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Performance of Silica Membranes from Fly Ash Coal of PT Semen Baturaja in Reducing Metal Content in Mine Acid Water Trisnaliani, Lety; Purnamasari, Indah; Ahmadan, Fatria
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.09

Abstract

Mine acid water has a high level of acidity as a result of oxidation of rocks containing pyrite and sulfide minerals from the remains of rocks exposed to oxygen in the water, which usually contain high metal content. One way to reduce the metal content in acid mine water is to use a silica membrane. In the study, silica membranes were made by extracting silica from fly ash by using two types of solvents or extractors, namely HCl and HNO3.  The adsorption time are 100 minutes, 120 minutes, and 140 minutes with the aim to find out which extractors can produce membranes with performance good and optimum time in the absorption of metal content from acid mine drainage. SEM analysis shows that there is no pore formed on the membrane. Based on the results of the analysis of the research conducted, it can be seen that the membrane with HCl extractor can work better in reducing metal content with optimum adsorption time in the 140th minute. Acid mine drainage also experienced a decrease in flux from 14.9283 L / m2 hours to 6.8244 L / m2h for the membrane with HCl extractor and for HNO3 membrane decreased from 11.9427 L / m2h to 7.6774 L / m2h. Keywords: Silica Membranes, Fly Ash Coal, Metal Content, Mine Acid Water, extractor 
Separation of Glycerol from Biodiesel Oil Products Using High Voltage Electrolysis Method Trisnaliani, Lety; Zaki, Ahmad
Indonesian Journal of Fundamental and Applied Chemistry Vol 3, No 1 (2018): February 2018
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i1.07

Abstract

This study aims to separate glycerol from used cooking oil biodiesel products. This research is done by main process by analyzing free fatty acid level (FFA) to know the fat content of the oil in order to know the next process. This research is done by electrolysis process using high voltage. We done transesterification process by using methanol and NaOH as catalyst before performing the process of electrolysis with high voltage. Biodiesel is manufactured using a mini-scale stirred tank reactor (RATB) laboratory. This process is heated at temperature (35-60) oC, the ratio of used cooking oil and methanol (5:1, 6:1, 7:1, 8:1, 9:1) using a 0.1 N NaOH catalyst. The research obtained optimum reaction temperature yield highest percentage of rendement at temperature 60oC and ratio of used cooking oil and methanol 5:1 with percentage of rendement equal to 88,88, cetane number 48,4, kinematic viscosity 2,560, pour point 37,4 oF, flash point 131 oF, Conradson Carbon Residue (CCR) 0.09, and ASTM Colour 1.5. This shows that the manufacture of biodiesel with high microwave and high voltage utilization yields a high percentage of 88.88 and the product is biosolar-48.  
THE DESIGN OF ACE (ALUMINUM CORROSION AND ELECTROLYSIS) REACTOR AND ITS PERFORMANCE TO PRODUCE HYDROGEN FROM BEVERAGE CANS Zikri, Ahmad; ., Erlinawati; Trisnaliani, Lety; Wulandari, Daya
Reaktor Volume 17 No. 4 Desember 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (450.956 KB) | DOI: 10.14710/reaktor.17.4.210-214

Abstract

AbstractThe reaction of aluminum (Al) with an alkaline solution in producing hydrogen gas has been known for a long time. This aluminum corrosion reaction has a major obstacle in the passivation phenomenon, a formation of aluminum oxide coating on the metal surface that prevents aluminum from collapsing. Integration of electric current to the potassium hydroxide solution could result in electrolysis of water which increases the production of hydrogen. This process was carried out continuously in an ACE (aluminum corrosion and electrolysis) reactor of water. This reactor design enabled to produce hydrogen and oxygen in separating chamber. The use of 10 g of cans, 0.02 M gallium, 12 VDC, and 0.8 M KOH obtained the maximum production rate of hydrogen 162.58 ml/s with a purity of 79.83%. Keywords: aluminum corrosion; hydrogen; water electrolysis
PALM OIL INDUSTRY WASTE WATER TREATMENT WITH COAGULATION METHOD, FENTON AND ADSORPTION Jauhari, Taufiq; Trisnaliani, Lety; Purnamasari, Indah
KINETIKA Vol 4, No 2 (2013): KINETIKA 01072013
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8.143 KB)

Abstract

Crude palm oil waste water is waste water that resulted from the palm oil industry. If crude palm oil waste water is released to environment, so it can decrease enviromentset quality  because it contains pollutant organic compound. In this research waste water crude palm oil processed using alum as coagulant with dosage 5000 ppm. This step process was continued by using the concentration fenton Fe2SO47H2O 0.004 M and concentration H2O2 0.32 M. In the final process waste water was treated  by adsorpstion active carbon columb of 30 cm, 40 cm and 50 cm and flow rate 80 mL/minute, 110 mL/minute and 140 mL/minute. In flow rate of  80 mL/minute and height activated carbon columb 50 cm the BOD, COD and TSS reduction increased until 70.10 %, 59.37 % and 85.69 % respectively.
PENGARUH UKURAN PARTIKEL TERHADAP KECEPATAN ADSORPSI KARBONISASI DENGAN MENGGUNAKAN METODE ANALISA ISOTERM FREUNDLICH PADA PEMBUATAN KARBON AKTIF BATUBARA LIGNIT Trisnaliani, Lety
KINETIKA Vol 8, No 2 (2017): KINETIKA 01072017
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.767 KB)

Abstract

Karbon aktif adalah material yang berbentuk butiran atau bubuk yang berasal dari material yang mengandung karbon misalnya pada batubara, kulit kelapa dan sebagainya. Dalam penelitian isoterm adsorpsi arang aktif digunakan larutan asam asetat dalam berbagai variasi konsentrasi yaitu 1 N, 0.8 N, 0.6 N, dan 0.4 N bertujuan untuk mengetahui kemampuan arang untuk mengadsorpsi larutan asam asetat dalam berbagai konsentrasi pada temperatur konstan. Persamaan grafik Isotherm Adsorpsi Freundlich untuk karbon aktif dengan aktivasi tanpa karbonisasi adalah y = 0,9999x - 0.7787, sehingga didapat nilai Log k = -0.7787 dan 1/n = 0,9999. Maka nilai k adalah 0.1665 dan nilai n adalah 1,0001. Sedangkan persamaan grafik isotherm adsorbsi freunlich untuk karbon aktif dengan aktivasi dengan karbonisasi adalah y = 1,0003x - 0.78, sehingga didapat nilai Log k = -0.78 dan 1/n = 1,0003. Maka nilai k adalah 0.165 dan nilai n adalah 0,9997. Grafik ini sudah mendekati teori isotherm adsorpsi Freundlich yaitu grafik berupa garis linear.
STUDI TEKNOLOGI PERENGKAHAN PANAS DAN PENJENUHAN TRIGLISERIDA CRUDE PALM OIL PADA KONDISI BASA DENGAN TWO STAGES ELECTROCHEMICAL THERMAL CRACKING REACTOR Trisnaliani, Lety; Purnamasari, Indah
KINETIKA Vol 5, No 1 (2014): KINETIKA 01032014
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

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Abstract

The study was experienced using electrolyze by using two stages electrochemical thermal cracking reactor, zeolyte  as catalyst, silver as cathode and cuprum as anode. In this research, we used electrolyte solution for 2 kinds of pH  which  was  pH  10  and  pH  12  of  Potassium  Hydroxide  (KOH)  and  different  voltage  which  was  2,4,6,8,10  and  12  volt.  It  worked  in  1  atmosphere  with  electrolyze  for  1  hour,  heating  till  reaching  temperature  80 oC  for  1  hour, fogging process for 1 hour, and heating without electrolyze nor fogging about 30 minutes. From lubricity analyze,  this product is a fuel with high lubricity. The analyzer showing that cracking of triglyceride of crude palm oil has  same characteristics with diesel.
ACTIVATED CARBON PRODUCT QUALITY DEVELOPMENT BASED SHELL OIL PALM USING THE ACTIVATOR OF ZnCl2 Trisnaliani, Lety
KINETIKA Vol 8, No 1 (2017): KINETIKA 01032017
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

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Abstract

PT. Sawit Mas Sejahtera is a limited liability company whose efforts include oil palm plantations and palm oil mills. Waste generated is CPO (22.5%), Kernel (5.5%), Empty Bunch (21%), Fibre (12.5%), Shell (6.5%) and effluent (55%). The method used in this research is to utilize palm shell as a raw material preparation active carbon with the activation process. As for the preparation of activated carbon depends on the addition of activator ZnCl2 with variable concentrations of 5% to 25%. Based on the analysis that has been set, it can be concluded palm shells can be processed into activated carbon and activated carbon obtained the best on the size of 200 mesh and a concentration of 20% with a water content of 8.80%, ash content of 4.28%, the absorption of iodine 997.97 mg / L.
BIODIESEL PROCESS PRODUCTION FROM WASTE COOKING OIL USING MICROWAVES AND HIGH VOLTAGE Trisnaliani, Lety; Moulita, RA Nurul
KINETIKA Vol 8, No 3 (2017): KINETIKA 01112017
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (313.529 KB)

Abstract

Increasing fuel demand has an impact for decreasing fossil energy reserves. One of the government ways to solve this problem is by increasing the production of biomass fuels, for example biodiesel. Biodiesel can be produced from waste cooking oil through the transesterification stage that reacts oil molecules with alcohol and catalyst to produce methyl esters. Heating method that can be used is microwaves method. This method utilizes wave emission which is absorbed by the sample to make sample?s temperature being higher than surface?s temperature of the reactor?s wall. In the process of making biodiesel, there are several factors that affected heating process. There are ratio of waste cooking oil and methanol, an amount of catalyst, reaction temperature, voltage, and distance of electrodes. The effect of that factors can be seen from the result of the biodiesel?s rendement. From this research, we had ratio 5:1 of waste cooking oil and methanol got 85,. % rendement, 2% of catalyst got 87.12% rendement, 60oC reaction temperature got 88.88% rendement, 10 kV got 89.12% rendement, and 1 cm of electrode?s distance got 86.34% rendement. This result suggests that a biodiesel production prototype with microwaves and high voltage utilization can produce a high percentage of biodiesel rendement
STUDY OF THE INFLUENCE THE ACIDITY LEVEL OF SULPHURIC ACID TO THERMAL CRACKING AND TRIGLYCERIDE SATURATION OF CRUDE PALM OIL BY USING TWO STAGES ELECTROCHEMICAL THERMAL CRACKING Trisnaliani, Lety; Jauhari, Taufiq
KINETIKA Vol 4, No 2 (2013): KINETIKA 01072013
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8.45 KB)

Abstract

Crude Palm Oil (CPO) was experienced with electrolyze by using two stages electrochemical thermal cracking reactor, zeolyte as catalyst, silver as cathode and cuprum as anode. In this research, we used electrolyte solution for 2 kinds of concentrate which was 40 and 60% of sulphuric acid (H2SO4). It worked in 1 atm with electrolyze for 1 hour, heating till reaching temperature 80oC for 1 hr, fogging process for 1 hr, and heating without electrolyze nor fogging about 30 minutes. From lubricity analyze, this product is a fuel with high lubricity. The analyzer showing that cracking of triglyceride of crude palm oil has same characteristics with diesel.