Garuda - Garba Rujukan Digital

p-Index From 2019 - 2024

2.56

P-Index

This Author published in this journals

All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Sains Materi Indonesia Agrointek Teknika: Jurnal Sains dan Teknologi ROTOR: JURNAL ILMIAH TEKNIK MESIN Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Journal Of Chemical Process Engineering (JCPE) Jurnal Rekayasa Material, Manufaktur & Energi Metalurgi Teknomekanik Metalurgi Recent in Engineering Science and Technology

Sudarsono, Johny Wahyuadi

Departemen Teknik Metalurgi Dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424

Author-ID : 5301359

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

Published : 19 Documents Claim Missing Document

Claim Missing Document

Articles

1 2

Quantitative Risk-Based Inspection on Gas Riser Pipelines at Offshore Facilities Mhd. Ibkar Yusran Asfar; Johny Wahyuadi Soedarsono; Arie Wijaya; Taufik Aditiyawarman; Dony Soelistiyono; Romal Ramadhan
Teknomekanik Vol 4 No 2 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Numerous pipeline failures have occurred due to the drastic increase in oil and gas product distribution pipelines over the last three decades. Corrosion is a significant factor in the failure of offshore gas pipelines. It is necessary to maintain the integrity of the offshore transmission system, one of which is the riser, for the product to be adequately distributed. The purpose of this study is to ensure the riser's reliability by conducting a risk assessment of the probability and consequences of equipment failure, mitigating the impact of failure risk, and developing a more optimal inspection plan. The API 5L Grade X60 gas riser pipe is the subject of this study. The quantitative Risk-Based Inspection (RBI) technique was used in 2016 following the API 581 standard. This quantitative approach is founded on a numerical value model constructed using validated operational data and inspection results. The risk assessment indicates that the gas riser pipelines will have a high-risk level (5D) for the splash zone segment and a medium-risk level (2D) for the above-and below-water segments. The recommended inspection plan for the gas riser pipeline is one year after the risk-based inspection assessment.

The Risk Identification On 3" GL BO3-52520 Process Pipelines Using a Risk-Based Inspection Method Angga Pratama Putra; Johny Wahyuadi Soedarsono; Azizah Intan Pangesty; Muhammad Ibkar Yusran asfar; Aprizal Aprizal; Romal Ramadhan
Teknomekanik Vol 5 No 1 (2022): Regular Issue
Publisher : Universitas Negeri Padang

The oil and gas industry can contribute significantly to sustainable development by mitigating negative environmental impacts, such as equipment failure. Numerous pipeline failures have occurred due to the dramatic expansion of the oil and gas product distribution pipeline network, which is a significant factor in the offshore gas pipeline network's failure. In general, compared to other equipment types in the industry, planning inspections presents more challenges. Due to a lack of jurisdictional requirements regarding inspection intervals and piping methods. This research aims to ensure the reliability by conducting a risk assessment of the likelihood and consequences of equipment failure, mitigating the impact of that risk, and developing a more optimal inspection plan. This study is focused on API Class 5L Pipe 3" GL BO3-52520. The Routine Inspection Technique (RBI) was implemented in 2016 following the API 581 standard. This semi-quantitative approach is built based on operational data and validated inspection results. According to the risk assessment, the pipeline will have a Medium risk level, with metal losses occurring in each segment. Four years after the risk-based inspection assessment, the recommended inspection plan for gas pipelines is four years.

Material selection for raw gas pipeline at SBR#2 gas field Rado Riady; Johny Wahyuadi Soedarsono; Rini Riastuti; Iman Adipurnama
Teknomekanik Vol 5 No 2 (2022): Regular Issue
Publisher : Universitas Negeri Padang

In engineering design, material selection is the process of choosing the best material for a specific process via a systematic material selection approach. This article described the material selection process for SBR#2 pipeline, which will be installed to flow raw gas from SBR#2 field to the nearest tie-in point. The material selection process starts with design requirement analysis to generate primary function and objectives, including its constraints, determine primary criteria to be evaluated, screen materials candidates based on criteria evaluation, and select the most suitable materials based on very specific requirements. The criteria were evaluated by performing value engineering with the performance criteria matrix tool. Materials selection, in this case, was determined by two main criteria: corrosion resistance and construction ability. Corrosion resistance was evaluated semi-quantitatively by applying NORSOK M-506 2005 spreadsheet, and construction ability were evaluated qualitatively based on field experience. Solid Corrosion Resistance Alloy (CRA)-Stainless Steel 316L pipe is the most suitable for this case.

Studi Pengaruh Titik Penambahan Sodium Isobutyl Xanthate (SIBX) dan Kecepatan Impeller pada Performa Flotasi Mineral Tembaga Anjar Oktikawati; Cahyo Ady Nugraha; Johny Wahyuadi Soedarsono
Rekayasa Material, Manufaktur dan Energi Vol 6, No 1: Maret 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i1.12650

Evaluation of the use of the SIBX addition point and energy consumption in a flotation machine is an optimization effort to increase recovery in a valuable mineral separation process. The purpose of this study was to maximize the use of reagents and energy consumption in flotation machines by looking for the effect of the SIBX addition point and impeller speed variations on copper recovery. In the experiments, the authors vary the impeller speed and the SIBX addition points. The impeller speed is varied into five different speeds. While the SIBX addition point into four different points. From the variation of the experiment, the test must be done within 20 flotation kinetics. Those tests were performed for 8 minutes and will generate 4 concentrates and tailings. From this information, a graph of the relationship between recovery and time is obtained, and it can be seen that the point of adding SIBX and impeller speed is to produce optimal recovery values. From the available tailings and feed, an analysis of particle size and distribution is also carried out to check the effectiveness of changing the impeller speed pattern to provide kinetic energy for particles of various sizes to collide with air bubbles and increase the probability of collection of valuable minerals, so that high recovery is obtained in various areas. particle size. Of all the speed variations used in the impeller, the best kinetic recovery comes from the addition of SBX in the 0 min, 2 min, and 4 min. While the worst comes from the addition in the 6 min. Copper kinetic recovery is only affected by the nature and amount of hydrophobic particles but is not affected by impeller speed. Copper recovery at each end of the experiment showed the same value which is an average of about 94%.

The Effect of Roasting Prior to The Leaching Process of Alkalinized Ferronickel Slag Followed by Precipitation Process Wahyu Mayangsari; Agus Budi Prasetyo; Eni Febriana; Januar Irawan; Rudi Subagja; Florentinus Firdiyono; Johny Wahyuadi Soedarsono
Metalurgi Vol 36, No 2 (2021): Metalurgi Vol. 36 No. 2 Agustus 2021
Publisher : National Research and Innovation Agency (BRIN)

Terak feronikel dihasilkan sebagai produk samping dari produksi feronikel. terak feronikel mempunyai potensi sebagai bahan baku beberapa komponen berharga karena komposisinya melalui proses bertahap. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh dari proses pemanggangan campuran terak feronikel dan Na2CO3 sebelum leaching air panas dan presipitasi untuk menghasilkan endapan silika. Proses pemanggangan terak feronikel dengan penambahan Na2CO3 telah dilakukan untuk pembentukan natrium silikat. Kemudian dilarutkan melalui proses pelindian menggunakan air panas 90 ° C selama 120 menit. Endapan silika didapatkan dengan proses presipitasi sodium silikat terlarut diikuti dengan pemeraman selama tiga hari. Berdasarkan hasilnya, pemanggangan menyebabkan perubahan komposisi yang mempengaruhi persen pelindian dan perolehan silika. Reaksi terjadi dari permukaan ke inti yang dibuktikan dengan pengecilan ukuran residu pelindian dari RAF nya. Natrium silikat dalam bentuk Na4SiO4 diketahui terlarut Ketika pelindian air dilakukan. Pengendapan dan pemeraman larutan natrium silikat telah menghasilkan endapan silika dengan ukuran partikel lebih dari 100 mm. pemanggangan pada 1000 ° C selama 240 menit menghasilkan perolehan silika tertinggi.

Ekstraksi Litium dari β – Spodumen Hasil Dekomposisi Batuan Sekismika Indonesia Menggunakan Aditif Natrium Sulfat [Lithium Extraction from β-Spodumene the Decomposition Product of Schist Mica Indonesia Using Sodium Sulphate as Additive] Nadia Chrisayu Natasha; Latifa Hanum Lalasari; Miftakhur Rohmah; Johny Wahyuadi Sudarsono
Metalurgi Vol 33, No 2 (2018): Metalurgi Vol. 33 No. 2 Agustus 2018
Publisher : National Research and Innovation Agency (BRIN)

Spodumene is one of minerals that present in hard rock as lithium resources. Mineral for lithium resources in nature is α-phase spodumene. Requirement of lithium extraction from spodumene by leaching is the presence of β-form phase in ore because it has a porosity that makes it more reactive than α-form. Formation of β-phase spodumene was obtained from schist mica Kebumen, Center Java, Indonesia by roasting method using sodium sulfate at 650, 700, 750 and 800 oC for 20, 40 and 60 minutes. Leaching was done to determine the phase effect on lithium extraction percentage. The variations of solid and liquid ratio on this leaching are 1 : 15, 1 : 10, 1 : 5, 1 : 2 and 1 : 1 (g/mL). Leaching was done using aquadest for 1 h. STA (simultaneous thermal analysis) was used to determine reaction temperature between schist mica and sodium sulfate by thermal treatment. XRD (x-ray diffraction) and SEM (scanning electron microscopy) were used to examine the presence of spodumene phase, morphology and particle size. While the composition of schist mica was determined by ICP (inductively coupled plasma). In schist mica from Kebumen, Center Java, Indonesia indicates that spodumene exist in it. β-phase spodumene started to form at 700 oC for 20 minutes and it phase changed at 750 oC for 40 minutes become sanidine (AlLiO8Si3). Optimum value of extraction percentage from this investigation is 70.6% at 700 oC for 40 minutes. AbstrakSpodumen merupakan salah satu mineral yang terkandung di dalam batuan sebagai sumber litium. Mineral bahan baku litium ditemukan di alam dalam bentuk α – spodumen. Syarat utama dalam melakukan ekstraksi litium dari spodumen dengan metode leaching adalah fasa β – spodumen. Hal tersebut dapat terjadi karena fasa tersebut mempunyai poros yang membuatnya menjadi lebih reaktif jika dibandingkan dengan fasa α – spodumen. Pembentukan fasa β – spodumen diperoleh dari batuan sekismika Indonesia dengan metode roasting menggunakan natrium sulfat sebagai aditif pada 650, 700, 750 dan 850 ºC selama 20, 40 dan 60 menit. Proses leaching dilakukan untuk mengetahui pengaruh fasa yang terbentuk terhadap persen ekstraksi litium. Variasi perbandingan solid dan liquid pada proses leaching yaitu 1 : 15, 1 : 10, 1 : 5, 1 : 2 dan 1 : 1. Proses leaching dilakukan menggunakan aquadest selama 1 jam pada temperatur kamar. Analisis Simultaneous Thermal Analysis (STA) digunakan untuk menentukan temperatur reaksi antara sekismika dan natrium sulfat pada saat proses roasting. Analisis X – ray diffraction (XRD) dan Scanning Electron Microscope (SEM) dilakukan untuk analisis secara fisik dalam mengetahui perubahan fasa yang terbentuk, morfologi dan mapping. Sedangkan komposisi dari sekismika ditentukan dengan Inductively Coupled Plasma (ICP). Di dalam batuan sekismika, Kebumen Indonesia mengindikasikan adanya kandungan mineral spodumen. Fasa β – spodumen mulai terbentuk pada temperatur 700 ºC dan waktu roasting 20 menit namun fasa tersebut berubah pada 750 ºC dan waktu roasting 40 menit menjadi sanidine (AlLiO8Si3). Persen ekstraksi optimum litium yang diperoleh adalah 70,6% pada 700 ºC dan waktu roasting 40 menit.

PENGKAYAAN UNSUR YTTRIUM DAN CERIUM PADA TERAK TIMAH BANGKA: ANALISIS TERMODINAMIKA Sulaksana Permana; Debby Rachel; Agus Budi Prasetyo; Rafdi Abdul Majid; Wahyu Kartika; Iwan Susanto; Johny Wahyuadi M
Metalurgi Vol 35, No 2 (2020): Metalurgi Vol. 35 No. 2 Agustus 2020
Publisher : National Research and Innovation Agency (BRIN)

Beberapa negara melakukan penelitian untuk mendapatkan sumber unsur tanah jarang (UTJ) dikarenakan dominasi suplai UTJ oleh negara China. Beberapa penelitian sebelumnya menunjukkan adanya sumber UTJ dari proses penambangan dan pemurnian timah di kepulauan Bangka Belitung. Pada penelitian ini terak timah Bangka (TTB) dilakukan serangkaian kondisi proses untuk mendapatkan hasil pengkayaan yttrium dan cerium yang optimal. Proses yang dilakukan adalah dengan melakukan pemanggangan TTB pada suhu 900⁰C, pelindian dengan NaOH, pelindian dengan HNO3 dan terakhir pelindian dengan H3PO4 dengan variasi konsentrasi. Hasil yang didapatkan adalah kadar optimal cerium 4,39 % setelah kondisi proses pelindian NaOH dan kadar yttrium mengalami peningkatan terus pada seluruh kondisi proses serta didapatkan kadar optimal 1,35 % setelah dilakukan pelindian dengan HNO3 2M dan H3PO4 1,5 M.

Effect of Slope Chute Angle of HAP Magnetic Separator to the Acquisition of Nickel Matte from Undersized Product Resulted by Pierce Smith Converter Machine Nurhayati Indah Ciptasari; Egidius Arya Parande; Johny Wahyuadi Soedarsono; Agus Budi Prasetyo; Wahyu Mayangsari; Reza Miftahul Ulum; Ahmad Maksum
Recent in Engineering Science and Technology Vol. 1 No. 03 (2023): RiESTech Volume 01 No. 03 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i03.18

The prototype of a magnetic separator was initiated and manufactured for handling undersized products of Pierce Smith Converter which has been channeled to a temporary shelter called a matte pond. It was dredged three to four times a year and it’s costly. This expenditure can be minimized by the manufacture of magnetic separators that are used to attract undersized nickel products. The manufacture of this prototype uses a scale of 1:20.000 for the volume of water and nickel matte, while for chute and magnetic drums with a scale of 1:4 from the conditions in the field. This research aims to determine whether magnetic separators are relevant for installation in the nickel processing industry, with the slope angle of the chute and magnetic power as the main parameters. Thus the matte pond can be minimized and undersized products can be directly processed and distributed to consumers. The material used in the manufacture of this prototype is aluminum sheet 1/16 which is rolled for magnetic drums, aluminum sheet 1/8 in for chute, copper wire 0.5 mm and mild steel, lathe for rods and axis, and bending for magnetic holders. The result of this magnetic separator prototype is 24.48% nickel can be attracted.

Kajian Kombinasi Ekstrak Daun Physalis angulata dan Daun Cassia angustifolia dengan Rasio 50:50 sebagai Green Inhibitor untuk API 5L dalam Larutan HCl 1M: Kajian Green Inhibitor tipe campuran untuk API 5L dalam Larutan HCl Triska Adelia Ni Luh; Khalisha Rizqi Olga Pramono; Johny Wahyuadi Soedarsono; M. Yudi M. Solihin
Recent in Engineering Science and Technology Vol. 2 No. 03 (2024): RiESTech Volume 02 No. 03 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i03.66

The effect of combination of Physalis angulata leaf and Cassia angustifolia leaf extract as green inhibitor with a 50:50 ratio for API 5L steel was investigated. This experiment was carried in 1M HCl solution by using different concentrations as variables which is 10 ml, 30 ml, and 50 ml inhibitor extracts. Evaluation of this experiment was performed using potentiodynamic polarization and EIS. The antioxidant compound was investigated using FTIR and was found to be flavonoid. It was found that the capability of the inhibitor to inhibit the steel surface from the environment increases with increasing concentration, which 50 ml concentration is found to have the best efficiency of all concentrations. Combination of Physalis angulata leaf and Cassia angustifolia leaf extract is identified as mixed-type inhibitor with predominant cathodic effectiveness. The adsorption of this inhibitor on the steel surface was predominantly through physisorption and obeyed Langmuir adsorption isotherm.

Co-Authors Agus Budi Prasetyo Agus Budi Prasetyo Agus Budi Prasetyo Ahmad Maksum Aldi Putra Laksana Andon Insani Angga Pratama Putra Anjar Oktikawati Aprizal Aprizal Arie Wijaya Arie Wijaya Ariyo Suharyanto Azizah Intan Pangesty Cahyo Ady Nugraha D Darnengsih Debby Rachel Dony Soelistiyono Eddy Siradj Egidius Arya Parande Eni Febriana Eriyatno . Ersina Rakhma Florentinus Firdiyono Hadi Suwarno Hendrastuti Hendrastuti Iman Adipurnama Iwan Susanto Iwan Susanto Januar Irawan Kautsar Muwahhid Kautsar Muwahhid Khalisha Rizqi Olga Pramono Kurnia Trinopiawan Lalasari, Latifa Hanum Latifa Hanum Lalasari Latifa Hanum Lalasari M. Yudi M. Solihin Meika Syahbana Rusli Mhd. Ibkar Yusran Asfar Mhd. Ibkar Yusran Asfar Miftakhur Rohmah Miftakhur Rohmah Miftakhur Rohmah, Miftakhur Muhammad Ibkar Yusran asfar Munira Munira Mustafiah Mustafiah Nadia Chrisayu Natasha Natasha, Nadia Chrisayu Nurhayati Indah Ciptasari Rado Riady Rafdi Abdul Majid Rafdi Abdul Majid Reza Miftahul Ulum Rini Riastuti Rini Riastuti, Rini Romal Ramadhan Romal Ramadhan Rudi Subagja Sulaksana Permana Sulaksana Permana Sulaksana Permana Taufik Aditiyawarman Tri Partuti Triska Adelia Ni Luh Venny Nur Avifa Wahyu Kartika Wahyu Kartika Wahyu Mayangsari Wahyu Mayangsari Wisnu Ari Adi Yarianto Sugeng Budi Susilo Yayat Iman Supriyatna

Title

Found 19 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 19 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 19 Documents
Search