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All Journal CHEMISTRY PROGRESS CHEMICA Jurnal Teknik Kimia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Riset Kimia Info-Teknik Jurnal Ilmiah Universitas Batanghari Jambi Communications in Science and Technology Jurnal Vokasi Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Journal of Community Engagement Research for Sustainability Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Sagu Molekul: Jurnal Ilmiah Kimia
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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Konversi Biji Alpukat Menjadi Bio-oil Dengan Metode Pyrolisis Menggunakan Katalis Zeolit Alam Agustin, Dian; Sahan, Yusnimar; Bahri, Syaiful
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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Abstract

The trend of fossil fuel demand is always increase by time in the world. Yet, petroleum oil as a non-renewable has been declining each year. It is necessary to find a new alternative fuel that can be renewed, such as to applied biomasses as resources energy. One of several potential biomasses can be converted to energy or bio-oil is the seed of an avocado because it’s contain so high fat fatty acid (FFA). This seed has not been used maximacally yet, so in this research this seed is converted into bio-oil by using pyrolysis method and natural zeolite as a catalyst. The purpose of this research is to get the highest yield of bio-oil by applied variation of ratio sample : catalyst (50:0, 50:1, 50:2, 50:3 g/g), and temperature variation of pyrolysis process is 270, 300, 330 ºC. Based on results in this research, the highest of bio-oil is 79,08 % found under condition ratio sampel : catalyst 50 :2 and pyrolysis temperature is 330 ºC. The bio-oil is analyzed and it’s density 0.988 g/ml, viscosity 7,560 cSt, acid value 0,1002 mg NaOH/ g sample,  flash point 56 ºC and heating value 17,354 MJ/kg. Based on GC-MS analyzed bio-oil were contained (2,4,4-trimethyl-2-pentene), (3,4,4-trimethyl-2- pentene), (Diisobutylene), (2,4,4-trimethyl-3-pentene) and (2-methyl-trimer- propene) with peak area (7,84%), (7,82%), (5,69%), (3,82%) and (3,58%).  Keyword :  Avocado seed, Bio-oil, Natural Zeolite, Pyrolysis
Konversi Kayu Ketapang (Terminalia Catappa. L) Menjadi Bio-Oil Menggunakan Metode Pirolisis Dengan Katalis Co-Mo/NZA Rizky, Muhammad; Bahri, Syaiful; Yusnimar, Yusnimar
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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Abstract

The demand of fossil fuel  is increasing each year. On the other hand,  the availability of conventional petroleum fuels diminishing due to its non-renewable. Therefore, it is necessary to develop  a  new alternative  fuel  that can be renewed,  one of the solution  is the  processing of biomass into bio-oil. Bio-oil is a result of the pyrolysis of biomass. Availability of Ketapang rod is converted  into bio-oil by pyrolysis method using catalysts natural zeolite. The purpose of this study was  to  determine the performance of  the catalyst  to  produce bio-oil,  characterize  the density, viscosity, acid number, and flash point of bio-oil  that produced, as well as analyze  the chemical components  of bio-oil  by GC-MS method.  Pyrolysis of  Ketapang rod  catalyst  from natural zeolite  in the reactor  slurry  do  by feeding 50 grams with the size    -100 +200 mesh, silinap 500 ml, stirring speed is set to 300 rpm, 320oC temperature, and the process runs for 120 minutes. The results showed that the optimum yield obtained  on 2.5% catalyst, amounting to 77%. The test results obtained by the physical properties of density 0.875 g/ml, 9.56  cSt viscosity, acid number of 49,89 gr NaOH/gr sample. Keywords: Bio-oil, pyrolysis, Ketapang rod, natural zeolite, alternative fuels
Transesterifikasi Biodiesel Dari CPO FFA Tinggi Dengan Katalis ZnO Komersial (Pengaruh Variasi Jumlah Katalis Dan Rasio Mol Minyak : Metanol) Mahdi, Khafid Ali; Yusnimar, Yusnimar; Helianty, Sri
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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Abstract

Crude palm oil (CPO) has a high free fatty acid concentration can be used as a raw material in the production of crude biodiesel. Recently, ZnO compounds are used as heterogeneous catalysts in the biodiesel production. This research was conducted to produce crude biodiesel from CPO with the effect of variations in the mole ratio of reactants and amount of ZnO catalyst. The process of producing crude biodiesel conducted with two stages, esterification and transesterification reactions. Esterification reaction conditions at a temperature of 65°C, mole ratio of oil : methanol (1: 6, 1:12, and 1:18), and amount of catalyst 1%. Transesterification reaction conditions at a temperature of 65°C were used variation of a mole ratio of oil : methanol (1: 6, 1:12, and 1:18), and amount of catalyst (0.3%, 0.4%, and 0.5%). The highest yield of crude biodiesel obtained 96.18% under the conditions of a temperature of 65 °C, the mole ratio of reactants 1:18 and amount of ZnO catalyst 0.5%. Based on results, the crude biodiesel has a density (40°C) 868 kg/m3, kinematic viscosity (40°C) 5.71 mm2/s, a flash point of 164°C, the acid number of 0.72 mg-KOH/g-biodiesel, saponification numbers 20.83 mg-KOH/g-biodiesel and alkyl ester content of 96.56%. These characteristics of biodiesel are suitable to SNI 04 - 7182- 2006 standard.Key words : crude biodiesel, crude palm oil, esterification, transesterification, ZnO
Pembuatan Crude Biodiesel Dari Cpo BER FFA Tinggi Dengan Menggunakan Katalis ZnO Sintesis Martin, Intan Fitra; Helianty, Sri; Yusnimar, Yusnimar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel is an alternative fuel that becoming worldwide attention as renewable energy which could replace diesel fuel in compression ignition engines. It can be produced from CPO which has a high free fatty acid through the process called transesterification was catalyzed by zinc oxide (ZnO) catalyst. Heterogeneous catalyst such ZnO was promising candidate which has various advantages such as the easy catalyst separation from the reaction mixture, product purification and the reduction of environment pollutants. The purpose of this research is to synthesis ZnO catalyst by natrium oxalate precipitation. The crude palm oil has free fatty acid as such as 8,36%, so CPO conversion was conducted by esterification then transesterification reactions. The esterification reaction was occured at temperatures 65oC with H2SO4 catalyst as much as 1% w/w of oil. The transesterification reaction was occured at temperatures 65oC; with the molar ratio of crude palm oil to methanol were 1:6, 1:12, 1:18; concentration of ZnO catalysts were 0,3%, 0,4% and 0,5%; reaction time was 60 minutes. ZnO catalyst exhibited good activity in the biodiesel production with the yield of FAME above 98% after 1 hour of reaction with the molar ratio of methanol oil 1:18 and ZnO catalyst concentration of 0.5% w/w of oil. The produced crude biodiesel has density 878,5 kg/m3, viscosity 5,7 mm2/s, flash point 165oC, acid value 0,75 mg-KOH/g-biodiesel and alkyl ester content 97,2%.Keywords : crude biodiesel, crude palm oil, esterification, transesterification, ZnO.
Penentuan Daya Jerap Karbon Aktif Dari Meranti Merah Terhadap Ion Fe(III) Yusra, Arif; Yusnimar, Yusnimar; Drastinawati, Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Waste pollution of heavy metals in the waters continue to rise each year. this may endanger the survival of living creatures that are in the vicinity. One of contributor of the heavy metalwaste in the waters is the result of discharges of industrial waste. Activated carbon which has a high adsorption capacity for the adsorbate. Activated carbon can be produced from materials containing carbon or charcoal was treated in a certain way to gain more surface area. The purpose of this research was to determine the ability of activated carbon adsorption of the ion Fe (III) which in the synthesis of red meranti. This research used two methods of activation that chemical activation with activator concentration variation Na2CO3 4%, 5% and 6% w/v, and physical activation with temperature variation of 300 0C, 500 0C and 700 0C. The characterization of activated carbon which include: moisture content, ash content and adsorption capacity for iodine based Standard SNI 06-3730-95, and determining the ability of activated carbon jerap against ion Fe (III) at concentrations of 20 ppm. Theresults obtained by the characteristics of the activated carbon 06-3730-95 meet SNI standards. Adsorption capacity of active carbon on ion Fe(III) has maximal value at 99.745% physic way with temperature at 300 0CKeywords : Activation , Ion Fe (III), Activated Carbon
Penentuan Model Kesetimbangan Adsorpsi Ion Pb(II) Menggunakan Regenerated Spent Bleaching Earth (RSBE) Sasmitra, Dani; Yusnimar, Yusnimar; Fadli, Ahmad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Spent bleaching earth (SBE) is a waste produced by the bleaching unit in the palm oil refinery industry. One of the efforts to tackle SBE waste is regenerated into regenerated spent bleaching earth (RSBE) which can be used as an adsorber of heavy metals in water waste such as Pb(II) from industry. This study aims to determine the characteristics of the SBE and RSBE, the adsorption equilibrium time, the adsorption capacity of the RSBE with variations in the concentration of Pb(II) ion and the adsorption temperature and determine the appropriate adsorption isotherm model. In this study, SBE was regenerated by extracting oil by soxletation at 72oC for 5 hours with n-hexane solvent, followed by washing with 3% HCl and then physically activated at 470oC for 12 hours. A total of 1 gram of RSBE was mixed with Pb(II) solution with a volume of 100 ml at various concentrations (20, 30 and 40 ppm) and adsorption temperatures (40, 50 and 60°C). The results showed that the absorption of Pb(II) ion by RSBE reaches equilibrium after 150 minutes contact time and the adsorption that occurs follows the Langmuir isotherm adsorption model with a correlation coefficient (R2) value of 0,9935 and a maximum absorbing capacity value of 4,29 mg Pb(II)/g RSBE that occurs at variations in the concentration of 40 ppm and a temperature of 60°C. Keywords: adsorption, adsorption isotherm, Pb(II) ion, RSBE, SBE.
Isolasi Kitin Dari Limbah Cangkang Kepiting Bakau (Scylla Olivacea) Dengan Variasi Konsentrasi Natrium Hidroksida Dan Suhu Pada Proses Pembuatan Serbuk Kitin Darmiyati, Siti; Drastinawati, Drastinawati; Yusnimar, Yusnimar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Chitin is poly (2-acetamido-2-deoxy-β(1,4)-D-glucopyranose). Chitin can be isolated through several stages of chitin powder production, demineralization stage and bleaching stage. The purpose of this study is to learn the effect of concentration of sodium hydroxide and temperature in the process of chitin powder production, analyze chitin by using FTIR (Fourier Transform Infrared) spectrophotometer and determining moisture content, ash content and yield. The research procedure begins with crab shell waste size reduction into a powder size. The process of chitin powder production was carried out using concentration of NaOH variations (2.5%, 3.5% and 4.5%) and temperature (550C, 650C dan 750C), the ratio of 1:10 (w/v) for 2 hours and stirring speed 150 rpm, then demineralization process using HCl 1.5 N, the ratio of 1:15 (w/v) for 1 hour and stirring speed 150 rpm, then bleaching process using 4% NaOCl, the ratio of 1:15 (w/v) for 1 hour. The results showed that the higher concentration of NaOH and temperature, the yield, the water content and the resulting ash content were lower at 4.5% NaOH concentration and 750C at 15.54%, 4.13% and 0.5%. Based on the results of the obtained FTIR showed that the residue from isolation was chitin.Keywords: bleaching, crab shells, demineralization, FTIR, chitin.
KINETIC MODELING STUDY FOR ACYLATION REACTION OF O-XYLENE TO 3,4-DIMETHYLBENZOPHENONE OVER H-BETA Yusnimar -
Jurnal Riset Kimia Vol. 1 No. 1 (2007): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v1i1.100

Abstract

 ABSTRACTThe reaction of o-xylene with benzoic anhydride has been studied by the changing molar ratio of the reactants (20:1, 10:1, and 5:1) in a batch reactor under reaction temperature 120oC. The reaction carried out without catalyst and also with catalyst Zeolite beta which was activated at 300oC overnight. HPLC analysis results showed that the yield of the product increase with the changing molar ratio of the reactants. An attempt was made in determining the kinetics of the reaction. The results show that the reaction is neither first nor second order in the acylating agent. Obtaining the reaction order even initially is unsuitable for even simple reactions that do not go to completion. It is even less applicable where more than a single process which affects the rate is taking place right from the start. These might be any one or combination of diffusion, adsorption, desorption, inhibition of the reaction by the product and multi step reactions on the surface. Postulated reaction mechanisms may be required in combination with experimental data to determine even initial reaction orders. Key words: o-xylene, catalyst, kinetics, reaction order.
Mn/carbon sphere catalyst for heterogeneous activation of peroxymonosulfate for methylen blue removal Yusnimar Yusnimar; Khairat Khairat; Chairul Chairul; Silvia Reni Yenti; Wisrayetti Wisrayetti; Barata Aditya Prawiranegara; Heni Sugesti; Panca Setia Utama; Edy Saputra
CHEMICA: Jurnal Teknik Kimia Vol 8, No 2 (2021): December 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v8i2.22063

Abstract

One of the latest innovations in textile waste treatment is advanced oxidation processes (AOPs) methods using an oxidizing agent capable of producing sulfate radicals (SO4•). This study aims to determine the activity of the Mn/Carbon sphere catalyst in the oxidation process, reduce the dye content by using a combination of peroxymonosulfate (PMS) and Mn/Carbon sphere catalyst as an oxidizing agent, and determine the optimum conditions in the process of reducing dye levels in the water. A hydrothermal process carried out the catalyst synthesis process to produce black carbon from D-glucose solution, then impregnated with variations of 3% and 5% of Mn metal. The degradation of methylene blue (artificial waste) of 25mg/L (1:10 dilution) was carried out for 120 minutes with variations in the catalyst mass of 0.001, 0.002, 0.003, and 0.004g and the mass of PMS 0.01, 0.02, 0.03, and 0, 04g in 100ml sample. Mn/Carbon sphere catalyst was able to activate PMS and was able to degrade methylene blue by 88.16%. The optimum condition for reducing the methylene blue levels in the water is at a concentration of 1g/L PMS and a Mn/Carbon sphere catalyst (5% Mn metal) 0.5g/L with an efficiency of 88.16%.
UTILIZATION SPENT BLEACHING EARTH AS A FILLER OF MATERIAL CONSTRUCTION Yusnimar Yusnimar; J. N. Rahman; P. Ningendah
INFO-TEKNIK Vol 22, No 1 (2021): INFOTEKNIK VOL. 22 NO. 1 JULI 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v22i1.11209

Abstract

Spent bleaching earth (SBE) is a waste from cooking oil industry. It is categorized as one of the hazardous and toxic materials, because oil residues in it. Generally, SBE is overcome by landfill and it’s sometimes become problems. Basically SBE contains SiO2 and the size of the grain is very fine, almost the same as the fine aggregate of sand used for making brick. In this study, the making of brick used SBE with several variations (2.75% - 27.52%) of the total raw materials used. Brick making methods are based on SNI 03-0348-1989 for raw material ratio, SNI 03-0348-1989 for molding and presshing, SNI 03-6825-2002 for drying and curing. The brick quality was determined based on fineness modulus parameters, dry weight, brick absorption to water and compressive strength. Brick contain SBE 2.75% was produced with molding size of 15cm x 30cm x 9cm, it has an average dry weight of 7.80 kg, compressive strength of 8.95 MPa and absorbing power of 1.26%.
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