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All Journal Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri

Zultiniar Zultiniar

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Author-ID : 3011244

Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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INHIBITOR POLIFOSFAT UNTUK MENGENDALIKAN KOROSI PADA PIPA SISTEM PENDISTRIBUSIAN AIR Komalasari Komalasari; Zultiniar Zultiniar
Jurnal Sains dan Teknologi Vol 13, No 1 (2014): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Dalam proses industri sering terjadi masalah, salah satunya adalah adanya kebocoran/penipisan pada alat prosesproduksi yang disebabkan oleh korosi. Korosi merupakan proses kerusakan/degradasi pada material akibat berinteraksidengan lingkungan. Salah satu cara pencegahan korosi adalah dengan menambahkan inhibitor. Inhibitor adalah senyawakimia yang dapat mengendalikan atau memperlambat proses korosi. Polifosfat merupakan salah satu inhibitor yang baikuntuk mengendalikan laju korosi. Inhibitor polifosfat dapat mengurangi aktivitas proses korosi dan tidak menyebabkankerusakan pada material dan lingkungan. Penelitian ini bertujuan untuk mengetahui dan mempelajari pengaruh inhibitorpolifosfat dalam mengendalikan korosi pada pipa air, menghitung laju korosi yang terjadi pada bahan logam tanpainhibitor dan memakai inhibitor serta mengetahui jenis logam yang baik dan tahan korosi agar dapat digunakan padaalat proses industri. Penelitian ini dilakukan dengan cara merendam coupon corrosion (besi, stainless steel, danaluminium) selama 1 minggu di dalam larutan NaCl dengan berbagai konsentrasi yang berbeda (500, 5000, 15.000, dan30.000ppm), tanpa inhibitor dan dengan menggunakan inhibitor polifosfat dengan berbagai konsentrasi polifosfat (50,100, 200, 300, dan 400ppm). Hasil dari penelitian ini diperoleh untuk uji tanpa inhibitor bahwa semakin tinggikonsentrasi NaCl maka laju korosi semakin meningkat pada berbagai coupon korosi. Sedangkan untuk uji denganmemakai inhibitor polifosfat, laju korosi menurun sampai pada titik konsentrasi NaCl 300ppm pada berbagai couponkorosi. Laju korosi yang tertinggi diperoleh pada logam besi dibandingkan dengan aluminium dan stainless steel. Lajukorosi yang terendah terjadi pada stainless steel.Kata Kunci : Inhibitor, Inhibitor Polifosfat, Korosi

PERENGKAHAN KATALITIK LIMBAH PLASTIK JENIS POLYPROPYLENE (PP) MENJADI BAHAN BAKAR MINYAK MENGGUNAKAN KATALIS ZEOLIT A Aldi Okta Priyatna; Zultiniar Zultiniar; Edy Saputra
Jurnal Sains dan Teknologi Vol 13, No 1 (2014): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Pada penelitian ini telah berhasil mensintesis zeolite A dari fly ash. Karekterisasi katalis dilakukan dengan X-ray diffraksi (XRD). Aktivitas katalis zeolite A diuji pada perengkahan limbah plastik menjadi bahan bakar minyak. Dari hasil penelitian didapat, yield bahan bakar minyak terbaik diperoleh pada penggunaan katalis 1,5% Zeolit A dengan suhu 450oC selama 60 menit, yaitu sebesar 76,82%. Selain itu, hasil uji fisika diperoleh yaitu, densitas 0,776 gr/ml, dan nilai kalori 10.256 kal/gr. Senyawa kimia paling dominan adalah gasoline 39,80% dan kerosin-diesel 32,65%.Kata Kunci : Bahan bakar minyak, Perengkahan Katalitik, Plastik, Polypropylene, Zeolit A

Perengkahan Katalitik Palm Fatty Acid Distillate Menjadi Biofuel Menggunakan Katalis Natrium Karbonat Dengan Variasi Temperatur Dan Konsentrasi Katalis Natrium Karbonat Muhammad Yusro Annur; Yelmida Yelmida; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Oil Fuel consumption in indonesia is very high and keep increasing every year, but not in balance with total supplies of fuel oil so biofuel as alternative fuel is needed. Biofuels can be produced by catalytic process palm fatty acids destilat (PFAD) using catalysts sodium carbonate (Na2CO3). The purpose of this research it to get highest yield in the process of making biofuel with variations of temperature (350oC – 430oC), concentration catalyst (0,5-2,5 % wt), weight feed PFAD 150 grams and flow rate of N2 150 ml/s. The results test of catalytic process obtained by conversion highest value of 37,66 % in temperature 410 oC and catalyst concentration Na2CO3 2% wt. wiht composition 38,37% gasoline, 12,79% kerosene and 30,61% diesel, while at catalyst concentration Na2CO3 1% wt. obtained yield 31,77% with composition 38,37% gasoline, 12,79% kerosene and 30,61% diesel. Dominant composition results in this research are kerosene and gasoline fraction.Keyword : Biofuel, Cracking, Gasoline, Kerosene, PFAD

Sintesis Hidroksiapatit Dari Limbah Kulit Kerang Lokan (Geloina Expansa) Dengan Metode Hidrothermal Mohd Fazhlur Arrafiqie; Yelmida Azis; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Hydroxyapatite Ca10(PO4)6(OH)2is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas and the principal inorganic constituent of bones and teeth. Hydroxyapatite (HAp) materials used as bone implants, adsorbents and catalysts. In this research synthesis of hydroxyapatite can be made by using material which is rich of CaCO3 like PCC lokan calm shell with a composition of 99.45% CaCO3. PCC lokan calm shell which has calcium source was synthesized to HAp by hydrothermal process with varied times of the reaction (12 hours, 16 hours, 20 hours) and reaction temperature (140oC, 160oC, 180oC).HAp synthesized result has been analyzed using X-ray Diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis, synthesisof Hap with hydrothermal method through precipitated calcium carbonat (PCC)showedthe formation of hydroxyapatite in the presence of peaks PO43- dan OH-.The highest peakis obtained at reaction temperature 140oC at reaction times of, 12 hours, 16 hours, 20 hours. XRD diffraction results in hydroxyapatite get the highest purity obtained at temperature of 140oCat time of 20 hour with a hexagonal crystal structure. The results of SEM-EDX analysis, show that the morphological form of agglomerates or clumping . The molar ratio of Ca / P of hydroxyapatite which is made from seashells waste through the PCC is 1,58.Keywords: PCC Lokan Calm Shell, pH, Temperature, Hydroxyapatite, Hydrothermal Method.

Pembuatan Biodiesel Berbahan Baku CPO Menggunakan Reaktor Sentrifugal dengan Variasi Rasio Umpan dan Komposisi Katalis Ardago Lengga Muda Siregar; Idral Idral; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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One of many sources of alternative fuel is biodiesel . Biodiesel production cost is still quite expensive, it need a technology to reduce thecost of biodiesel production . Centrifugal reactor technology is one of the alternative technology of biodiesel production, which is very likely to be developed .Study of biodiesel production using palm oil as the feedstock, methanol as the reagent, and NaOH as catalyst.This research use centrifugal reactor as the reactor, which has a pre-heater for feed, feed tank and pumps. The study was conducted at the reaction temperature of 60ºC with a residence time in the reactor for 2 hours . CPO mixture , methanol , and a catalyst in the feed the reactor with variation in the molar methanol : CPO ( 3:1 , 6:1 , 9:1 , 12:1 ) and the variation of the composition of the catalyst ( 0.5, 0.75, 1 % - w ) . From the results of the study showed that the molar ratio and catalyst composition affects the speed of the reaction to reach equilibrium reaction . The results showed biodiesel using centrifugal reactor reaches a yield of 92.6 % under the conditions of 9:1 molar ratio with 0.75 %-w catalyst . Characteristics of biodiesel produced in the form of viscosity , density , acid number , and flash point of biodiesel are qualified as Indonesian standards of Biodiesel.

Pengaruh Penambahan Wheat Particles Dan Waktu Sintering Pada Fabrikasi Tricalcium Phospate Dengan Metode Starch Consolidation Rathesa Najela; Ahmad Fadli; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Tricalcium phosphate (TCP) is a porous material that can be used as a bone substitute. One method of making the porous TCP is starch consolidation using wheat particles. This researchaims to determine the effect of composition of wheat particles and sintering time on physical, chemical and mechanical TCP porous prepared by starch consolidation method. Wheat particles with variation of 4 g, 6 g and 8 g mixed with TCP suspension and then stirred for 3 hours. Slurry was dried in an oven at 80oC for 24 hours and 120oC for 8 hours. The dried green bodies inserted into the furnace where the combustion process occured at a temperature of 600oC for 1hour, followed by sintering at a temperature of 1100oC with variation of 1 hour, 2 hours and 3 hours. The results show that more addition of starch cause high shrinkage and porosity with low density and compressive strength. While for long sintering time lead to decline porosity with high shrinkage, density, and compressive strength. Produced sintered body in the addition of starch 4 g with sintering time of 3 hours showed 48.32 % shrinkage with 45.56 % porosity and 5.002 MPa compressive strength.Keyword : compressive strength, porosity, tricalcium phosphate, wheat particles

Metode Penukar Ion Dalam Penyisihan Ammonia Air Lindi Tpa Muara fajar Dengan Variasi Waktu Kontak Dan Ukuran Tanah Lempung Khodijah Khodijah; Shinta Elystia; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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water into the garbage heap that comes from rain water, drainage channels, ground water, or other resources available around Muara Fajar landfill. Shelters Muara Fajar landfill leachate potential to generate waste that seeps into the ground and flows on the surface of the soil around the landfill. Leachate originating from shelters litter may result in increasing levels of environmental pollution in the vicinity of Muara Fajar landfill. Has done research methods ammonium ion exchangers in isolation Muara Fajar landfill leachate with contacts and measure the time variation of clay. This study aims to determine the parameters of pollutant removal efficiency of ammonia (NH3) by ion exchange method using clay and compares the characteristics of leachate treatment with quality raw KEPMENLH / 51/10/1995. This study uses clay size variations -5 + 10; -10 + 15; -15 + 20 mesh and 60 contact hours; 120; 180 minutes. The analysis shows that the leachate characteristics of NH3 concentration 38.69 mg / L indicating a high enough quality and more than raw (Minister of Environment Decree No. 51 of 1995). Having done the flow of leachate recovered pollutant concentrations decrease. Factors influence size variations of clay and contact time effect on the efficiency of reduction of concentration, the larger the mesh size (smaller diameter clay) then recovered the high efficiency of the concentration of pollutants. The results showed that the efficiency was high in clay size -15 + 20 mesh and 180-minute contact time gives the best removal efficiency of 91.12% NH3. While the efficiency of the lowest available in the size clay -5 + 10 mesh that is Ammonia of 17.13%. Cation exchange capacity of 105 earned meq / 100 g sample.Key Words: leachate, Ion exchange, clay land

Degradasi Zat Warna Tekstil (Rhodamin B) Dengan Teknologi Aop (Advanced Oxidation Process) Metode Fotokatalitik Menggunakan Katalis Nanokomposit Znfe2o4/SBE Affananda Taufik; Zultiniar Zultiniar; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Dyestuffs which the result of the textile industry are non-biodegradable organic compounds, can cause environmental pollution especially the aquatic environment. One alternative to processing textile waste is to use the photocatalytic. Photocatalytic is a process of combination of catalyst and light. This study aims to synthesize ZnFe2O4 / SBE catalysts with microwave methods and characterization, study the influence of process conditions in degradation and determine the best process conditions in dye degradation. Nanocomposites from ZnFe2O4 / SBE have been successfully synthesized using the microwave method. The catalyst synthesis process is carried out by microwave for 20 minutes and followed by calcination at 500oC for 5 hours. Photocatalytic degradation lasted 120 minutes, stirring speed 350 rpm and volume of 250 ml solution. The variation of ZnFe2O4 / SBE concentration was 1.5 g / L, 1 g / L, 0.5 g / L and 0.25 g / L and the showed the maximum results from the best photocatalytic process obtained from variations in the catalyst concentration of 1.5 g / LKeywords: photocatalytic, rhodamine b, znfe2o4/sbe

Uji In-Vitro Hidroksiapatit Berpori Menggunakan Larutan Simulated Body Fluid (SBF) Dengan Variasi Penambahan Pati Kentang Deska Deska; Ahmad Fadli; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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One method of biological hydroxyapatite testing is in vitro, which is testing material outside the system or not directly on living things. Some ways include using cell culture media, test tubes or Simulated Body Fluid (SBF) solutions. The purpose of this study was to test in-vitro porous hydroxyapatite with variations in potato starch using a Simulated Body Fluid (SBF) solution. This research was conducted by mixing 4 and 6 grams of potato starch with 12 grams of HA, 35 mL aquadest. The slurry is stirred at 150 rpm for 3 hours. Then the slurry is put into a mold and dried in an oven at 80˚C for 24 hours and 120˚C for 8 hours. The dried green bodies are burned at 600°C and the sintering process at 1250°C. Furthermore porous hydroxyapatite was soaked using the SBF solution for 28 days. Samples were analyzed using XRD analysis and SEM analysis. Based on SEM analysis apatite layers were formed in all samples. Samples had an average pore diameter of 96.66 μm and 105.8 μm. Where the crystallinity value of the samples obtained by 73.75% and 77.19%. The addition of potato starch to the sample can enlarge pore diameter, facilitate ion exchange and increase sample resistance during the immersion process using SBF solution.Keywords: potato starch, hydroxyapatite, Simulated Body Fluid, in-vitro test

Studi Pendahuluan Penggunaan Katalis Logam-HAp Pada Pembuatan Biodiesel Syafruddin Syafruddin; Yelmida Azis; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The safety and sustainability of an energy source, along with biodegradability is a parameter whether an alternative energy considered successful or not. Currently, biodiesel is an environmentally friendly and has low manufacturing cost. Biodiesel cathegorized as fatty acid methyl esther (FAME) which is generated from fat or oil. In this research, palm fatty acid destillate (PFAD) is used as raw material to produce biodiesel. PFAD is converted into FAME through single stage estherification. This estherification reaction combine 25 gram of PFAD with 97 gram of methanol with mixing rate of 350 rpm at 60˚C for 1, 2, and 3 hours. 0,25 gram of metal-hydroxyapatite catalyst (Cu-HAp, Co-HAp, Ni-HAp, dan HAp) will assist in the process of converting PFAD into FAME. The focus of this study is the effect of time and type of metal-HAp on the conversion of PFAD into FAME. The highest yield of biodiesel is acquired at the usage of (3%) Cu-HAp catalyst for 3 hours. Physical test result has fulfilled SNI 04-7182-2006 which includes 0.84 g/ml density, 4.8 cSt viscosity, 120 ˚C flash point, 61.48% yield, acid number of 0.73 mg KOH/gr oil. Based on the GC-MS (Gas Chromatography-Mass Spectrometer) analysis, the main component of the PFAD-based biodiesel is 53.1% hexadecanoic methyl esther, 32.81% 9-octadecanoic methyl esther and 5,93% 9,12-octadecadinoic methyl esther.Keywords: Biodiesel, Estherification-transestherification, Methanol, Metal-HAp catalysts, PFAD

Co-Authors Affananda Taufik Affandi Affandi Ahmad Fadli Aldi Okta Priyatna Amun Amri Ardago Lengga Muda Siregar Ari Wibowo Harahap Bahruddin Bona Tua Deska Deska Dewi Indah Pratiwi Dhini Octavianty Dian Anggraini Purba Dini Aulia Sari Ermal Dovy Reyandi Ekky Wahyudi Fachry Abda El Rahman Fadly Sitohang Hafiz Hafiz Idral Idral Indah Fitriani Jefry Soclin Sianipar Juniwarnis Juniwarnis Khamaluddin Aditya Khodijah Khodijah Komalasari Komalasari Lucy Rahmawati M. Fauzan Akbar Mohd. Rafiq Muhammad Yusro Annur Nurrassyidin Nurrassyidin Nuruzzaman Shiqhi Paul Destin Purba Putri Fatihah Zuhrah Rathesa Najela Regina Giantika Resty Maiyola Riris Verawati Roselyn Indah Kurniati Rozanna Sri Irianty Shinta Elystia Siska Priscillia Aledya Siti Sakinah Sri Hidayanti Sry Utami Pardede Sudung Sugiarto Siallagan Syafrima Wahyu Syafruddin Syafruddin Utami Khairunnisa Widiya Widiya Widya Pangestu Yelmida Azis Yusnimar Sahan Zuchra Helwani

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