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Primata Mardina
PS T. Kimia FT Unlam
Engineering

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PENGARUH KATALISATOR BASA PADA PRODUKSI BIODIESEL DARI CAMPURAN MINYAK KEDELAI DAN MINYAK JELANTAH Primata Mardina
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1772

Abstract

The traditional alkali-catalyzed transesterification for the synthesis of biodiesel from the mixtures of soybean oil and waste cooking oil was carried out in a laboratory scale reactor. The effect of sodium hydroxide (NaOH) concentration as catalyst was investigated. The reaction temperature and stirring speed were maintained constant for 2 hours at 65oC and 600 rpm. For system equipped by agitation, and considered on rotational speed and length of rotor or in this case, magnetic bar, the G-force for this system was 10.06. The optimum condition was obtained at 0.75 wt% NaOH, mixing ratio of feedstock of 60%WCO-SO. The result showed increasing in the amount of NaOH gave a positive effect on a small percentage of waste cooking oil in mixture of feedstock, and negative effect on a greater percentage of waste cooking oil, it was due to that NaOH as alkali catalyst is very sensitive to qualities of feedstock, especially free fatty acid content of feedstock. Free fatty acid inhibited rate of transesterification reaction, and it caused side reaction; saponification reaction. It leads to complicated purification process and reduction of biodiesel as final product.
PENGARUH KATALISATOR BASA PADA PRODUKSI BIODIESEL DARI CAMPURAN MINYAK KEDELAI DAN MINYAK JELANTAH Primata Mardina
INFO-TEKNIK Vol 11, No 1 (2010): INFOTEKNIK VOL. 11 NO. 1 2010
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v11i1.1769

Abstract

The traditional alkali-catalyzed transesterification for the synthesis of biodiesel from the mixtures of soybean oil and waste cooking oil was carried out in a laboratory scale reactor. The effect of sodium hydroxide (NaOH) concentration as catalyst was investigated. The reaction temperature and stirring speed were maintained constant for 2 hours at 65oC and 600 rpm. For system equipped by agitation, and considered on rotational speed and length of rotor or in this case, magnetic bar, the G-force for this system was 10.06. The optimum condition was obtained at 0.75 wt% NaOH, mixing ratio of feedstock of 60%WCO-SO. The result showed increasing in the amount of NaOH gave a positive effect on a small percentage of waste cooking oil in mixture of feedstock, and negative effect on a greater percentage of waste cooking oil, it was due to that NaOH as alkali catalyst is very sensitive to qualities of feedstock, especially free fatty acid content of feedstock. Free fatty acid inhibited rate of transesterification reaction, and it caused side reaction; saponification reaction. It leads to complicated purification process and reduction of biodiesel as final product.
Menentukan Koefisien Transfer Massa dan Diffusivitas Efektif dari Proses Dekolorisasi Zat Warna Primata Mardina
INFO-TEKNIK Vol 8, No 1 (2007): INFOTEKNIK VOL. 8 NO. 1 2007
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v8i1.1721

Abstract

Dyes are used in various sectors like textile, paper and dyeing industries which discharge waste colored dye liquid. Solid-liquid adsorption principal has been used to decolorize it. The experiment has used granular activated carbon as adsorbent. The experiment’s purpose is determining mass transfer coefficient (Kc) and effective diffusivity (De) as adsorption equipment design parameter.The dye adsorption follows the Langmuir equilibrium equation. The effects of system variables are initial concentration and impeller rotated velocity. The value of Kc of dye at 100 ppm, 80 ppm, 60 ppm, 40 ppm and 20 ppm were found to be 5.209 x 10-4 g/cm2/minute, 5.17 x 10-4 g/cm2/minute, 5.151 x 10-4 g/cm2/minute, 5.163 x 10-4 g/cm2/minute and 5.85 x 10-4 g/cm2/minute. The value of De at 100 ppm, 80 ppm, 60 ppm, 40 ppm and 20 ppm were found to be 3.249 x 10-4 cm2/minute, 3.127 x 10-4 cm2/minute, 3.107 x 10-4 cm2/minute, 3.004 x 10-4 cm2/minute and 3.524 x 10-4 cm2/minute. The value of Kc of dye at 400 rpm, 500 rpm and 600 rpm were found to be 5.999 x 10-4 g/cm2/minute, 5.85 x 10-4 g/cm2/minute and 8.369 x 10-4 g/cm2/minute. The value of De at 400 rpm, 500 rpm and 600 rpm were found to be 3.978 x 10-4 cm2/minute, 3.524 x 10-4 cm2/minute and 3.995 x 10-4 cm2/minute. The experiment result is approximated with mathematical equation This equation prevails in Reynolds Number 3000 until 5600 with average relative error 9.3114 %.
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