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Yusnimar Sahan
Universitas Riau
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences Other

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Pembuatan Biodiesel Dari Minyak Kelapa Dengan Katalis H-Zeolit Melalui Proses Metanolisis Feni Nopriza; Syaiful Bahri; Yusnimar Yusnimar
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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Biodiesel is an alternative fuel from renewable raw materials. One of the raw material can be used to make biodiesel is coconut oil. This research aims is determine the maximum biodiesel yield by using varying amounts of H-zeolite catalyst and methanol mole ratios of coconut oil through a process methanolysis. The independent variables used in this study is the mole ratio of methanol-oil 3: 1; 6: 1; 8: 1 9: 1 and catalyst concentration of 1%, 2%, 3% respectively. Temperature of 60°C, 1.5 hours and stirrer speed is keep constant. The yield of biodiesel produced in this study reached 84.78% at a concentration of 2% catalyst mole ratio of methanol-oil 6: 1. The density of biodieselproduced at the maximum yield was 880.90 kg / m3, kinematic viscosity of 4.59 mm2 / s, the flashpoint of 110oC, the water content of 0.048% v, and the acid number of 0.65 mg KOH / g, respectively in addition, analysis of the chemical compositions of biodiesel is used GC - MS. All the characteristics of the physical properties of biodiesel produced have met the standard range contained in the SNI 04-7182-2006.Keywords: biodiesel, homogeneous catalysts, methanolyisis, coconut oil.
Konversi Pelepah Nipah Menjadi Bio - Oil Dengan Variasi Katalis NiMo/Lempung Cengar Memalui Proses Pirolisis Surya Romadani; Syaiful Bahri; Yusnimar Yusnimar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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Abstract

Bio-oil is one of the alternative energy that can be used as a substitute for petroleum. Riau has huge potential in Nipah and clay which not be used widely. Bio-oil can be produced through pyrolysis process  of Nipah  with catalyst  NiMo/ Cengar Clay. Theaimings of this study is to determine the effect of variations in catalyst NiMo/ Cengar Clay and characterize the physical and chemical properties of the yield of bio-oil produced. In this study the pyrolysis  process carried out at 320 °C of temperature,300 rpm  stirrer speed, 500 ml  of silinap and50 grams of biomass  in +100-200 mesh size.Variation of the catalysts are0, 0.5, 1.5 and 2.5 % w/w. The results of this study indicated that the optimum yield was obtained in 0.5 % catalyst NiMo/ Cengar Clay, which is 63.64 %. The analysist  results of the physical properties of bio-oil are density of 0.884 g/ ml, 9.486 cSt of viscosity, 47.92 gr NaOH/100 gr sample of acid number, 45.47 MJ/Kg of the calor value, and 54°C of flash point. The results of chemical analysis by GC - MS , obtained some chemical components such as Acetic acid, Butyric Acid, 2,2-Dimethoxy-Ethanol, Furfural , 4-Hydroxy-Butyric Acid, Phenol, O-Cresol , 2-Methoxy-6-methyl-phenol and catechol. The  characteristic  results  have been  obtained  is approaching the characteristics of fuel oil and bio-oil standard. Keywords : Bio-oil, pyrolysis, Nipah and NiMo Catalyst/ Cengar Clay
Katalisis CPO Menjadi Biodiesel Dengan Katalis ZnO Sintesis Presipitan NaOH Mukhlisoh Arifah; Sri Helianty; Yusnimar Yusnimar
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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Biodiesel is an alternative renewable and biodegradable fuel with properties similar to petroleum diesel. It result of the conversion of vegetable oils derived from both non-foodand food ingredients which have economic value compared to fossil fuels. Heterogeneous catalysts such as ZnO in the manufacture of biodiesel can solve the problems of the use ofa homogeneous catalyst that can reduce the burden of separation, cheap, stable, and can be used repeatedly. This research aims to synthesize ZnO catalyst by precipitation method using NaOH. Then, the effect of variations in mole ratio of reactants and variations in the amount of catalyst on the yield of biodiesel produced will be studied. FFA content in thefeedstrock is 8,36%. Therefore, Biodiesel production process is carried out with a twostage reaction that is esterification and transesterification. The esterification reaction washeld at temperatures 65oC with H2SO4 catalyst as much as 1% w/w of oil. The transesterification reaction was held at temperatures 65oC; with H2SO4 catalyst as muchas 1% w/w of oil. The mole rato of oil : methanol are 1:6, 1:12, 1:18; ZnO catalyst amount are 0,3%, 0,4% and 0,5%; reacton time is 60 minnutes. The higest yield obtainedis 93,6% in process with 1:18 in oil : methanol mole ratio and 0,5% catalyst amount. The produced biodiesel has density 888 kg/m3, viscosity 5,63 mm2/s, flash point 175oC, acidvalue 0,53 mg-KOH/g-biodiesel and alkyl ester content 99,1%.Keywords : Biodiesel, CPO, esterification, transesterification, ZnO.
Sintesis Kitosan Dari Limbah Cangkang Kepiting Dengan Variasi Konsentrasi Naoh Dan Kecepatan Pengadukan Aisyah Rani; Drastinawati Drastinawati; Yusnimar Yusnimar
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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One parameter that determines the quality of chitosan is the value of deacetylation degree. The degree of deacetylation is influenced by the concentration of NaOH and the stirring speed used in the deacetylation process. The combination of NaOH concentration and the right stirring speed will produce chitosan with a high degree of deacetylation and good quality. The purpose of this study was to determine the effect of using NaOH concentration and the speed of stirring on the characteristics of chitosan produced from crab shells. Crab shells was deproteinated with 3.5% NaOH at 65ºC for 2 hours, the result of deproteination process is crude chitin. Crude chitin was demineralized with 1 N HCl at 30ºC for 1 hour, the result of the demineralization process is chitin. Chitin was deacetylated with NaOH concentration of 40%, 60% and 80%, the deacetylation process took place at a temperature of 120ºC for 3 hours with a stirring speed of 100 rpm, 150 rpm and 200 rpm, the deacetylation process was carried out with two replications. Chitosan obtained was tested by Fourier Transform Infra-Red Spectrophotometer (FTIR). The obtained deacetylation degree of chitosan produced ranged from 70.88% - 85.39%. The chitosan yield produced ranged from 64.5% - 72.3%. The levels of chitosan ash produced ranged from 1.45% - 2%, while the water content of chitosan produced ranged from 1.45% - 2%.Keywords : crab shell, deacetylation. chitosan, FTIR, deacetylation degree
Pembuatan Biodiesel dari Limbah Ikan Baung Dengan Katalis Padat Lempung Sukiman Hernanda; Syaiful Bahri; Yusnimar Yusnimar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Biodiesel as an alternative diesel fuel are made from renewable biological resources, such as vegetable oils and animal fats. In Indonesia, fish production increase every year, so the waste of fish disposal usually is rising as well. Therefore, it is necessary to take advantage of new innovations of fish waste to biodiesel. In this research, conversion of the fish baung disposal to biodiesel has been done. By using a clay catalyst “lempung cengar”. Firstly, the fish disposal was heated for 4 hours. Then, oil was extracted from the fish disposal by pressed manually. Afterward, oil was converse to biodiesel by using a transesterification reaction with methanol as a reactan and a lempung cengar catalyst. The transesterification reaction was conducted under condition temperature 600C, stirring ± 150 rpm and a reaction time 210 minutes. In order to get a biodiesel yield maximally, variations of ratios sample and methanol (1:3; 1:6; 1:9), variation of a clay catalyst (0.5%, 1%, 1.5% w/w) were applied in this research. The result showed than biodiesel yield maximum around 78.01%, under condition ratio between oil and methanol 1:9 and catalyst 1% of amount oil total. Based on physical properties analysist of biodiesel it has density 882 kg/m3, viscosity 5.18 cSt, acid number 0.63 mg-KOH/gr sample, and heating value 1450C respectively. In addition, oil was determined it is chemical properties by GC-MS method before it was applied in the transesterification reaction. Oil has oleat acid 49.10%, behenat acid 29.34%, stearat acid 4.69%, 9 heksadekanoat acid 2.64%, and palmitat acid 0.22%.         Key word: Fish oil, Baung fish, Biodiesel, Clay catalyst, Transesterification reaction
Pemanfaatan Abu Tandan Kosong Sawit Sebagai Larutan Elektrolit Pada Aplikasi Sel Elektrokimia Wahyu Rahmadhan; Yusnimar Sahan; M. Iwan Fermi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Oil palm empty fruit bunches ash is the material which has K+ about 25.68%. K+ has a high value of potential is -2.94 volt (V). That is making K+ be the ion which high possibility for reduction others ion. This research having goals to known DC electricity value (such as voltaic value, current, power , and capacity) within using oil palm empty fruit bunches ash as the electrolyte solution. Part of scrap electronic device that is printed computer board/PCB and Galvanic zinc metal used as electrodes (Kation and Anion). Oil palm empty fruit bunches ash solute made by (b/b) mass ratio, ash: water is 1: 4. And then, the rate of kalium analyzed by flame photometry. As a result, kalium has 60.375 g/L in oil palm empty fruit bunches solutions. After that making an application of electrochemical cell with variates 8, 10 and 12 electrodes cell to calculate voltaic and current values. Beside that other variety is compare ash solution with NaCl solution about DC electricity value with equal of electrode cells (12 cells) and ratio. Results are electrochemical cell having voltaic value, current, power with 12 cells of electrodes is 4.76 V, 0.65 miliampere (mA) and 3.094 miliwatt (mW). The conclusion that oil palm empty fruit bunches ash solution having more high electricity value than NaCl solutions.Keywords: ash, current, NaCl, PCB, volt
Pemanfaatan Printed Circuit Board (Pcb) Motherboard Bekas Untuk Pembangkit Listrik Portabel Pebriansyah Putra; Yusnimar Sahan; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Galvani cells which are cells based on chemical reactions that can produce electric current. In this research, the generator cell was built to produce electricity. Galvani cells is consisting of zinc and used as a anodes, the motherboard printed circuit board (PCB) is used as a cathode, and a solution of NaCl as an electrolyte. The aim of this research is to estimate the performance of the galvani cell using the types of electrolyte solutions NaCl and NaOH with variation concentrations (9%, 12%, and 15%) and electrode surface area (5 cm x 10 cm, 6 cm x 10 cm, 7 cm x 10 cm). Cell performance is measured by multitester equipment and LED lights (8 volt). The results shown that the generator cell can produce electric power of 6.82 volts optimally by using 15% NaOH and 7 cm x 10 cm electrode surface area applied for this research.Keywords: electrode, electrical voltage, PCB motherboard, zinc.
Penentuan Kesetimbangan Adsorpsi Regenerated Spent Bleaching Earth (RSBE) Terhadap Ion Fe(III) Mhd Taufik Kurniawan; Yusnimar Yusnimar; Sri Helianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Spent Bleaching Earth (SBE) is a waste of palm oil refinery industry. One of the efforts to control the SBE is to be processed into Regenerated Spent Bleaching Earth (RSBE). This study aims to determine the adsorption capability of RSBE and the corresponding adsorption model on ion Fe(III). SBE processing into RSBE by extraction of oil on SBE soxhletation manner using n-hexane at a temperature of 72°C for 8 hours. Then the rest of the SBE results soxhletation washed with 3% HCl and physically activated at a temperature of 470oC. A total of 1 g RSBE mixed with a solution of Fe(NO3)3 with a volume of 100 ml at various concentrations (10, 15, 20, 25 and 30 ppm). The results showed that the adsorption RSBE reach equilibrium after a contact time of 150 minutes and adsorption that occurs following the Langmuir isotherm models with correlation coefficient (R2) = 0.982 and the maximum value jerap capacity = 2.71 mg Fe (III) / g RSBE.Keywords: adsorption, adsorption isotherms, ion Fe (III), RSBE, SBE
Pemisahan Emas Pada Motherboard Komputer Dengan Metode Elektrolisis Ricson Rinaldi; Yusnimar Yusnimar; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Gold metal has been using in electronics and telecommunication industry, for example, Motherboard computer. The separation of gold from the Motherboard computer has been done in this study. To get the maximum results in the separation of the are gold used variations potential difference ( 6; 9; 12 volt ) and the type of precipitant (NaHSO3 and H2C2O4) . In this study, a certain number of samples is used samples Motherboard computer electrolyzed H2SO4 for 1 hour. The precipitate formed is separated from the filtrate. The precipitate was dissolved in Aqua Regia at a temperature of 70˚C for 30 minutes further diluted with Aqua DM until the volume is 50 mL . Au concentration was analyzed by AAS (Atomic Absorption Spectrophotometry) and Au deposited with NaHSO3 and H2C2O4 . Based on the analysis result, the maximum Au concentration at the former Motherboard computer is equal to 2.285 ppm. For 5 grams of the sample , the maximum weight of Au precipitate obtained 0.97 grams by using H2C2O4 as a precipitant .Keywords : Au, motherboard computer, electrolisis, precipitant
Konversi Tongkol Jagung Menjadi Bio - Oil Dengan Bantuan Katalis Zeolit Alam Secara Pyrolysis Siti Rahmah; Yusnimar Sahan; Syaiful Bahri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Bio-oil is obtained from corn cobs  (Zea mays  L.)    biomass by using pyrolisis process with a natural zeolite catalyst ratio between the sample and catalyst. This research was conducted by using a pyrolysis reactor, 500 ml of thermo-oil (silinap) are fed into the reactor pyrolisis . Then the pyrolisis process is started by flowing the nitrogen gas 1.35 mL / sec into the reactor and  pyrolisis process is aloowing run 3 hours. In order to get the maximum yield of bio-oil, there were determined the affect of ratio variation between biomass and catalyst (50:1, 50:2 and 50:3 g), and variation of pyrolysis temperaturec(270, 300 and 330oC). as a comperison the pyrolysis process without a catalysthas done. The result of this research, the higher yield of bio-oil is 84,9% which obtained under condition ratio a sample and a catalyst 50:2 g, and a pyrolysis temperature 330oC. Based on the result of characterized of bio-oil, density is 0.899 g / ml , 7.133 cSt viscosity , acid number 0.097 g NaOH / g sample , and the flash point 54 º C. Based on the results of GC-MS analysis showed that the dominant component in the bio-oil by using 2 grams of natural zeolite and 330oC are Cyclohexane,1-ethyl-1-methyl 15.96 %; pentan ,2,2,4, 4 tetramethyl 5.78%; 1-pentene, 2,4,4  –  trimethyl 5.78%; 2,3,4,4-trimethyl-pentene 4.99% and 2-pentene,2,4,4-trimethyl 2.44 %. Key Word : Bio-oil, Corn Cobs, Natural Zeolite, Pyrolisis.
Co-Authors , Deviona, , Ahmad Fadli Aisyah Rani Alfarisi, Cory Dian Alhabsy Affif Aman, Azka Amun Amri Andi Muhammad s, Andi Muhammad Annisa Ulhasanah Apriliani, Prapita Aqilla Cahyani Ardiansyah, M. Frendy Armaini, Armaini Arofi, Habib Barata Aditya Prawiranegara Bhaskoro A. Muthohar Chairul Chairul Chairul Chairul, Chairul Darliansyah, Danny Darmiyati, Siti Deby Octavia Deni Afrika Desadria, Renny Desi Heltina Dian Agustin Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati E, Sutanto E, Yenie Edi Sutanto Edo Prima Arif Edwidya Ocktaviani Armay Eliza, Mutia Emelda, Retta Esti Rahmat Tini Evelyn EVELYN EVELYN Evelyn Evelyn Fadli, Deno Febri Feni Nopriza Fermi, Iwan Fitri Zulva Hasanah Hamsyah Adhari Hasby Herdinasrul Hasibuan, Muhammad Ilham Febrian Mahodum Heliyanti, Sri Heni Sugesti Idral Amri Indrawati . Indriana, Hanifah Intan Fitra Martin, Intan Fitra Irwanda, Juni Isnaini Isnaini J. N. Rahman Juliani Dafis Kamarullah, Rahmat Khafid Ali Mahdi, Khafid Ali Khairat Khairat, Khairat Khamaluddin Aditya Kiki Despramita Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari M. Iwan Fermi Maria Peratenta Sembiring Mashuri Mashuri Mhd Taufik Kurniawan Misrulina Misrulina Muhammad Amri Muhammad Ismet Muhammad Nur Rahim Sjam muhammad rizky, muhammad Mukhlisoh Arifah Mulyadi . Nurul Azizah Nurwijayanti Ohi, Hiroshi P. Ningendah Pebriansyah Putra Putri, Alivia Hardana Quentena, Novi Rahmadahana, Suci Rahmi Adisti Rahmi, Sri Wahdini Ramadona, Aulia Ratna Dian Armalita Restika Rahayu Reza Andreano D Ricson Rinaldi Riski Adi Mulia Rispiandi, Fadli Rizaldi Saputra Rozzana Sri Irianty Run Bunga Dewi Rusma Yanti S, Muhammad Rizki Sasmitra, Dani Sayyidhani, Muhammad Hisna Sherly Fitri Rahmadhani Silvia Reni Yenti siti rahmah Sri Helianty Sri Herlianty Sukiman Hernanda Surya Romadani SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Tasman, Annaya Qamara Taufik Kharnofa Utama, Panca Setia Wahyu Rahmadhan Wisrayetti Wisrayetti Wulandari, Siti Rahmi Indri Yelmida Azis Yulfiana Sultana Yulva Gemy Yusra, Arif Zultiniar Zultiniar