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All Journal EKSAKTA: Journal of Sciences and Data Analysis POSITRON Techno: Jurnal Penelitian Edu Sains: Jurnal Pendidikan Sains dan Matematika IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) AL ISHLAH Jurnal Pendidikan Jurnal Penelitian Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Redoks JURNAL PENDIDIKAN TAMBUSAI Aptisi Transactions on Technopreneurship (ATT) Kinetika Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Teknologi International Journal of Research in Vocational Studies (IJRVOCAS) Aptekmas : Jurnal Pengabdian Kepada Masyarakat Chemical Engineering Journal Storage (CEJS) Proceeding ISETH (International Summit on Science, Technology, and Humanity) Internet of Things and Artificial Intelligence Journal Innovative: Journal Of Social Science Research Bioedunis Journal International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Applied Engineering, Innovation, and Technology Journal of Experimental and Applied Physics
Yohandri Bow
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RANCANG BANGUN ALAT PENGERING TIPE TRAY DENGAN MEDIA UDARA PANAS DITINJAU DARI LAMA WAKTU PENGERINGAN TERHADAP EXERGI PADA ALAT HEAT EXCHANGER Mahardhika, Lintang Putri; Lestari, Sutini Pujiastuti; Bow, Yohandri
KINETIKA Vol. 7 No. 1 (2016): KINETIKA 01032016
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Drying is one way to remove or eliminate some of the water of a substance by evaporating most of the water contained through evaporation heat energy. The purpose of this research was to determine the length of time the drying of the moisture content of crackers and aware of any changes exergy of steam and changes exergy of air in the heat exchanger tools during the drying process. Exergy can be defined as the maximum employment potential in the form of material or energy that interacts with the environment. The longer the drying time then changes exergy of steam and changes exergy of air generated increased, this is due to the heat lost from the boiler so that it can affect the heat that will be up to the drying chamber. The more amount of the change exergy of steam and changes exergy of air, the lower the content of water in crackers. The water content in the crackers meet the standards of ISO 2713.1: 2009. At the time of 6 hours produces water content of 12.20%, at a time of 6.5 hours to produce 11.64% moisture content, at the time of 7 hours to produce 11.29% moisture content.
PREVENTION OF CORROSION RATE BY NATURAL INHIBITOR PAPAYA LEAF EXTRACT Bow, Yohandri
KINETIKA Vol 3, No 3 (2012): KINETIKA 01112012
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

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Abstract

Corrosion is an event of damage or deterioration of a metal caused by reaction with the environtment. Corrosion process can be prevented by the addition of corrosion inhibitor. Papaya leaf extract is an organic material that could potentially be used as a corrosion inhibitor because it contains N-acetyl- glukosamida and amino acid. The purpose of this study is  to determine the effects of brine concentration and surface area on the rate of corrosion of a metal plate that can be used as reference incorrosion control on metal plate. Determination of corrosion rate use weight loss methods, with medium marinade variation 3.5%, 5% and 6.5% salt water and a sample of the iron plates of different sizes. Each concentration of the medium contained four samples with different sizes of iron plates immersed for 30 days. The results showed the highest corrosion rate found on a metal plate without inhibitor with a value of 0.1331 mm/ year . The  greater concentration of the medium the corrosion rate will be higher. The smaller surface area of iron plate the corrosion rate will be higher.
ANALYSIS CHLORINE DISSLOVED WITH ELECTROMETRIC Bow, Yohandri
KINETIKA Vol. 6 No. 2 (2015): KINETIKA 01072015
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Based on Clark type electrode, chlorine electrode has been made for measuring chlorine electrometrically. The electrode consisted of platinum working electrode, silver/silver chloride reference electrode, potassium chloride as an electrolyte, polyethylene polymer (32 μm thick) membrane and the electrode body was made of polyester resin. The result of the study indicated that the sensor was suitable for determining the dissolved chlorine at optimum operating characteristics with an applied voltage of 0.9 Volt, using saturated solution of potassium chloride as an electrolyte. The steady state reduction current was achieved after 12 seconds. The standard calibration curve (concentration dissolved chlorine-reduction current) showed a linier relationship in the range of 2.9 – 30 ppm. The analytical performance characteristic of the probe indicated: least square fitting test y = 0.4214x - 0.3714, sensitivity 0.3714 ppm/μA and detection limit 2.9 ppm.
PROTOTIPE PANEL SURYA BERBAHAN BAKU LIMBAH TRANSISTOR 2N3055 Bow, Yohandri
KINETIKA Vol. 8 No. 2 (2017): KINETIKA 01072017
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Sebagai sumber daya alam yang melimpah, pemanfaatan energi matahari menjadi energi alternatif dapat dilakukan dengan Proses Konversi Energi matahari menjadi energi listrik (solar cell). Energi matahari masih belum banyak dimanfaatkan secara optimal dikarenakan harga panel surya yang masih mahal. Solar cell berkembang seiring dengan teknologi semikonduktor. Produk semikonduktor telah banyak bertaburan di perangkat alat – alat elektronika salah satunya yaitu transistor. Satu transistor dapat menghasilkan tegangan sekitar 0,4-0,6 volt. Perancangan alat Prototype Power Suplay dengan bahan utama transistor 2N3055 sebanyak 96 buah. Dari hasil penelitian dan pengolahan data, Komposisi transistor tipe 2N3055 berdasarkan uji analisa SEM-EDX terdiri dari unsur Aluminium (Al) 45,55%, Carbon (C) 32,40%, Nb (Niobium) 13,42%, Zr (Zirconium) 7,02%, dan O (Oxygen) 1,61%. Faktor yang mempengaruhi efisensi panel sel surya yaitu rangkaian transistor, temperatur, intensitas cahaya, dan sudut kemiringan panel.
PENGOLAHAN SAMPAH LOW DENSITY POLYETHYLENE (LDPE) DAN POLYPROPYLENE (PP) MENJADI BAHAN BAKAR CAIR ALTERNATIF MENGGUNAKAN PROTOTIPE PIROLISIS THERMAL CRACKING Bow, Yohandri
KINETIKA Vol. 9 No. 3 (2018): KINETIKA 01112018
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The most popular of handling plastic waste up to now is with the 3R (Reduce, Reuse, Recycle). Hence the need for an innovation to reduce pollution resulting from plastic waste. One alternative way of handling plastic waste is to convert it into fuel or also called plastic pyrolysis process. Pyrolysis is the process of chemical decomposition of organic matter by heating without or little oxygen where the raw material will break the chemical structure into a gas phase. In this research, the design of plastic waste pyrolysis tool using thermal cracking method with infrared heating element. The raw materials used are Low Density Polyethylene (LDPE) and Polypropylene’s types plastic and the temperature that used in the reactor are 250°C, 300°C, and 350°C. The control variables are plastic waste mass, operating time, and pressure in the reactor. Of research results obtained in most product volume temperature 350oC as much as 68 ml plastic bins for Low Density Polyethylene with %yield of 6.34%. As for the plastic Polypropylene obtained also the most volume at 350oC as much as 70 ml with %yield 6.98%
ANALISA BAHAN BAKAR MINYAK HASIL PIROLISIS SAMPAH PLASTIK JENIS PP DAN PET TERHADAP KINERJA GENERATOR SET PADA PLTSA PLASTIK KAPASITAS 1000 WATT ., Zurohaina; ,, Tahdid; Zikri, Ahmad; Bow, Yohandri; ,, Zulkarnain; sari, Desi Nurmala; Wulandari, Nila; Putra, M. Rizky Adhitya
KINETIKA Vol. 10 No. 1 (2019): KINETIKA 01032019
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Plastic waste and energy is a big problem nowadays especially for big cities. Along with the growing population every year with a diverse community life activities always generate waste every day and energy consumption is increasing high. The limited of energy dependent on fossil energy forces the search for new alternative energy to replace fossil energy. One of the answers to the limitation of fossil energy is the conversion of plastic waste into liquid fuels by pyrolysis technology using plastic raw materials of Polyethylene Terephthalate (PET) and Polypropylene (PP). Which can be used as fuel in motor fuel or generator set to generate electricity in prototype unit of plastic waste generator by using dry coconut shell as Furnace fuel. The purpose of this research is to test the performance of generator sets using light Oil fuels (FRA) and Heavy Oil Fuel (FRB). Liquid fuels pyrolysis products are used as fuel generators to be converted into electrical energy with loads varying to a maximum load at 1000 watts for 10 hours per day. The results of this research obtained the value at the optimal load of 800 watts of electrical current that occurred at 4.37 amperes with 183 volt voltage, 2650 rpm rotation shaft genset, and fuel consumption / hour at 0.803 L / hour.
PRODUKSI GAS HIDROGEN DITINJAU DARI PENGARUH DUPLEX STAINLESS STEEL TERHADAP VARIASI KONSENTRASI KATALIS DAN JENIS AIR YANG DILENGKAPI ARRESTOR Bow, Yohandri; Sari, Ayu Permata; Harliyani, Ayu Dwi; Saputra, Bayu; Budiman, Ria
KINETIKA Vol. 11 No. 3 (2020): KINETIKA 01112020
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The potential for renewable energy is converting water into hydrogen gas through the electrolysis process. Electrolysis is the process of separating water molecules into hydrogen and oxygen gas by flowing an electric current. The electrolysis process is influenced by the type and concentration of catalyst, electrode, and the salinity of raw material. The electrolysis reactor prototype equipped with an arrestor to reduce risk of work accidents due to flashback fire. The results showed that in electrolysis process salinity value would be directly proportional to the gas produced from electrolysis the highest volume of hydrogen gas produced with a salinity of 8 ppt 100 ppm with a current of 35A. In the addition of a catalyst in the electrolysis process with current strength of 35 amperes the highest volume of hydrogen produced was 1.1744 liters at a concentration of 0.1M, for NaOH and with H2SO4 a gas with a volume of 1.2199 liters and a concentration of 0,1 M and the highest efficiency was obtained at a concentration of 0.1M of 40.1503% for NaOH and 41.7063% for H2SO4. In the arrestor test, it was found that filler material for stainless steel wool, copper powder, and aluminum oxide can prevent flashback fire.
Biofuel from Pyrolysis Waste Lube Oil of Refinery Unit III Using Fly Ash of Coal Combustion as a Catalyst Nedia Sandika; Yohandri Bow; Abu Hasan
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 3 (2021): October 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i3.130

Abstract

Lube oil waste obtained from Utilitis Unit, Crude Distillation Unit, Crude Distillation & Ligh End Unit at Refinery Unit III Plaju Palembang South Sumatra. The process of pyrolysis of lube oil waste using fly ash catalyst is expected to produce fuel oil. Lube oil waste pyrolysis uses Fly Ash catalysts with a total catalyst of 500 gr with a temperature range variation of 0-85oC, 85-16 oC, 165-250oC, 250-300oC, and 300-350oC, while pyrolysis of waste lube oil without catalysts with a variation in the temperature range of 0-85oC, 85-165oC, 165-250oC, 250-300 oC, and 300-350 oC. Temperature range variations are referenced based on boiling route solvent fraction (0-85 oC), premium fraction (85-165 oC), kerosene fraction (165-250 oC) and diesel (250-350 oC). Solvent fraction can not be analyzed because there is no product result whether it is pyrolysis process using catalyst or without catalyst, Premium Fraction is only produced using catalyst, Sulfur content analysis result, Mercaptane sulfur, Density meets Premium fuel specification except Octane Number 76.6. Sulfur content, Density and flash point analysis of pyrolysis products using catalysts and without catalysts in accordance with kerosene products in the market. Solar fraction of pyrolysis process using catalyst and without catalyst, Analysis results density, sulfur content, Total acid number, Water Content entered solar product specifications but cetane numbers 43.2 and 45.6 have not met the specifications of solar products. 
Design of Dry Cell HHO Generator using NaCl Solution for Hydrogen Production Arif Budiman; Muhammad Yerizam; Yohandri Bow
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 1 (2022): February 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i1.8

Abstract

Excessive use of electricity produces emissions, as well as carbon will have impact on global warming because electricity mostly still using fossil-based energy. Usage of other alternative energy is beneficial to reduce dependence on the use of fossil fuels. Researchers are currently working to reduce the use of fossil energy by using renewable energy. Among the most common alternative energies found is water, so this research focuses on designing dry cell type HHO (Hydrogen Hydrogen Oxygen) Generator technology with hydrogen gas water electrolysis. The HHO generator functions to break water (H2O) into hydrogen atoms and oxygen atoms, known as HHO. Electrolysis testing using NaCl and a storage tube to see the rise and fall of water from the gas produced. NaCl used weighing 20 grams, 50 grams, 75 grams, and 100 grams dissolved in 500 cc of water. The results of the data obtained, many uses of NaCl produce hydrogen gas faster, the data shows 100 grams of NaCl at 180-210 seconds produces a gas volume of 175 CC compared to 20 grams produces a gas volume of 75 CC, 50 grams produces 125 CC, and 75 grams produces 150 CC
Application of Nanosilica from Rice Husk Ash as Iron Metal (Fe) Adsorbent in Textile Wastewater Rusdianasari Rusdianasari; Muhammad Taufik; Yohandri Bow; Maryam Seyaski Fitria
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.7

Abstract

Heavy metals are considered hazardous to health if they accumulate excessively in the body. One way to remove iron metal ions by adsorption process uses adsorbents. In this study, removal of heavy metals such as ferrous metal (Fe) was adsorbed using an adsorbent in the form of nanosilica. Nanosilica is made from rice husk ash where rice husk ash contains 80-90% silica so that it can be utilized as a raw material in nanosilica synthesis. Synthesis of nanosilica was carried out using a solvent in the form of KOH with a variation of 1.5M concentration; 2.5M; 3.0M; 3.5M and 4.5M. The five types of nanosilica were applied to textile waste containing ferrous metal (Fe) with variations in a contact time of 5, 10, 15, 20, and 25 minutes. Waste containing iron metal that has been adsorbed was analyzed by atomic absorption spectrophotometry (AAS) to see the remaining iron content. From the analysis of AAS produced the smallest iron concentration of 0.186 ppm in nanosilica with 1.5 M KOH solvent. Nanosilica with 1.5M KOH solvent was characterized using a Scanning electron microscopy (SEM) -Energy Dispersive X-ray (EDX) tool to obtain a surface morphological size of 0.44 µm with 28.95% SiO2 content. 
Co-Authors ,, Tahdid ., Zurohaina Abdul Razak Abdul Wahid Abu Hasan Abu Hasan Afrianda, Teguh Ahmad Taqwa Aida Syarif AIDA SYARIF Al-Insyrah, Eyza Recwika Ali Ahmad Alwi Nofriandi Anisa, Widya Anwar, Suci Apriani, Akmecia Risqa Arif Budiman Arissetyadhi, Iwan Arizal Aswan Asrizal Audia, Washilla Aulia Asman Ayu Permata Sari Bachty, Hadri Baharuddin Baharuddin BAKHRANI RAUF Bayu Saputra Budiman, Ria Daniar, Rima Darozat, Fajar Mukharom Diah Iswandari Diah Rahmawati Effendy, Sahrul Erlinawati . Fadhlurrahman, M Revanza Fatahul Arifin Fatahul Arifin, Fatahul Fatria Fatria Fatria Febriana, Ida Festiyed Fitri Arsih Gabe, Totop Harjadi Gunawan Harliyani, Ayu Dwi Heru Afriansyah I Nyoman Sila Ibnu Hajar Ichsan Astanto Idham Mahenri Ifdil Ifdil Illahi, Kurnia Indah Purnamasari Isdaryanto Iskandar Jaya Utama Putra Jhora, Fadhila Ulfa Juanta, Palma Kalsum, Leila Kholidah , Nurul Leila Kalsum Leila Kalsum Lety, Trisnaliani Lufri Lufri M. Amir M. Reza Ramlan M. Syahirman Yusi Mahardhika, Lintang Putri Mairizwan, Mairizwan Manggala, Agus Marambang, Alfi Yory Maryam Seyaski Fitria Melta, Defrian Minda Azhar Miranda Roulina Miranda Roulina T Monica, Levia Moyo, Kgomotso Muhammad Agung Muhammad Reza Ramlan Muhammad Taufik Muhammad Yerizam Muhammad Zulfahmi Muharram, Muharram Mustofa Mustofa Najwa, Cholida Nedia Sandika Nofi Yendri Sudiar Novarini, N Pakhrur Razi Prakoso, Dibyo Putra, Andhika Satria Putra, Asri Eka Putra, M. Rizky Adhitya Rahmadina, Nisa RD Kusumanto Reza Angraini Rhevy Liandari Rifa'i, Ahmad Imam Riri Jonuarti Robby Setiadi Robert Junaidi Robiansyah RR. Ella Evrita Hestiandari Rusdianasari Rusdianasari Rusdianasari Rusdianasari Salamah, Luthfia Samosir, Devina Sanchia Santosa, Tomi Apra sari, Desi Nurmala Sari, Mona Sari, Mona Berlian Septiana, Iriani Reka Shela Dilen Putri Siagian, Gunaria Sigit Kurniawan Sirajuddin Skunda Diliarosta Sofianora, Aulia Suaidi Ahadi Sundari, Okta Sutini Pujiastuti Lestari Sutini Pujiastuti Lestari Suyanta Suyanta Syakdani, Adi Tahdid . Thamrin Thamrin Tresna Dewi Wibby Aditya Putra Utama Widiartha, Wahyu Dewa Winiasri, Linda Wiranata, Muhammad Adithia WULANDARI, NILA Yenni Darvina Yerimadesi Yerimadesi Yulifarma, Rika Yulkifli Yulkifli Yusi, Syahirman Zakiyah Sri Rezeki Zikri, Ahmad Zulhendri Kamus Zulma, Degito Zulyusri Zulyusri