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Agus Mirwan
PS T. Kimia FT Unlam
Engineering

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KEBERLAKUAN MODEL HB-GFT SISTEM n-HEKSANA – MEK – AIR PADA EKSTRAKSI CAIR-CAIR KOLOM ISIAN Agus Mirwan
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.v11i1.1767

Abstract

Liquid-liquid extraction in packed column is a process of liquid phase separation in which a liquid solution (the feed) is contacted with an immiscible or nearly immiscible liquid (solvent). This type of extraction is a kind of vertical column extraction type without agitator (unagitated column) besides spray column and plate column. Good operation of liquid-liquid extraction hardly influenced by solute transfer characteristic. This characteristic can be quantification with a value so-called with mass transfer coefficient. Mass transfer coefficient is importance in order to be known in scheme of liquid-liquid extraction column and the values can be searched by using estimation models of mass transfer coefficient either in dispersion phase and also continue phase.The aim of this research is to prove model applying Handloss-Baros - Garner-Foord-Tayeban (HB-GFT) at liquid-liquid extraction process using transparent column prototype and packing type of small sphere with various of flow rate continue phase and dispersion phase at circulation drop spread (Re = 10 - 200). From this research got that packing type, droplet size, and flow rate phase (dispersion and continue) gives influence that is enough significant to mass transfer process that expressed with overall mass transfer coefficient (KOD). Flow rate and composition each phase in inlet and outlet column data are analyzed by using gas chromatography equipment (GC) that showed more and more big dispersion phase (Qd) flow rate, mass transfer coefficient (KOD) more and more small. This caused that drop diameter measure along the length of packing column assumed to be same. And model applying HB-GFT for internal circulation drop dynamics (170<Re<200) is best combination in determination of KOD with deviation standard equal to 3,2%.
Hidrolisis Karbohidrat dari Sampah Sayur dan Buah dengan Katalisator H2so4 Encer Sebagai Bahan Baku Bioetanol Doni Rahmat Wicakso; Agus Mirwan
INFO-TEKNIK Vol 9, No 2 (2008): INFOTEKNIK VOL. 9 NO. 2 2008
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v9i2.1748

Abstract

Bio-ethanol is an alternative motor fuel which environmental friendly and renewable because it can be produced from plants containing sugar, starch, and cellulose. Generally, bio-ethanol production consists  of hydrolysis process to produce sugar and fermentation process to produce ethanol. This research was to study process of carbohydrate hydrolysis of fruit and vegetable wastes by dilute sulfuric acid solution. The product of sugar solution was expected to be used as raw material of bioethanol production. The variable of experiment is temperature between 393 – 493 K. The experiment was run with 600 ml sulfuric acid 0,5 % (volume) and one hundred gram of polysaccharide waste in an autoclave. The autoclave was closed prefectly, heated and shaked.  When it reached 373 K, the time was taken as zero and sample of about 10 ml was taken. After reached desired temperature, the temperature was kept constant.  During the process, every 5 minutes, samples were taken and then be analyzed its sugar concentration by Fehling methods. The homogenous kinetics model of fist orde was used to study kinetics in this experiment. 
PENURUNAN ION Fe DAN Mn AIR TANAH KOTA BANJARBARU MENGGUNAKAN TANAH LEMPUNG GAMBUT SEBAGAI ADSORBEN Agus Mirwan; Hesti Wijayanti
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.v12i1.1777

Abstract

Indonesia, particularly Kalimantan island has abundant source of clay peat (CP). CP found as soil grain which is composed by silicon-oxygen tetrahedral and aluminium-oxygen octahedral essential form of very fine mineral. CP has ability in color removal, reducing organic matter and heavy metals which are dissolved in water through adsorption process. This research investigated the influence of adsorbent from natural peat clay, physical activated natural peat clay and chemical activated natural peat clay  with CP depth parameter (2, 3 and 4 meters from the soil surface) in adsorbing Fe and Mn from Banjarbaru groundwater. The chemical activation was done by contacting the clay peat with 0.25 M HCl , while the physical activation by burning clay peat in furnace with a temperature of 600oC for 4 hours  This research conducted by contacting the adsorbent with 1liter of water from Rambai well for 300 minutes. The results showed that the clay peat based on physical activation at a depth of 3 m gave the optimum conditions in reduction Fe, as shown from the values obtained was 0.27 mg/L, whereas chemical activation at a depth of 2 m could reduce Mn to be 0.081 mg/L. 
Pengaruh Isian Jenis Bola Kaca terhadap Dinamika Tetes dan Koefisien Pindah Massa Ekstraksi Cair-Cair dalam Kolom Isian Agus Mirwan; Doni Rahmat Wicakso
INFO-TEKNIK Vol 9, No 2 (2008): INFOTEKNIK VOL. 9 NO. 2 2008
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v9i2.1746

Abstract

Solvent extraction or Liquid-liquid extraction in packed column is a process of liquid phase separation in which a liquid solution (the feed) is contacted with an immiscible or nearly immiscible liquid (solvent). Mass transfer process occurs as effect of contact between continuous phase from above and dispersed phase from underside column. With existence of packing in column, that caused interfacial area to become bigger and residence time more and older so that improvement of mass transfer process. The aim of this research is to study drop dynamics or movement behavior of drop and mass transfer liquid-liquid extraction in packed column deputizing with overall mass transfer coefficient based on packing type of sphere. Drop shows different behavior at different packing type and height in column. The behavior will be caused changing in number of drop and drop size distribution along size column. Observation of drop behavior is done by using length square column transparent so that visually drop dynamics can be observed and recorded at every segment of column height using digital camera. This research will be done by packing type of sphere and varying flow rate of the dispersed phase to know behavior of drop. Besides this research will also be done observation of mass transfer rate from continuous phase to dispersed phase poured in the form of overall mass transfer coefficient. The research will be done by using water – MEK (methyl ethyl ketone) – n-hexane system. The result of this research for packing type of sphere shows that more and more big dispersed phase flow rate and height from under side column (distributor), hence drop is more and more small with number of which more and more many. This caused significant increase on overall mass transfer coefficient. 
Co-Authors Doni Rahmat Wicakso Hesti Wijayanti