration 0,5 and 1 %. The result of this research showed that the higher temperature and the longer heating time can increase the viscosity and density of the product as well as the darken of the colour. Hydroxyl value was used to determine degree of polymerization. The degree of polymerization has value r 5. According to analysis of density, viscosity, boiling point, hydroxyl value and functional group, the best process of polymerization is reached at temperature 200 and 225oC.
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Judul: Pemucatan Gliserol Kasar Hasil Samping Pembuatan Biodiesel Menggunakan Adsorben
Abstrak: Glycerol compound is a byproduct the making of biodiesel that high economic value. Glycerol with various levels of quality are needed as raw materials in industry. Glycerol used in the food industry, cosmetics industry, pharmaceutical industry, tobacco processing industry, industrial lubricating, and also oleochemical industry. In the future when the demand of biodiesel is increasing along with population growth, it also increases the production of glycerol. The use of glycerol especially pure glycerol in a various of products have been developed. But before the process of making a compound glycerol derivatives of glycerol refining process takes most of which crude glycerol was mixed with other materials. The purpose of this research is to determine the effect of adsorbent concentration on the purification of glycerol in order to determine the type and combination of effective adsorbent to produce pure glycerol. The treatment tested in this study is the type of adsorbent (activated carbon and bentonite) and a combination of both adsorbent added. The ratio of activated carbon and bentonite added is 4: 4 (adsorbent total is 8 %), 4: 6 (adsorbent total is 10%), 4: 8 (adsorbent total is 12%) and 4: 10 (adsorbent total is 14%) of the weight of crude glycerol. The results showed that the concentration of adsorbent used in the bleaching have significant effect on water content, ash content and color of glycerol produced but did not have real impact on the number of acid. The use of adsorbent with a total of 14 % to produce glycerol with water content and ash content lower than most others. Based on absorbance values, the adsorbent total 14 % are also more effective in absorbing the colors then the color of the resulting glycerol is clearer. The influence of the total of adsorbent to the water content is higher the amount of adsorbent is added, then the value of water content lower glycerol. Neither the value of ash content nor the lower absorbance with increasing number of adsorbent used. The ratio of the use of adsorbent (activated carbon: bentonite) is the best ratio of 4:10 with the lowest water content value (0.663%), the lowest ash content (0.0543%), transmitance (low absorbance value of 1.987) and 8.74 glycerol levels %. Glycerol analysis using GC-MS (Gass Chromatography Mass Spectrometry) showed that glycerol before and after the purification process still contains the methyl esters of glycerol so that low purity. This is because the reaction is not perfect at the time of the process of making biodiesel. But after the purification process of glycerol content increased from 0.85% to 8.74%.
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Judul: Quantum Convolutional Neural Network (QCNN) for Classification Brain Tumor MRI Image
Abstrak: Penelitian ini bertujuan untuk mengembangkan model deteksi tumor otak menggunakan citra MRI dengan metode Quantum Convolutional Neural Network. Data yang digunakan adalah citra MRI otak yang terdiri dari citra tumor otak glioma, meningioma, hipofisis, dan negatif tumor yang dibagi kedalam data latih dan uji dengan rasio 80:20. Selanjutnya data latih dilakukan penyeimbangan dengan teknik oversampling. Dilakukan pengembangan model untuk mendeteksi tumor otak (biner), dan juga model untuk mengklasifikasikan jenis tumor otak (multiclass). Parameter yang digunakan dalam pengembangan model adalah jumlah ukuran filer = 2 dan kedalaman = 4, dengan qubit 4, dan dilatih dengan jumlah epoch sebanyak 10. Data akan diproses dengan metode Quantum Convolutional Neural Network yang terdiri dari lapisan quantum convolution, lapisan flatten, dan lapisan dense. Model multiclass mendapatkan akurasi 52%, setelah data latih diseimbangkan akurasi model meningkat menjadi 62%, sedangkan model biner mendapatkan akurasi 88%, setelah data latih diseimbangkan akurasi model meningkat menjadi 89%.
Keyword: Citra MRI, Klasifikasi Citra, QCNN, Tumor Otak