Browsing by Author "Yenie Elvie"

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    EKSTRAKSI ZAT WARNA DARI KULIT MANGGIS
    (2012-10-29) Bernad, Cameron; Yenie Elvie; Heltina Desi
    Dyes have long been used in food and beverages to improve the appearance of food products. At first, the dyes used are natural dyes from plants and animals. One of the plants that can be used as a dyes source is mangosteen, where the dyes comes from the skin of the mangosteen fruit. There are several methods of extraction for mangosteen skin extract. One of them soxlhetation. Soxlhetation is an immersion method of sample extraction with repeated continuously over time, where the solvent was evaporated and condensed to immers the sample. The purpose of this study was to determine and study the optimum solvent and the optimum time for mangosteen skin extract of soxlhetation method and calculate the yield of mangosteen peel extract. Solvents used 96% ethanol, 96% methanol and ethyl acetate with a variety of 3, 4, and 5 hours for each solvent. Of the three solvents, the highest yield obtained in the solvent methanol and the optimum time was 4 hours. The highest yield was 14.67%.
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    Perengkahan Katalitik Palm Fatty Acid Distillate Menjadi Biofuel Dengan Katalis Fe/Zeolit
    (2013-04-25) Firmandani, M. Arief; Zahrina Ida; Yenie Elvie
    Nowdays, fuels needs in Indonesia are increased instead the productions of fuels are decreased. 94 Palm Oil Indusitries in Indonesia produce Palm Fatty Acid Distillate (PFAD) 750 thousands tons a year. PFAD can be conversed into biofuel by catalytic cracking process. In this research Fe/Zeolite catalyst is used by the compositions 0% to 1,5% by rates of agitations 300 to 600 rpm, the temperature is 380oC and the flowrate N2 is 150 ml/minute. Biofuels was obtained by the higest yield (%) is 88% and the conversion is 58,8% on the concentration of Fe/Zeolite is 0,5% and rate of agitation is 500 rpm. The compositions of Biofuel gained are 9,76% Gasoline, 57,06% Kerosene and Diesel.