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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 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 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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Pengaruh Penambahan Graphene Oxide Terhadap Sifat Bioplastik Berbasis Sagu Rifati Hanifa; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bioplastics are an alternative for conventional plastics that are biodegradable because it can be made from natural materials that can be decomposed by the environment. Bioplastics can be made from sago starch and filler of graphene oxide because its availability and it can improve the mechanical properties of bioplastics. This study aims to make bioplastic from sago starch with the addition of graphene oxide while studying the effect of adding graphene oxide and stirring time for bioplastic mechanical properties. The making of bioplastic was performed by using solution intercalation method while the graphene oxide was synthesized by using Hummers modification method and it produced the dispersed of graphene oxide in the solution. The analyzes were graphene oxide crystallization test, mechanical properties test (elongation and modulus young), morphological test, functional group qualitative test of bioplastic composite and graphene oxid and bioplastic biodegrability. The result of bioplastic tensile strength analysis showed that the addition of graphene oxide and stirring time influenced the bioplastic mechanical properties where the highest tensile strength was 4.018 Mpa for 15% graphene oxide with 50 minute and bioplastic can be naturally degraded 70-80% within 8 days with the highest hydrophobicity of 88.7%. Bioplastic morphological analyzes have shown that 50 minutes stirring time has evenly distributed the filler.Keywords: bioplastic, graphene oxide, hummers, solution intercalation, sago starch.
Sintesa Precipitated Calcium Carbonate (PCC) Dari Cangkang Kerang Darah (Anadara Granosa) Dengan Variasi Ukuran Partikel Dan Waktu Karbonasi Lucy Rahmawati; Amun Amri; 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) is a product of the processing of natural materials containing calcium carbonate resulting from the precipitation process with high purity. Bloodcockle shell can be used as a source of calcium for precipitated Calcium Carbonate. The purpose of this study to produce PCC of waste shells blood with carbonation method and determine the particle size of the PCC and the best carbonation time. Synthesis performed using carbonation method by adding nitric acid to the slaking process. Blood cockle shell samples prior shells calcined at a temperature of 900°C for 3 hours to form calcium oxide and then dissolved with nitric acid (slaking process) with a particle size variation CaO (+ 20-60; + 60- 100; +100-120) mesh forming CaNO3, then added ammonia to pH 12, the next process of Ca (OH)2 CO2 gas flowing until the time was varied (0.5, 1, 1.5) hours to form a white precipitate which is precipitated Calcium Carbonate. The use of inorganic acids in this study aims to improve the solubility of CaO in the slaking process so that a high yield of the products obtained.The highest yield of PCC obtained at treatment +100-120 mesh particle size and carbonation time of 1.5 hours, with the percentage yield of 88.58%. Results of analysis Atomic Absorption Spectrophotometry (AAS) obtained CaCO3 content of 76.6%. From the pattern of X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) can be seen form the resulting crystal is a mixture vaterit and calcite.Keywords : Blood cockle shell, Method of Carbonation , PCC , Particle Size , ,Time Carbonation
Eksperimental Penambahan Graphene Sebagai Zat Aditif Pada Campuran Asphalt Concrete Binder Course (AC-BC) Ali Novia; Muhammad Shalahuddin; Yosi Alwinda; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The type of pavement commonly used in Indonesia is flexible pavement that uses asphalt as its binding material. It is very important to maintain the characteristic of asphalt that functions as the aggregate adhesive in a mixture of asphalt concrete (laston). One way of maintaining or improving the characteristics of the laston is by using graphene as an additive. This study was aimed to examine and analyze the effect of adding graphene as an additive and to find out the most effective level of graphene addition in the asphalt mixture to the Marshall characteristics of the AC–BC laston mixture. This study combined the addition of graphene as an additive of 3.5%, 4%, and 4.5% of the weight of asphalt. The test results showed that the stability value of Marshall characteristics at optimum bitumen content conditions is increased. The highest stability value is found in the addition of 4.5% of graphene which is 1500 kg. The most effective level of graphene addition in the asphalt mixture against Marshall characteristics is by adding 4.5% graphene. The addition of 4.5% of graphene has the highest stability value with a difference of 200 kg or 14.81%, while the value of flow is 4,5 mm, VIM is 3.7%, VFA is 76%, VMA is 14,8%, and MQ is 350 kg/mm, all these values fulfill Bina Marga specifications 2010 revision 3, except the flow values.Keywords: Graphene, Marshall characteristics, AC–BC, Laston
Pembuatan Geopolimer Ringan Berbasis Fly Ash Batubara Dengan Penambahan Styrofoam Nurwulandari Saputri; Amun Amri; Aman Aman
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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This study aims to make coal fly ash based light geopolymers with the addition of styrofoam as a lightweight aggregate. The light geopolymers was prepared by mixing the coal fly ash and high concentration of alkaline activator solution, with styrofoam. The mixture was then molded and formed to the geopolymers mortar and cured at temperature of 25℃ for 28 days. The results indicated that the addition of styrofoam decreased the compressive strength and density of geopolymer mortar. The highest compressive strength was obtained from sample with the addition of 1.5% -wt styrofoam and the size of 1 > x ≤ 5 mm styrofoam, which 8.8 MPa. The mechanical properties of geopolymer mortar were affected by the amount of styrofoam added and the size distribution of styrofoam in the geopolymer matrix. Keywords : alkali activators, geopolymer, styrofoam
Pengaruh Penambahan Grafena Dan Waktu Kalsinasi Terhadap Karakteristik Batu Bata Puji Rahmawati Dwi Sukma; Amun Amri; Aman Aman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This study aims to produce bricks with the addition of few layers graphene (FLG) and to study the effects of graphene addition and calcination time to the characteristics of the bricks produced. The brick-graphene composites synthesis was started from the manufacture of FLG using the turbulence-assisted shear exfoliation (TASE) method. The graphene was then added to the prepared clay, and formed size 5x5x5 cm3 and dried at room temperature for a week. Then the bricks were calcined with variations of 1-5 hours, and the addition of graphene 5-15%wt in furnace at temperature of 800ºC. The mechanical properties of bricks were obtained from compressive strength and porosity tests. With the addition of graphene and the length of time calcination increased the compressive strength and decreases the porosity in bricks. The results showed that the highest compressive strength (6 MPa) was exhibited by sample with the addition of 15% wt graphene and 5 hours calcination time. The lowest porosity (8%) was showed by sample with the addition of 15% wt graphene and 5-hours calcination time. The structure and morphology of graphene were characterized with the fourier transform infrared spectrophotometer (FTIR) and scanning electron microscopy (SEM), while the crystal size of graphene was probed using the diffraction x-ray (X-RD). The XRD test showed the crystal size FLG of 25.5nm, while the SEM results show that graphene was evenly diffused.Keywords : additives, graphene, clay, compressive strength, porosity
Hidrolisis Mikroalga Tetraselmis Chuii Menjadi Glukosa Menggunakan Enzim Selulase Novia Azzahra; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Microalgae Tetraselmis chuii is one of biomass which has a potential to be converted into glucose that can be used as raw materials for bioethanol production and other intermediate products. One of the process was used for glucose production by using enzymatic hydrolysis with enzyme cellulase. The purpose of this researches were to study the influence of the hydrolysis time and optimum conditions at enzymatic hydrolysis. The sequances of this research were raw materials analysis, enzymatic hydrolysis, and glucose analysis. The process of the hydrolysis by dissolving microalgae in a buffer solution of sodium acetate pH 5,5, pH was re-set by way of added to acetic acid in microalgae mixture. After certain pH was achieved, an enzyme cellulase was added into microalgae mixture and stirred at 100 rpm, the temperature of 400C and varied hydrolysis time. Manipulated variable on this study were hydrolysis time, namely 15, 45, 75 hours at the ratio of algae/enzyme 1:0,03. The results was obtained namely glucose, with the highest concentration of 2,78 g/L on operating conditions for 45 hours at the rasio algae/ enzyme 1:0,03.Keywords: cellulase, glucose, hydrolysis, Tetraselmis chuii, time
Pengaruh Rasio Solid Liquid Dan Penambahan Graphene Nanosheets Terhadap Kuat Tekan Mortar Geopolimer Berbasis Palm Oil Fuel Ash (POFA) Dan-Flyash Batu Bara Muhammad Zaqi; Amun Amri; Desi Heltina
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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Geopolymer mortar is a material that has high SiO2 and Al2O3 content and has the potential to be used as a base for making geopolymer mortar. This study aims to make geopolymerbased mortar (POFA) and coal flyash with the addition of graphene, and variations in the addition of graphene to the mechanical and morphological properties of the geopolymer mortar. The preparation of the geopolymer mortar includes several steps, namely the preparation and mixing of materials with various solid liquid ratios of 72:28, 60:40, and 80:20, then proceed with the preparation of an activator alkaline solution (10 M NaOH + Sodium silicate) and the addition of graphene with variations of 0%, 1% wt, 2% wt, and 3% wt. The results of the morphological analysis showed that the increased cavity that was formed increased along with the increase in the amount of graphene added. While the results of the compressive strength test showed that the highest compressive strength was obtained at 19,2 Mpa at a solid liquid ratio of 60:40 and the lowest compressive strength was obtained at 12,8 Mpa at a solid liquid ratio of 80:20. Keywords : geopolymer mortar, coal fly ash, graphene, POFA
Pengaruh Kosentrasi NaOH Dan Jumlah Grafena Oksida Pada Geopolimer Berbasis Limbah Fly Ash Pabrik Kelapa Sawit Gilang Fathurrahman; Amun Amri; Chairul Chairul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Geopolymers are the result of synthesizing inorganic polymers by reacting high concentrated alkali solutions with Si and Al minerals contained in fly ash. The use of these geopolymers can reduce consumption levels of OPC use in the construction industry. This study aims to create geopolymer based fly ash palm mill with the addition of graphene oxide as filler and Determine the effect of NaOH concentration and the amount of grafena oxide addition to geopolymer compressive properties as well as to study the morphological and physical-chemical structure in geopolymer. Geo-polymer preparation includes several steps of fly ash and sand preparation and then continued by making alkali activator solution (NaOH + Sodium silicate) with 6 M, 10 M and 14 M variations and grafena oxide addition with 0%, 0.2% wt, 0.4% wt, and 0.6% wt. The results showed that the highest compressive strength on the addition of NaOH concentration of 14 M and the addition of 0.6% wt of oxena oxide is 13.2 Mpa on and the lowest compressive strength is produced at the concentration of NaOH 6 M and without the addition of GO that is 5.1 Mpa. This study shows that the addition of graphene oxide can increase the compressive strength of the geopolymer and NaOH as an alkaline solution can reduce the GO sheet into rGO sheets and create an increasingly denser geopolymer structure as the NaOH concentration increases.Key words : Geopolymer, Fly Ash, Graphene Oxide
Pembuatan Bioplastik Berbasis Pati Ubi Jalar Dan Polyvinyl Alcohol (PVA) Menggunakan Graphene Sebagai Filler Dan Gliserol Sebagai Plasticizer M. Fauzan Akbar; Amun Amri; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The aim of this research is to study the impact of graphene and glycerol addition on the mechanical properties, functional group, biodegrability, water uptake and morphology of the sweet potato and polyvinyl alcohol (PVA) based bioplastic. Bioplastics were synthesized using solution casting method with graphene addition of 0, 1, 2, 3%wt and glycerol addition of 20, 30, 40%wt into the sweet potato starch-PVA polyblend. Bioplastics were then tested their mechanical properties, morphology (SEM), functional group (FTIR), biodegrability, and water uptake analysis. The results showed that the addition of graphene increased the tensile strength, and the Young modulus, but decreased the elongation. Meanwhile, the addition of glycerol increased elongation, but decreased the tensile strength, and the Young modulus of bioplastics. The bioplastic produced using 3% of graphene and 20% of glycerol had the best mechanical properties with tensile strength of 16.76 MPa, elongation of 95.505%, and Young modulus of 17.549 MPa. Water uptake and biodegrability decreased as the increase of graphene content and increased as the increase of glycerol content. The sweet potato – PVA based bioplastic with the addition of graphene has a good perspective to develop further.Keywords : bioplastic, glycerol, graphene, mechanical properties, PVA, sweet potato starch
Analisa Pengaruh Perbandingan Debit Bahan Bakar Gas Dengan Udara Pembakaran Terhadap Efisiensi Boiler Di PT. Chevron Pacific Indonesia Derry Hanriansyah Pratama; Ahmad Fadli; Amun Amri
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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Boiler is an equipment to generate steam. Steam has heat value in which used for some process. In this case, steam has been used for liftingoil from reservoir as an enhanced oil recovery. Operate boiler efficiently is a must. Operate boiler more efficiently can be achieved by fuel gas and air combustion adjustment. The objectives of this research are to know influences of excess oxygen for boiler efficiency and to know right composition between fuel gas and air combustion. Fix variables in this research are feed water flow (110 GPM) and heat value of fuel gas (1,000 BTU/scf). Fuel gas flow and air combustion flow are the adjustable variable. Fuel gas flow was adjusted in 5 flow variances (1050, 1070, 1090, 1110, and 1130 MSCFD). Air combustion flow was adjusted in 5 flow variances (70, 75, 80, 85, and 90% of louver opening). According to analysis results, the most efficient of boiler operation was 81.55%. That was achieved by 1050 MSCFD of fuel gas flow and 70% of air combustion flow. Boiler efficiency will decrease 2% in every 1% of excess oxygen increase.Keyword: boiler, steam, combustion, efficiency.
Co-Authors AA Sudharmawan, AA 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 Ali Novia Altarawneh, Mohammednoor Aman Aman Aman aman Aman, Azka 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 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 Fitria, Anisa 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 Lisa Legawati Lucy Rahmawati M. Fauzan Akbar M. Iwan Fermi Malindo, Muhammad Eri 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 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 Rahmansyah Rahmansyah Rahmat Kurniawan Nasution Rahmi, Sri Wahdini Ramadhan Ramadhan 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 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 Yosi Alwinda Yosi Alwinda, Yosi Yusnimar Sahan Z Zulfansyah Zikri, Ahmed Zuchra Helwani, Zuchra Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar, Zultiniar Zuqni Meldha