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All Journal Reaktor Jurnal Sains dan Teknologi Mechatronics, Electrical Power, and Vehicular Technology Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Konversi Journal Of Chemical Process Engineering (JCPE) Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Teknomekanik Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability SAINSTEK Estungkara: Jurnal Pengabdian Pendidikan Sejarah International Journal of Renewable Energy Development Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Engineering and Technological Sciences Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Amun Amri
Department Of Chemical Engineering, Faculty Of Engineering, Riau University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences Other

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Sintesis Film Tipis Tembaga Oksida Dengan Metode Sol-gel Dip-Coating Sebagai Solar Selective Absorber Andrizal, Andrizal; Herman, Syamsu; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Solar selective absorber (SSA) is a thin film at the surface of the collector that absorbs solar radiation selectively and convert it into maximum heat energy. Solar selective absorber can be synthesized using sol-gel dip-coating method. The purpose of this research is to know the effect variation number of dipping-drying cycles to absorptance copper oxyde coating. Piecesof aluminum with size 2cm x 4cm were cleaned using a solution of phosphoric acid 10% at temperature 50oC for 10 minutes. Sol precursor prepared by disolved copper nitrate trihidrate and propionic acid in ethanol. The sol prekursor was stirred for 2 hours at room temperature. The coating was synthesized with 0.3M and the number of dipping-drying cycles 4x, 6x and 8x, then annealed at temperature 550 oC for 1 hour. The results showed that thehighest absorptance value found in coatings which was synthesized using copper oxyde 0.3M at 8x cycles with absorptance (α) = 71.99%, emitance (ε) = 6.63%, XRD test showed of cupric oxide (CuO).Keywords : coating, solar selective absorber, sol-gel dip-coating.
Kinetika Reaksi Pada Sintesis Hidroksiapatit Dengan Metode Presipitasi Saputra, Fakhri; Fadli, Ahmad; Amri, Amun
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 is a ceramic material that used in biomedic especially for bone and tooth implant. Hydroxyapatite can be synthesized by precipitation method. The aims of this research is determining reaction kinetic of hydroxyapatite synthesis by precipitation method with variables of temperature and stirring rate. The research was started by dissolving 8,27 grams of CaO in 200 mL of aquadest. Subsequently the dissolution was titrated with phosphoric acid 1,8 M while heated with temperature variation of 40°C, 50°C and 60°C, also stirring rate of 100 rpm, 200 rpm and 300 rpm. Samples were taken in every 20 minutes by 20 mL and aging for 24 hours in freezer. Then sample was filtered by using filter paper, and the filtrate was analyzed by complexometric titration technique. The result shows that the reaction kinetic follows pseudo second order equation and constants of reaction rate increases with increasing temperature following equation of k = 66, 88e- (25819,13 / RT), k = 10,64e- (18812,92 / RT) and k = 167,80e- (24824,77 / RT) for stirring rate of 100 rpm, 200 rpm, and 300 rpm. Constants of reaction rate at 100 rpm is 0,0056 min-1 and increases to 0,0222 min-1 when the stirring speed increased to 300 rpm at 60°C.Key words : ceramic, hydroxyapatite, reaction kinetic, precipitation
Pengaruh Fraksi Etanol Dalam Pelarut Dan Ketebalan Coating TiO2 Terhadap Kinerja Prototip Dye-Sensitized Solar Cell (DSSC) berbasis Dye Dari Buah Tumbuhan Senduduk (Melastoma malabathricum) Haq, Arinil; Amri, Amun; Fadli, Ahmad
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 globally encountered energy crisis can be solved by utilizing sunlight as an alternative energy source. Sun energy can be harnessed through application on solar cell. Dye-sensitized solar cell (DSSC) is a type of solar cell which utilizes dye as light-harvester and also assensitizer. This research aims to investigate the usage of malabar melastome (Melastoma malabathricum) as dye material and to observe the impact of ethanol solvent’s dilution and coating thickness of TiO2 on the DSSC’s performance. To fabricate the DSSC, material preparation and dye extraction was done by dissolving fruit of malabar melastome in amixture of 40 ml ethanol, 8 ml acetic acid, and 52 ml aquadest. The making of TiO2 paste was done by mixing 5 g of TiO2 with 40 ml solvent and deposited using spin coating method. Themaking of electrolyte was done by dissolving 0,127 g of iodine in 0,5 M of KI solvent. The counter-electrode was made and the DSSC was assembled. The DSSC’s voltage was thenexamined using multitester and analyzed using SEM, UV-Vis spectrophotometry, and adhesion test. The higher ethanol fraction in the solvent and the thicker the coating of TiO2,the better voltage resulted. This fact is supported by the morphology and adhesivity test. It can be proved from the highest voltage that is obtained from the sample with 100% ethanol fraction and the thickness of 240 μm which is 659 mV/cm2 under the illumination of LEDlight and 1806,7 mV/cm2 when applied on direct sunlight.Keywords: DSSC, photovoltaic, malabar melastome, spin coating, TiO2
Pembuatan Prototip Dye Sensitized Solar Cell (DSSC) Menggunakan Dye Ekstrak Buah Senduduk (Melastoma Malabathricum L) Dengan Variasi Fraksi Pelarut Dan Lama Perendaman Coating TiO2 Fitria, Anisa; Amri, Amun; Fadli, Ahmad
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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Dye-Sensitized Solar Cell (DSSC) is a solar cell unit that work based on electrochemical principle which convert the sun radiation into electricity. DSSC uses TiO2 semiconductor material for coating with spin coating method. The purpose of this research is to make a DSSC prototype using of Malabar melastome fruit (Melastoma Malabathricum L.) as dye and also to observe the impact of water’s volume and soaking duration of TiO2 coating on the produced voltage. The DSSC is constructed with a layering system (sandwich) which consists of working electrode and counter electrode. The working electrode is made by using FTO glass (2.5 x 2.5 cm2) which is coated with TiO2 paste that made by mixing 0.5 gram TiO2 powder in 4 ml ethan ol (1:8). The electrode is sintered under temperature in 350oC for 15 minutes and then soaked in dye liquid with volume of solvent fraction in dye dilution which are ; without dilution (100%); diluted once (50%); and diluted twice (25%) for about 10 minutes, 2 hours and 24 hours. This electrode is then given two droplets of 0.05 M electrolyte. After that the counter electrode is made by using FTO glass coated with carbon from candle’s fire. The fabrication of DSSC is done by sticking both of the FTO glasses up. Melastome Malabar extract as dye is shown to contain anthocyanin, proven with a maximum wavelength of 515 nm. DSSC prototype generated by variation of 24 hours dye soaking duration and without dilution (100%) gave the highest voltage with the solar energy-to-electricity conversion of 1.026 volt/cm2 and when illuminated with LED lamp gave 0.595 volt/cm2. The morphology of TiO2 layer show a porous surface that is conducive to the absorption of dye. The level of adhesion obtained from the best samples showed good adhesion qualities (3B)Keywords: DSSC, LED, melastome malabar l, sunlight, voltage
Sintesa Precipitated Calcium Carbonate (PCC) Dari Cangkang Kerang Darah ( Anadara Granosa) Dengan Variasi Jenis Asam Dan Waktu Karbonasi Zikri, Ahmed; Amri, Amun; Zultiniar, Zultiniar; Yelmida, Yelmida
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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Precipitated Calcium Carbonate (PCC) can be synthesized from blood cockle shell through three methods, namely the method of solvay, soda caustic, and carbonation. The method used in this research that was the carbonation process in the modification, the use of acid solvent during the slaking process to obtain higher yields. The purpose of this research was to synthesize precipitated calcium carbonate (PCC) of blood cockle shell by varying the type of solvent and acid carbonation time. A number of blood cockle shell powder was calcined at 900oC temperature to calcium oxide (CaO) form, then CaO was dissolved into some acid solvents (HNO3, HCl, and CH3COOH). Furthermore, the carbonation process with carbonation time variation 30, 60, and 90 minutes. Based on AAS analysis CaO content in the blood cockle shells was 76.66%, which detected as aragonite crystals. The highest yield of PCC was 84.42% for 90 minute carbonation time by using of HNO3 as solvent. For the XRD patterns it recognized that PCC contained mixture vaterit and calcite crystals. It also was supported by SEM analysis.Keywords: Blood cockle shell, Carbonation, Precipitated Calcium Carbonate (PCC), Variations acid.
Sifat Mekanis Geopolimer Ringan Berbahan Dasar Fly Ash Batubara Dengan Penambahan Semen Portland Dan Cairan Alkali Aktivator Reski, M.; Amri, Amun; Helwani, Zuchra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Geopolymer is an inorganic polymer material composed of Si and Al atoms arranged in a 3dimensional network (Si-O-Al) synthesized from aluminosilicate with an alkaline activator solvent. The use of this geopolymer can be used as a material for making lightweight concrete types of cellular lightweight geopolymer (CLG) which can be used as a construction wall for building blocks and brick red brick. This study aims to make a lightweight geopolymer based on fly ash coal using a foaming agent with the addition of sand, portland, and alkaline liquid activators and study the effect of adding cement Portland, and the amount of alkaline liquid activator on the mechanical properties of the resulting mild geopolymer. Making light geopolymers begins with preparing an alkaline activator solution made by mixing 10 M NaOH into sodium silicate with a ratio of (Na2SiO3 2.5/NaOH) to homogeneous, then the foaming liquid is made by dissolving the foaming agent using water with a ratio (foaming agent/water) 1:30, after which the foaming liquid is connected to the foam generator to produce the desired foam, then the process of mixing the raw material used is homogeneous. The mechanical geopolymer mechanical properties test results showed that the highest compressive strength of 2.15 MPa was obtained from variations in the amount of activator liquid 23% with the addition of 15% OPC, the lowest porosity 27.55% obtained from variations in the amount of liquid activator 23% with the addition of 15% OPC. Keywords: fly ash, geopolymers, light geopolymers, liquid activator, OPC
Pengaruh Konsentrasi Dan Rasio Berat Graphene Nanosheets (GNSS) Terhadap Karakteristik Hot Rolled Sheet (HRS) Bahri, Ahmad Syaiful; Amri, Amun; Shalahuddin, Muhammad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Hot rolled sheet (HRS) characteristics can be improved by adding additives in the asphalt. This study aims to analyze and determine the effects of concentration and weight ratio of graphene nanosheets (GNSs) additive on the characteristics of HRS. The research was carried out in several stages, starting from the preparation of graphite powder from 2B pencils, preparation of 60/70 penetration asphalt and aggregates, making GNSs solution using the turbulance assisted shear exfoliation (TASE) method and continued with the manufacture of HRS with variations in GNSs concentrations of 10 mg/ml, 20 mg/ml and GNSs weight ratios of 0%, 5%, 10%, 15%. The results showed that the concentration and weight ratio of GNSS could affect the stability value, flow and marshall quotient (MQ) of the HRS. The best results were obtained at a concentration of 20 mg/ml and a weight ratio of 15% GNSs, with a stability value of 1541.19 kg, flow of 4.13 mm and MQ of 391.74 kg/mm.Keywords : Asphalt, Graphene nanosheets (GNSs), Hot rolled sheet (HRS)
PENGARUH SUHU DAN WAKTU REAKSI TERHADAP PEMBENTUKAN NANOPARTIKEL MAGNETIT (Fe3O4) SECARA HIDROTERMAL Sari, Esty Octiana; Fadli, Ahmad; Amri, Amun
Jurnal Sains dan Teknologi Vol 18, No 1 (2019): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

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Abstract

Nanopartikel magnetit (Fe3O4) merupakan nanomaterial yang atraktif karena dapat diaplikasikan secara luas dalam bidang biomedis, elektronik, lingkungan, hingga pertanian. Metode hidrotermal merupakan salah satu metode sintesis sederhana untuk mendapatkan magnetit dengan ukuran terkontrol. Penelitian ini bertujuan menentukan pengaruh suhu dan waktu reaksi terhadap pembentukan nanomagnetit pada proses hidrotermal. Magnetit disintesis dari FeCl3, urea, sitrat dan polietilena glikol (PEG) pada suhu 180, 200 dan 220oC selama 1, 2, 3, 5, 7, 9 dan 12 jam. Hasil sintesis dikarakterisasi dengan XRD, TEM dan magnetometer. Hasil karakterisasi menunjukkan bahwa semakin tinggi suhu semakin cepat reaksi pembentukan magnetit. Semakin lama waktu reaksi, menunjukkan kecenderungan pada peningkatan kristalinitas dan ukuran partikel.
Konversi Termal Kayu Akasia (Acacia Mangium) Menjadi Bio-Oil Dengan Teknologi Pirolisis Menggunakan Katalis Mo/NZA Meliagustin, Adilla; Bahri, Syaiful; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Availability of petroleum fuels are increasingly limited. Limitations of petroleum fuels will not be balanced with the needs of the community will fuel increased day by day. To overcome these problems needed alternative energy sources that can be updated is one of the bio-oil. Bio-oil is produced from biomass with the pyrolysis process, in the absence of oxygen. The purpose of this research was the synthesis of bio-oil from akasia wood, determine the effect of the impregnation percentage of Mo metal and ratio of catalyst Mo/NZA on the yield of bio-oil and determine the physical and chemical characteristics of bio-oil. Pyrolysis using 50 grams acacia wood, 500 ml silinap and Mo/NZA catalyst with variations of the impregnation percentage of Mo metal 0%, 1%, 3% and 6%, and the variations ratio of catalyst Mo/NZA 3%, 6% and 9% of the biomass with a stirring speed of 300 rpm and a temperature of 320ºC for 120 minutes. In this research, the highest yield on the variation of the impregnation percentage of metal 3% and the ratio of catalyst 9% of the biomass amounted to 76,084%. Characteristics of bio-oil obtained were density 0,827 gr/ml, viscosity 2,032 cSt, acid number 88,677 mg NaOH /gr sample, and the flash point 43 oC. The results of GC-MS analysis, the dominant chemical components in the bio-oil were Cyclohexane (13,477%), 2,4-Hexadiene (2,610%), 6-Tridecene (1,920%), Propane (1,684%) and 4-Nonene (0,619 %).Keyword: Bio-oil, pyrolysis, catalyst Mo/NZA, akasia wood
Konversi Kayu Akasia (Acacia Mangium) Menjadi Bio-Oil Dengan Proses Pirolisis Menggunakan Katalis Ni/Lempung Hardi, Rizka Aulia; Bahri, Syaiful; Amri, Amun
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

Availability of fossil fuels as a non-renewable energy source has decreased due to the increase of energy consumption. Therefore, it is needed an alternative renewable energy sources, such as conversion of biomass derived from acacia mangium wood. Bio-oil can be produced by pyrolisis of Acacia mangium wood with catalyst Ni/clay. The purpose of this research are to produce bio-oil from acacia wood, to characterize of Ni/clay catalyst, to determine the effect of the impregnation of Ni metal in to clay and ratio of Ni/clay catalyst on the yield of bio-oil and to determine the physical and chemical characteristics of bio-oil. The pyrolysis was used 50 grams acacia wood, 500 ml silinap and Ni/clay catalyst with variations of the percentage of the Ni metal 0%, 1%, 2%, 3%, respectively and the variation ratio of Ni/clay catalyst of the biomass 3%, 5% and 7% with a stirring speed of 300 rpm and a temperature of 320ºC for 120 minutes. In this research, the highest yield was on the use of the catalysy Ni/clay 5% by weight of the metal content of 3% by 66,26%. Characterization of physical properties of bio-oil obtained in the form of density 1,004 gr/ml, 1,8452 cSt viscosity, acidity 71,6327 mg NaOH/gr sample, and the flash point 46oC, respectively.Keywords: Bio-oil, Pyrolysis, Catalyst Ni/Clay, Acacia mangium wood
Co-Authors AA Sudharmawan, AA Abda Abda Abdul Rasyid Amrin Abid, Hussein Rasool Achmad Noerkhaerin Putra Adrianto Ahmad Affandi Affandi Ahmad Fadli Ahmad Fadli Ahmad Fadli Aisyah Dewi Ranti, Aisyah Dewi Akbar, Irfan Sarhadi Alfarizi, Cory Dian Alfatlian, Alfatlian Ali Novia Altarawneh, Mohammednoor Aman Aman Aman, Azka Amila, Khairati Aminati, Ikha Setya Amir Awaluddin Amri, Evelyn Andrizal Andrizal Ani Suryani Anjani, Putri Annisa Rahmat Apriadi Rio Ari Sandhyavitri Arisman Adnan Assylzhan, Mazhibayev Azhar, Muhammad Rizwan Azhari Harahap Azridjal Aziz Bahri, Ahmad Syaiful Bahruddin Bahruddin Bahruddin Bahruddin Bahruddin Benny Ahmadi Bona Tua Chairul Chairul Chairul Damayanti, Elok Deden Saprudin Dedeng Hermoyo Derry Hanriansyah Pratama Desi Heltina Dhini Octavianty Dimas Nofriyan Dumaria, Agustina Dwi Setyo Pambudi, Yoyok Ekawati, Lestari Elmira, Kambarova Erliza Hambali Esty Octiana Sari Esty Octiana Sari Eva Rantika Evelyn Evelyn Evelyn Evelyn Evelyn Evi Nadhifah Fabryza, Dhina Fajar Restuhadi Fajrina Qaishum Fakhri, Fakhri Fauziyah, Hidayatul Febri Riandi Febrizal Ujang Febryza, Dhina Feby Pratama Nugraha Fesya Putri, Andini Firman syah Fitri, Lara Ismano Fri Murdiya, Fri Gilang Fathurrahman Gilda Miranda Gussyafri Hasnul Bustaman Hawa, Karfika Ainil Hawa, Karfika Ainil Hendri, Yola Bertilsya Hendro Ekwarso Heni Sugesti Heri Rahmana Indra Yasri Irwan Irwan Is Sulistyati Isna Rahma Dini Iwantono Iwan Barnawi Jhon Armedi Pinem Jiang, Zhong Tao Jumbri, Khairulazhar Karfika Ainil Hawa Khairat Khairat Khairat Khusnul Ain Komalasari Komalasari Komalasari Komalasari Komalasari Lisa Legawati Lucy Rahmawati M. Fauzan Akbar M. Iwan Fermi M. Yogi Riyantama Isjoni Malindo, Muhammad Eri Maria Peratenta Sembiring Mawaddah Mawaddah, Mawaddah MAYANG SARI Mayangsari Mayangsari Meliagustin, Adilla Michael Hutapea Miran, Hussein A. Mochamad Reizal Ath Thariq Monita Olivia Muhamamad Rizky Zuriadi Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Sugandi Muhammad Zaqi Muhdarina Nabellia Nisa Mulya Novan, Andre Novia Azzahra Nurhayati Nurwijayanti Nurwulandari Saputri Ohi, Hiroshi Oktariandi, Vito Paul Destin Purba Peratenta Sembiring, Maria Perdana, Rendy Putra Peter Peter Prawiranegara, Barata Aditya Puji Rahmawati Dwi Sukma Putra, Rahmat Ade Putri Arini Putri Husni Hidayah, Putri Husni Putri, Diana Eka Rahayu, Ricky Puji Rahmadahana, Suci Rahman, M Mahbubur Rahman, M. Mahbubur Rahmansyah Rahmansyah Rahmat Kurniawan Nasution Rahmi, Sri Wahdini Rani Handayani Reni Yenti, Silvia Reski, M. Rifati Hanifa Rino Rinaldi Rizka Aulia Hardi, Rizka Aulia Rizky, Muhammad Dian Rozanna Sri Irianty Russita Martani Russita Martani Rusydy ' Salma Liska Saputra, Adika Saputra, Fakhri Sari Rahma Yanti Sari, Esty Octiana Sarma, Deki Septian, Handika Setia Utama, Panca Setiani Br Manurung Silvia Reni Yenti Silvia Reni Yenti Suci Afrianti Sukoco Sukoco Sukoco Sukoco Sulistyo Saputro SUNARNO Sunarno Sunarno Sunarno SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Syukri Hamdani Tafrikhatul Walidah Tao Jiang, Zhong Utama, Panca Setia Voadi, Salsabilla Diva Wilda Zakiah Windy Odelia Putri Wira Irawan Rossani Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti, Wisrayetti Wulandari, Revika Yang, Chun-Chen Yelmida Azis Yolanda, Yogi Yopalim Zanstra Yoselino, Danil Yosi Alwinda Yosi Alwinda, Yosi Yusnimar Sahan Z Zulfansyah Zikri, Ahmed Zuchra Helwani, Zuchra Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar, Zultiniar Zuqni Meldha