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All Journal Jurnal Sains dan Teknologi Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Pertanian Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Unri Conference Series: Community Engagement Indonesian Journal of Chemical Science and Technology Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability Indonesian Journal of Fundamental Sciences Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Ahmad Fadli
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities 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 Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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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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Abstract

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.
Pelapisan Hidroksiapatit Di Permukaan Stainless Steel 316L Menggunakan Metode Dip Coating Dengan Variasi Jumlah Hidroksiapatit Ulfah Naida Marbun; Ahmad Fadli; Silvia Reni Yenti
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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Abstract

The 316L stainless steel is widely used as implant, but it still has some downsides such as low biocompatibility and it will release metal ion in the body. Therefore coating the surface of the metal with hydroxyapatite is done to resolve these problems. Coating thickness is an important parameter in the coating process. The purpose of this research is to study the effect of HA amount to the coating thickness. The procedurs in this research are making of HA slurry, substrate preparation, coating process, drying and sintering. The fixed variables in this research are 3 gram of polyethylene glycol, 54 ml of aquades, stirring rate of 300 rpm for 20 hours, immersion time is 10 seconds, drying at 110 °C for 30 minutes, sintering at 700 °C for 1 hour, one time dipping, substrate starilization for 15 minutes, and substrate drying at 110 °C for 10 minutes. The changeable variable is the amount of HA as much as 18 and 24 gram. This study concluded that the more amount of HA used, the thicker coating thickness achieved. The HA coating thickness achieved in this research are in the range of 126-223 μm.Keywords: coating thickness, dip coating, hydroxyapatite, 316L stainless steel.
Evaluasi Pressure Drop Pada Sumur Injeksi Uap Di Lapangan Duri Dengan Persamaan Beggs-Brill Dan Moody Ahmad Riadi S Hasibuan; Bahruddin Bahruddin; Ahmad Fadli
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

Steam injection is a heat transfer process to petroleum reservoir through multiphase flow of wet steam. Estimating pressure drop in multiphase flow is more difficult than for single-phase flow. Multiphase flow is a complex phenomenon because of the interdependence of various variables that affecting pressure drop such as flow regime, hold up, flow geometry at horizontal, vertical or deviated, flow rate of each phase and the fluid properties of each phase. The purpose of this study is to find out the most appropriate model to calculate the pressure drop in steam injection wells and understand parameters that most affecting pressure drop. Research methodology for this study is descriptive analysis. Field data from 30 injection wells in Duri field are collected and compared with 2 variations of Beggs-Brill and Moody equation, which are the original model and the model with Palmer correction. Both models are translated into a simple computing program using Excel application. Calculation result from the model is compared with the measurement results to understand the deviation or error. As the result of this study, it is shown that Beggs-Brill and Moody model without Palmer correction is suitable for steam injection application. Average error is only 0,2% with a standard deviation of 3,32%. Further information is obtained from the sensitivity analysis that the accuracy of pressure drop calculation is affected by measurement accuracy of the steam flow rate, steam quality and steam temperature. Keyword: Beggs and Brill correlation, Moody diagram, Palmer correction, pressure drop, steam injection.
Sintesis Magnetite/Hidroksiapatit Composite Menggunakan Metode Presipitasi Dengan Variasi Magnetite Dan Suhu Pemanasan Wiriyan Jordy; Ahmad Fadli; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Technologies in era of globalization had been improved especially for human health in biomedical. Magnetite/Hydroxyapatite composite is one of new promising idea as drug carrier for a drug delivery application. The purpose of this research is synthesis of the composite by using magnetite & hydroxyapatite, and analyze the effect of percentage of Fe and heating temperature to the characteristic of the composite were produced by using precipitation method. The powder of magnetite was dispersed in 50 ml of aquadest and mixed with Ca(NO3)2.4H2O for 30 minutes, and (NH4)2HPO4 added to the suspense. The pH of suspension was controlled by added NH4OH 25% until pH 11 with reaction for 120 minutes at 90ºC. The suspension was aged for 1 day, washed and separated the precipitated from suspense. The precipitate was dried until 1 day at 70ºC and ended with calcined the precipitate for 3 hours at 400ºC until powder of composite was collected. The powder of composite was characterized with XRD, and VSM. The higher heating temperature to 90ºC had affected higher crystallinity from 80.68% to 86.58%. However, the higher percentage of Fe had affected the crystal size of magnetite from 14.744 nm to 19.894 nm, with a good magnetization value was 8.81 emu/g. Based on the resulted from characterized of the composite, were concluded for the synthesis of composite magnetite/hydroxyapatite were succeeded and can be applied as a drug carrier in the drug delivery system. Keywords : composite, drug carrier, hydroxyapatite magnetite.
Model Kesetimbangan Pada Adsorpsi Ion Logam Timbal (Pb2+) Menggunakan Hidroksiapatit Dhamala Shobita Chandra; Ahmad Fadli; Komalasari Komalasari
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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Abstract

The needs for industrial wastewater treatment for heavy metal have been a concern. Adsorption using hydroxyapatite (HAp) as adsorbent is one of the choice to remove heavy metal content economically and efficiently. The objective of this research is to study the effect of temperature and weight of adsorbent in adsorption as well as determine adsorption equilibrium model in the lead ion adsorption using Langmuir, Freundlich, and Temkin model. Lead (Pb2+) solution of 5 ppm was added with 0.9 gram, 1.0 gram, and 1.2 gram of HAp in a beaker glass and stirred with stirring rate of 300 rpm and temperature variation of 30°C, 40°C, dan 50°C. Solution samples was taken every 10 minutes until equilibrium and and analyzed for the remaining Pb2+ using ICP-OES instrument. The results showed that the increase of temperature reduce the rate of Pb2+ adsorption and increased of the weight of adsorbent increase the percentage of adsorption. The equilibrium time of lead ion adsorption is 50 minutes, with optimum condition obtained on 30°C and hydroxyapatite adition 1.2 gram. Equilibrium model describes the heat of adsorption and thermodynamics parameter of adsorption process, ∆H = -0.53 kJ/mole, ∆G < 0, ∆S = -144.1406 kJ/mole). Keywords: hydroxyapatite, adsorption, adsorpsion equilibrium model, lead (Pb2+)
Pengaruh Kadar Filler Abu Sawit (Ukuran Direduksi) Dan Temperatur Pencampuran Terhadap Morfologi Dan Sifat Komposit Polipropilen/karet Alam Melda Helena S; Bahruddin Bahruddin; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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Abstract

Morphology and properties of composites PP/NR is influenced by the condition of the rawmaterial mixing process between the phase and compatibility. The purpose of this study was toinvestigated the effect of blend content filler fly ash and mixing temperature on morphology andmechanical properties of polypropylene (PP)/NR composite. Filler size is reduced by MechanicalMilling process until the filler size ≤ 700 nm. Variation of blend kontent fly ash (reducted particlesize) 30, 40, 50 and 60 phr were studied in order to determine the optimum content of fly ash(reducted particle size). The rubber compound  has been made by two roll mill at ambienttemperature and 20 rpm rotor speed. Dynamic vulcanization was done on internal mixer at variousmixing temperature 170 oC, 175 oC, 180 oC , and 185 oC. Rotor speed on internal mixer at 60 rpm.The mechanical properties was done by Universal Testing Machine (UTM) and the morphologywas examined by Scanning Electron Microscopy (SEM). The optimum result was found at thecontent of fly ash (reducted particle size) 40 phr and the optimum temperature  was 175oC. The bestmechanical properties was given on tensile strength 4,3 MPa, elongation at break 28,1 % and modulus elastic 104,2 MPa.Keywords: ash oil, composites PP / NR, mechanical properties, natural rubber,  polypropylen.
Sintesis Komposit Fe3O4/Hidroksiapatit Menggunakan Metode Kopresipitasi Dengan Variasi Suhu Sintering Dan Penambahan Fe3O4 Dion Julio Iskandar; Ahmad Fadli; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Abstract

Magnetite/Hydroxyapatite composite is one of the media as drug carrier for a drug delivery system. The purpose of this research is synthesis of the composite, and analysing the effect of percentage of Fe and sintering temperature to the characteristic of the composite. The powder of magnetite was dispersed in 100 ml of aquadest and mixed with 33,7 mmol Ca(NO3)2.4H2O for 15 minutes, and 20 mmol (NH4)2HPO4 added to the suspense. The pH of suspension was controlled by added NH4OH 25% until pH 11 and left for reacting for 120 minutes at 90ºC. The suspension was aged for 1 day, washed and then the precipitate was separated from the suspense. The precipitate was dried for 1 day at 90ºC and ended with sintering the precipitate for 2 hours at variable temperature until powder of composite was collected. The powder of composite was characterized with XRD, VSM and FESEM. The increase of sintering temperature from 400ºC to 800ºC affecting the sample crystallinity from 14,22% to 22,55% and the magnetic saturation value from 17,2 emu/g to 4,0 emu/g. Based on the resulted from characterized of the composite, concluded that the synthesis of composite magnetite/hydroxyapatite were succeeded.Keywords :drug carrier, hydroxyapatite, composite, magnetite, coprecipitation
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (Pcc) Cangkang Telur Itik Melalui Proses Hidrotermal Dengan Variasi Ph Dan Waktu Reaksi Miftah Anugrah; Yelmida Azis; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is one of the calcium phosphate compounds, which is the main inorganic component of human’s hard tissue such as bones and teeth. Hydroxyapatite (HAp) is a material used as an implant, adsorbent, and catalyst. The purpose of this study were to obtained product of hydroxyapatite from duck egg shell, studied the effect of variations in pH and reaction time on diameter of crystals and degree crystallinity of hydroxyapatite, and obtained the optimum conditions based on variations given. In this study, duck egg shell PCC and (NH4)2HPO4 were reacted using hydrothermal vessels with variations in pH of reactants at 8, 9, 10, 11, and 12, reaction time 15 and 16 hours, ratio of Ca/P 1,77 and HAp being synthesized at 140oC. The results were analyzed using X-Ray Diffractometer (XRD), Scanning Electron Microscopy (SEM-EDX), and Brunaeur-Emmet-Teller (BET). The result shows, the best hydroxyapatite were obtained at 15 hours of reaction time and pH 12 with diameter of crystals 26,91 nm, crystallinity 74,28%, ratio of Ca/P 1,60, and surface area 30,017 m²/g.Keywords: Hydroxyapatite, Hydrothermal, Crystallinity, PCC
Pelapisan Permukaan Stainless Steel 316L Menggunakan Hidroksiapatit Dengan Metode Deposisi Elektroforesis Muhamamad Rizky Zuriadi; Ahmad Fadli; Amun Amri
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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Abstract

Hydroxyapatite (HA) is ceramic that can be used as bone implants and teeth. However hydroxyapatite has a weakness in terms of its weak physical properties so it need to be modified with hydroxyapatite coating on a metal surface. The purpose of this study is to determine the influence of pH and concentration of hydroxyapatite. Hydroxyapatite was coated on the surface of Stainless steel using electrophoretic deposition method. HA suspension with concentration 0,025 and 0,075M were made by mixing 0,0425 and 1,3575 gr with ethanol and then set to pH 3,4 and 10 by adding HNO3 and NH4OH. Subsequently, the coating process was carried out by dipping Stainless steel and carbon electrode into hydroxyapatite suspension. The hydroxyapatite suspension was electrified with a voltage of 60 V for 2 minutes. Then hydroxyapatite coating was calcined with temperature of 800o C for 2 hours. SEM analysis shown that the thickness of HA deposits was 32-52 μm at HA concentration of 0,025 M and it increased to 42-57 μm at HA concentration of 0,075 M. The thickness of HA deposists was 60-80 μm at pH 3 and it decreased to 40-50 μm at pH 10. corrosion rate analysis shown that HA coating can reduce corrosion rate of stainless steel. FTIR analysis showed PO43-, OH, and H2O groups that indicates the content of hydroxyapatite from sample. Keywords : coating, electrophoretic deposition, hydroxyapatite, stainless steel
Kinetika Adsorpsi Ion Logam Cu2+ Menggunakan Tricalciumphosphate Sebagai Adsorben Dengan Variasi Kecepatan Pengadukan Dan Temperatur Mustika Canra; Ahmad Fadli; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

One of the heavy metals can pollute the waters is metal ions Cu2+. The purposes of this research are to observe the effect of stirring rate and temperature on the adsorption of metal ions Cu2+ using adsorbents tricalciumphsphate (TCP) and determine a suitable adsorption kinetics model. The procedure was begun by adding 1 gram of TCP into Cu2+ solution with a concentration of 3 ppm at stirring speed of 100 rpm, 200 rpm, and 300 rpm and a temperature of 30oC, 40oC, and 50oC. Samples were taken every 2 minutes, filtered and analyzed by atomic absorption spectrophotometer (AAS). The result demonstrated that the suitable kinetic model for adsorption of metal ions Cu2+ using TCP adsorbent is pseudosecond order kinetic model with adsorption kinetics constant value of 3,125 g/mg.min. The increased the stirring rate and temperature increase adsorption rat . Type of this adsorption is physics adsorption with activation energy value of 25,016 kJ / mol.Keywords: Adsorption kinetics model, the metal ion Cu2+, tricalciumphosphate, stirring rate and temperature.
Co-Authors Abdul Rasyid Achmad Noerkhaerin Putra Ade Pratama Adela Shofia Addabsi Adha Widoni Adi Maulana Putra Adi Mulyadi Putra Adrianto Ahmad Afrila Afrila Agung Prabowo Agung Prabowo Agung Prabowo Agung Prabowo Ahmad Riadi S Hasibuan Ahmad Zaki Alfarisi, Cory Dian Allailus Syah Safara Allailus Syah Safara Alltop Amri Ya Habib Amun Amri Annisa Aprilya Putri Annisa Rahmat Ari Aditia Sukma Sukma Arisman Adnan Ariya Eka Alel Arosyidin Arosyidin Aulia Permatasari Aulia Permatasari Bahruddin Bahruddin Benny Ahmadi Bima Wandika Putra Charismayani Charismayani Damayanti, Elok Debora Tambunan Deden Saprudin Deni Astika Deni Noviana Derry Hanriansyah Pratama Deska Deska Dewi Indah Pratiwi Dhamala Shobita Chandra Dhanang Hayuningwang Dion Julio Iskandar Dovy Reyandi Drastinawati Drastinawati Drastinawati Drastinawati Dwi Yerlis Rahmi Edy Saputra Ervina Ervina Esty Octiana Sari Esty Octiana Sari Fachry Abda El Rahman Fadhil Mubarak Fajril &#039; Akbar Fajril Akbar Feblil Huda Ferdy Ashari Syawal Fernando Susilo Gading Bagus Mahardika Gede Indra Ludy Wirata Heni &#039; Ismawati Heni Ismawati Heni Sugesti Herry Novriansyah Idral Amri Ika Karina Ilham Habib Indah Fitriani Indra Purnama Indra Yasri Ines Indriyani Irdoni HS Irdoni Irdoni Iwantono Iwan Barnawi Jabosar Ronggur Hamonangan Panjaitan Jenial S Julharmito Julharmito Komalasari Komalasari Lia Yuningsih Lilis Suriani Luci Octaria M Satria Haruda Marlinda MAYANG SARI Mayangsari Mayangsari Melda Helena S Miftah Anugrah Mochamad Reizal Ath Thariq Muchlis Ade Putra Muh Irwan Muhamamad Rizky Zuriadi Muhammad Hamdani Muhammad Reski Muhammad Syafiq Izzuddin Mustika Canra Mutamima, Anisa Nisa Mulya Nissa Aqhilla Novika Sri Wardani Nuraina Siregar Nurfajriani Nurfajriani Nurfatihayati Nursyaniati Nursyaniati Nurul Afifah Ongky Alexander Ongky Alexander Padil Padil Panca Setia Utama Pancasila Putri Peter Peter Prihartini Widiyanti Putri Arini Putri Rahmadani Rahimah Rahimah Rahmad Rasyidin Rani Handayani Rathesa Najela Rawdatul Fadila Ridho Wijaya Riki Rahmadhan Rio Andika Ririn Puji Hastuti Rozanna Sri Irianty Rusydy Rusydy &#039; Septiana Veronika S Silvia Reni Renti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenty Siska Priscillia Aledya Siti Chotijah Sri Murda Niati Sri Murda Niati Subkhan Maulana Suhendri Sukoco Sukoco Sukoco Sukoco Sunarno Sunarno Sunarno Sunarno Syarifuddin Oko Syelvia Renni Yenti Thomson Simanjuntak Toni Ardi Ulfah Naida Marbun Wan Elsa Novtari Adiani Wasty Rusjaya Wilda Zakiah Wiriyan Jordy Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wyda N Saragi Yelmida Azis Yelmida Aziz Yesi Afriani Yogi Yolanda Yunus Olivia Novanto Zakwan Zuchra Helwani Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar