Faculty of Engineering

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Browsing Faculty of Engineering by Author "Aman"

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    ADSORPSI ZAT WARNA METHYLENE BLUE MENGGUNAKAN ABU TERBANG BATU BARA (FLY ASH) DENGAN VARIASI UKURAN ADSORBEN DAN KECEPATAN PENGADUKAN
    (2015-12-12) Putra, F. P.; Aman; Drastinawati
    Use of Methylene Blue as a main ingredient in the dye becomes a problem for environmental pollution. It also occurs in the use of coal as fuel is increasing linearly who will be directly proportional to the fly ash waste generated. This study aims to determine the optimum conditions of adsorbent size and the speed of stirring. Adsorption of Methylene Blue performed by mixing with coal fly ash on the condition of adsorbent size (> 100 and 100- 200) mesh and stirring speed (160, 180, 200, 220 and 240) rpm. Adsorption results were analyzed by using a spectrophotometer, the optimum conditions obtained capacities variation of fly ash on the adsorbent is 100-200 mesh size and the optimum conditions capacities fly ash at variable speed is 180 rpm. Adsorption shows a decrease in the power jerap fly ash Methylene Blue dye from the initial 10 mg / g adsorbent to 0.666 mg / g of adsorbent.
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    KONVERSI CANGKANG SAWIT MENJADI BIO-OIL DENGAN METODE PYROLYSIS MENGGUNAKAN KATALIS CoMo/MINERAL ALAM (LEMPUNG CENGAR)
    (2013-01-17) Wati, Fitri; Bahri Syaiful; Aman
    Fuel is a very important energy resource in life, but at the present, crisis of fuel occurred due to the lack of fossil fuel in Indonesia. One way to overcome this case is to develop alternative energy resources, like bio-oil. Bio-oil is produced by pyrolysis of biomass without the presence of oxygen. Biomass used in this research is shell of palm. The purpose of this research is to produce bio-oil as an alternative energy by pyrolysis shell of palm and to explain the effect of CoMo catalyst on yield of bio-oil. Catalyst concentration was varied from 0%, 0.5%, 1% to 1.5% w / w to biomass. Bio-oil formed was analyzed by GCMS and physics tests. 50 grams of biomass shell oil with a size of -60 +40 mesh, silinap 500 ml, and the catalyst CoMo / Clay 1.5 grams introduced into the slurry reactor, and pyrolysis process performed on the operating conditions of temperature 320 oC and stirring speed of 300 rpm with a flow of nitrogen gas (N2) as an inert gas. The results showed that the optimum yield obtained is 50,4 % at the concentration of catalyst CoMo 1.5%. The properties of bio oil produced has density 1.016 kg/m3, viscosity 22.83 cSt, acid value 68.34, flash point 85 oC. From analysis of chemical constituents by GC-MS, bio-oil produced constitutes 5.91% methanol, 2-propanone 2.73%, Acetic acid 54.91%, 17.63% Phenol, Furfural 6.64 %. The results obtained have characteristics approaching the characteristics of standard fuel oil and bio-oil.
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    Pengaruh Konsentrasi Pelarut Dan Rasio Padat-Cair Pada Ekstraksi Silika Dari Fly Ash (Abu Terbang) Batu Bara
    (2015-12-12) Thamrin, Ali; Aman; Sunarno
    Using coal in industrial and power plant always increase every year. Increasing using of coal linearly with number of productrion waste of fly ash from coal. One of alternative method for using fly ash as raw material of silicate. On this research using some variable : solvent consentration (2, 2,5 and 3M) and ratio of solute – liquid (1:6, 1:8 and 1:10). From the analysis of sample with using gravimetry method acquired optimal condition on solvent consentration 3 M and ratio solute-liquid 1:10 with silicate convertion 41,3%.