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INDONESIA
Seminar Nasional Teknik Kimia Kejuangan
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science
Prosiding Seminar Nasional Teknik Kimia Kejuangan adalah media online dari makalah yang telah diseminarkan pada acara Seminar Nasional Teknik Kimia “Kejuangan” (SNTKK). SNTKK merupakan agenda tahunan yang diselenggarakan oleh Program Studi Teknik Kimia FTI UPN ”Veteran” Yogyakarta. Seminar ini merupakan sarana komunikasi bagi para peneliti dari perguruan tinggi, institusi pendidikan, serta lembaga penelitian maupun industri, dalam mengembangkan teknologi kimia untuk pengolahan sumber daya alam Indonesia.
Arjuna Subject : -
Articles 588 Documents
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Imobilisasi Limbah Radioaktif Uranium Menggunakan Abu Batubara Sebagai Bahan Matriks Synroc Gunandjar Gunandjar
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

The Immobilization of Uranium Radioactive Waste Using Coal-Ash as Matrix Material of Synroc. The decommissioning of Phosphoric Acid Purification Facility – Petro Chemical of Gresik (PAPF-PCG) generates radioactive liquid waste containing uranium. The waste was treated by bio-oxidation process using bacteria for volume reduction of the waste to become radioactive sludge waste. The sludge waste contains uranium is included the classification of long-life alpha radioactive waste. The sludge waste must be immobilized by solidification process for preparation of disposal to ensure the safety of the environment in the present and future. In this research aim to immobilization of the radioactive sludge waste by solidification using coal-ash as matrix material of titanate synroc. Immobilization process was carried-out by mix the radioactive sludge waste with coal-ash and precursor oxides namely BaO, CaO, and TiO2 as addition of matrix materials. The composition of matrix material of synroc using coal-ash and addition of precursor oxides (in weight %) i.e : Al2O3 (6.26); BaO (5.33); CaO (10.52); TiO2 (68.02) ; and SiO2 (6.07). Beside that the matrix material contains oxides minor (in weight %) i.e : Fe2O3 (3.48), MnO2 (0.04), K2O (0.20) and Na2O (0.08). Waste loading in the waste synroc block was 30 weight %. The mixture then was dried at temperature of 130 oC, and calcined at 750 oC. The powder of calcination result then was pressed in the molder. Furthermore, the sintering process was carried out at the temperature of 900 – 1300 o C for 3 hours to form the solid multiphase ceramic of synroc block. As a comparison was done immobilization process using matrix material of standard synroc. The quality of the synroc block produced from immobilization was determined by testing of density, compressive strength, and leach-rate ((the accelerated leach-rate at temperature of water 100 oC)). The test results showed that the best quality of waste synroc block was obtained at the sintering temperature of 1100 oC for 3 hours with values of density 2.28 g/cm3, compressive strength 5.57 kN/cm2, and leach-rate of uranium is 1.05x10-6 g.cm-2.day-1. This leach-rate of uranium is lower than the standar waste synroc block 1.17x10-5 g.cm-2.day-1. The quality of the waste synroc block produced by sintering process has fulfill the recommendation of IAEA.
Sistem Integrasi Koagulasi dan Adsorpsi dalam Reduksi Logam Berat (Cr6+ dan Cu2+) pada Limbah Cair Industri Tekstil Judy RB Witono
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

The activated sludge method is the mostly method used in textile industry wastewater treatment. This method can not eliminate the heavy metal ion, needs a huge area and skillfull operators. Therefore, this research will developed a physical and chemical integration method, i.e. coagulation method (with alum and FeSO4) and adsorption method (with activated fly ash). In this research we used an artificial wastewater contains metal salt solution of Cr(VI) and Cu(II). Fly ash adsorbent were made by carbonization at temperature 400oC and 600oC in 1 hour, and activated with 12M, 9M and 6M HCl and NaOH. The variable observed in the coagulation method was the mass ratio of alum : FeSO4 (1:0; 1:1; 0:1). The performance of the system was measured based on the concentration reduction of Cr(VI) and Cu(II) by spectrophotometry.The best adsorbent for Cr(VI) is fly ash which carbonized at 600°C and activated by 12 M HCl (49.48% reduction), while for Cu(II) is at 400°C and 12 M NaOH (91.16% reduction). The best coagulant for Cr(VI) is FeSO4 (28.21% reduction), while for Cu is a mixture of alum:FeSO4 (75.83% reduction). The integration of coagulation-adsorption process is suitable only for reducing ion Cu2+ (99.72%).
Pembuatan Serbuk Perak dengan Metode Reduksi Presipitasi Kimia dan Pasta Perak untuk Aplikasi Kontak Metal Sel Surya Silikon Yunus Tonapa Sarungu
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Utilization of natural solar energy needs supporting technology to obtain maximum contertion of solar energy. Therefore, there its need to design a medium to absorb photothermal energy for further application. In this research, Synthesis of Silver Powder Using Chemical Reduction-Precipitation and Silver Paste for Metal Contacts Solar Cell Application The making of silver powder using precipitate reduction method with raw material from silver nitrate. Silver nitrate reduced by ascorbic acid then added by arabic gum as dispersant and potassium sulfate as modifier. PH of silver nitrate and reduction solution is kept by using HNO3. Reaction is happened at 25 oC (RTP). The purity of silver powder as result of reduction is analyzed by SEM (Scanning Electron Microscopy) & EDS (Energy Dispersive Spectroscopy) and XRD (X-ray Diffraction) and XRD (X-ray Diffraction). Result SEM (Scanning Electron Microscopy) & EDS (Energy Dispersive Spectroscopy) show that silver powder have purity almost 100 % with spherical particle. Result XRD (X-ray Diffraction) show that system crystal silver powder same with system crystal pure silver powder. Silver powder used for making silver paste with ethylene glycol, butyl acetate as solvent; hidroxy ethyl cellulose as resin binder; triton as additive; and silicate as glass frit. Metallization process of silver paste on silicon is carried out by screen printing method. The silver paste which has been metalized on silicon is analyzed using FPP (Four Point Probe) to know silver paste sheet resistivity. Result of analyze showing that silver paste has sheet resistivity 85,8 mΩ/sq.
Microwave-Assisted Deacetylation of Chitin from Shrimp Shells Zainal Arifin
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

The microwave has been used for various applications of organic synthesis. Microwave was used in this  study in order to transform chitin to chitosan. Theprocess of deacetylation of chitin was done by varying heating time 3, 7, 11, and 15 minutes under of power of 400 W. Two grams of chitin were mixed with 40 mL of NaOH solution 70% in a beaker glass. The mixtureput into the apparatus microwave in constant temperature at 70°C. Chitosan was washed until neutral and then was dried in oven. The Degree of Deacetylation (DD) were analyzed using Fourier Transform Infrared (FTIR) instrument. The results that showed the degree of deacetylation is 85.32% was achieved at reaction time in 15 minutes. The parameters of chitosan such as moisture content, ash content,  and viscosity were obtained 9.23%, 0.16% and 58.05  cP, respectively.
Sifat Fisikokimia Pati Sorghum Varietas Merah dan Putih Termodifikasi Heat Moisture Treatment (HMT) untuk Produk Bihun Berkualitas Kristinah Haryani
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Utilization of sorghum as food, especially as an ingredient of bihon noodles, is still very limited, even though this plant is very potential to be developed in Indonesia. This study was conducted to produce sorghum starch as an ingredient of bihon. In this researcha modification of starch was conducted by applyingheat moisture treatment (HMT) method that is able to convert starch type A to type B and even C, i.e. by heating starch with a limited water content at a temperature above the temperature of gelatinization until an arrangement of crystalinity conformation occured without gelatinization. The HMT process was carried out on the water content of 18%, 21%, 24%, 27% and 30%,at temperature of 80, 90, 100, 110 and 120 centigrade, and interval time of 4, 8, 12, 16 and 20 hour respectively. It was found that a relatively good condition at the HMT process with moisture content of 21%, temperature of 100 centigrade and heating time of 12 hour obtainning solubility of 1.67%, flower power of 4,16g/ gand resembles rice starch, in doing so it can be used as a substitute for rice starch in the making of bihon noodles.
Studi Biobriket Enceng Gondok (Eichhornia Crassipes) sebagai Bahan Bakar Energi Terbarukan Eko Ariyanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Depletion of fossil energy reserves as a result of increased population growth and industrial sectors. Biomass can be considered as the best option for alternative renewable energy. The objective of this study was to investigate the possibility of water hyacinth (Eichhornia crassipes) to produce bio-briquette. The briquetting experiment was conducted with different both of tapioca strach and wood glue adhesive. The presentage of adhesive was 4%, 6%, 8%, 10%, and 12%. The briquettes were tested to evalueted water content, ash content and calorific value. The results showed that the value of water content and ash content increased by increasing presentage adhesive on bio-briquete. However, the calorific value reached the maximum point of 10 % and 8 % for addition tapioca strach and wood glue adhesive, respectively.
Penyusunan Kriteria Pemilihan Proses Flue Gas Desulfurization PLTU-Batubara Herri Santoso
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Approximately 42% (29 GWh/year) of electricity in Indonesia is produced from coal-fired power plants with coal consumption of about 45 million ton/year. Anticipating the increase in coal consumption for fuel in power plants and industries, as well as the decrease in coal quality in terms of heating value and sulfur content, application of flue gas desulfurization (FGD) will be a mandatory in the near future. Characteristics of several FGD technologies are shortly discussed in this paper. Based on this study the criteria for the selection are as follows: capacity and location of the power plant, concentration of SO2in flue gas and specific emissions of SO2 which depends on coal quality, separation efficiency, chemicals requirement and by-product, reliablity and commercial status of technology, and of course investment, operating and maintenance costs. These criteria will be used in the Analytic Hierarchy Process to determine a suitable technology for a particular coal power plant.
Karakterisasi dan Sifat Biodegradasi Edible Film dari Pati Kulit Pisang Nangka (Musa Paradisiaca L.) dengan Penambahan Kitosan dan Plasticizer Gliserol Zakiah Drajat Nurfarjin
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Banana peel is an unused material from the rest of food production that made from banana, have no selling value, and easy to get. A lot content of starch that found in a banana peel can be used as raw material for making edible film which is interesting solutions as a innovative food wrapper. Starch from banana peel were chosen because they can be degraded well, and eatable. Edible films prepared by dissolving starch 10 g in 100 ml of aquadest at a temperature of 65 °C to 70 °C then stirred 1 hour. Chitosan variables are 0,5gr, 1 gr, 2 gr, 2,25gr, and 2,5gr. And glycerol variables are 2ml, 4ml, 5ml, and 6ml. The analysis includes tensile strength and percent elongation. Then continued with the biodegradable analysis for 40 days. Good composition for this edible film are 10 gr starch, 100 ml acetic acid 1%, 2 gr chitosan, and 5 ml glycerol with the result of tensile strength is 43.3953 kg/cm2 and 14 % for percent elongation. Edible film could degraded well at day 28 with the rate of CO2 production 178.2 mg /day. So this edible film proved more eco friendly than synthetic plastic.
Simulasi Termodinamika Perengkahan Tar pada Keluaran Fixed Bed Gasifier Herri Susanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Gasification is process to convert solid fuel such as biomass to gaseous fuel. Gasification produces synthetic gas which can be used as fuel, or feedstock for chemical synthesis. Tar production is one of major problem in gasification. Tar can be reduced by steam reforming of producer gas and modification of gasifier’s configuration. Gasifier and tar catalytic cracking reactor configurations and operating conditions are studied by using equilibrium thermodynamic model for steam reforming process. Steam/tar mole ratio and operation temperature must be taken into consideration to minimize tar production and prevent coke formation in catalyst. Simulation result can give guidance about operating condition of steam tar cracking reactor and guidance for gasifier configuration to minimize tar production. Simulation results showed that in order to eliminate tar and prevent coke formation, tar cracking reactor minimum temperature of 500-700oC should be used for downdraft gasifier, 662-756oC for conventional updraft gasifier, and 648-715oC for modified downdraft gasifier depending on steam/tar ratio in tar cracking reactor feed.
Preparasi dan Karakterisasi Katalis Co/Zeolite Y and Co-Mo/Zeolite Y untuk Konversi Tar Batubara Didi Dwi Anggoro
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Tar batubara (Coal tar) dapat dikonversi menjadi bahan bakar cair dengan prosesperengkahan hidrogenasi (Cracking Hydrogenation). Proses ini memerlukan katalis yang mempunyai fungsi ganda yaitu komponen logam sebagai katalis hidrogenasi dan komponen asam sebagai katalis perengkah. Pada penelitian ini dibuat katalis Co/Zeolit Y dan Co-Mo/Zeolit Y dengan variabel adalah berat Co dan Mo dengan metode impregnasi. Desain eksperimen ditentukan menggunakan bantuan Software Statistica. Dari analisa XRD dapat disimpulkan bahwa dengan penambahan logam Co dan Mo mempengaruhi persen kristallinitas. Penambahan logam Co menurunkan kristallinitas, sedangkan penambahan Mo menaikkan kristallinitas. Hasil analisa luas permukaan menggunakan BET Surface Area Analizer menunjukkan bahwa dengan penambahan Co dan Mo menyebabkan penurunan luas area. Hal ini dibuktikan dengan analisa SEM yang menunjukkan bahwa logam Co dan Mo banyak menempel dipermukaan dan pori-pori katalis, sehingga mempengaruhi persen kristallinitas dan luas permukaan. Sedangkan dari analisa keasaman menggunakan gas ammoniak menunjukkan dengan penambahan logam Co dan Mo mengakibatkan peningkatan keasaman.

Page 8 of 59 | Total Record : 588

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