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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) INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Rekayasa Material, Manufaktur & Energi Metalurgi Teknomekanik Journal of Materials Exploration and Findings Metalurgi Recent in Engineering Science and Technology Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Johny Wahyuadi Soedarsono
Departemen Teknik Metalurgi Dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Journal : Recent in Engineering Science and Technology

 1 
Catalytic Graphitization of Biomass as a Potential Method Produce Graphite In The Future : A Review Nuriskasari, Isnanda; Zulfia Syahrial, Anne; Wahyuadi M Soedarsono, Johny
Recent in Engineering Science and Technology Vol. 1 No. 02 (2023): RiESTech Volume 01 No. 02 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i02.17

Abstract

The traditional graphitization process involves the use of non-renewable carbon sources and high temperatures, which are time-consuming and expensive. Biomass has been proposed as an alternative renewable source of carbon, which can be graphitized at lower temperatures using transition metal catalysts. The article highlights successful research on graphitization of various biomass carbon sources, such as coconut coir, whey protein, pine wood sawdust, mangosteen peel, miscanthus grass, and palm kernel shell waste, using metals as a catalyst. The graphitization process using catalysts derived from transition metals has been shown to reduce the graphitization temperature, shorten the graphitization time and improve the physicochemical properties of the resulting graphite material.
Effect of Slope Chute Angle of HAP Magnetic Separator to the Acquisition of Nickel Matte from Undersized Product Resulted by Pierce Smith Converter Machine Indah Ciptasari, Nurhayati; Arya Parande, Egidius; Wahyuadi Soedarsono, Johny; Budi Prasetyo, Agus; Mayangsari, Wahyu; Miftahul Ulum, Reza; Maksum, Ahmad
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

Abstract

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 Ni Luh, Triska Adelia; Pramono, Khalisha Rizqi Olga; Soedarsono, Johny Wahyuadi; Solihin, M. Yudi M.
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

Abstract

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.
Effects of Red Rosela Tea (Hibiscus sabdariffa) as An Organic Inhibitor for Low Carbon Steel in An Environment of Sodium Chloride 3,5% Rahmaulita, Giafin Bibsy; Soedarsono, Johny Wahyuadi Mudaryoto
Recent in Engineering Science and Technology Vol. 3 No. 04 (2025): RiESTech Volume 03 No. 04 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i04.119

Abstract

Corrosion is an unavoidable phenomenon that is commonly observed in everyday life, particularly in infrastructure and tools constructed from low carbon steel. The corrosion of low carbon steel in chloride-rich environments presents a critical issue across numerous industrial sectors. One widely adopted method for mitigating corrosion involves the application of corrosion inhibitors, chemical substances that even in small concentrations, can significantly suppress the rate of metal degradation in corrosive environments. This research examines the potential of red roselle extract (Hibiscus sabdariffa) as a green corrosion inhibitor for low carbon steel in a 3.5% sodium chloride solution. The corrosion inhibition performance will be evaluated based on weight loss measurements over varying exposure periods of 3, 6, 9, and 12 days. Red roselle tea concentration of 10 g/L will be utilized, supplemented with an additional 2 mL of liquid inhibitor. The results of this study indicate that the maximum corrosion inhibition efficiency reaches 16% after 9 days of immersion, while the lowest efficiency is observed at 8% after 3 days. pH measurements and corrosion potential analysis suggest that red roselle tea contributes to reducing the corrosion rate by forming a protective layer on the surface of low carbon steel.
Study of the Effect of Volume of Moringa Leaves and Purple Sweet Potato Extracts as a Green Corrosion Inhibitor on the Corrosion of API 5L Steel Metals in 0.2 M HCl Environments Kezia; Pratesa, Yudha; Pertama, Tio Angger; Soedarsono, Johny Wahyuadi
Recent in Engineering Science and Technology Vol. 3 No. 04 (2025): RiESTech Volume 03 No. 04 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i04.120

Abstract

This study aimed to investigate the corrosion inhibition mechanism of moringa leaves extract (Moringa oleifera) and purple sweet potato extract (Ipomoea batatas) extract as environmentally friendly inhibitors for low carbon API 5L steel in a 0.2 M HCl solution. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests were conducted with varying concentrations and combinations of the two inhibitors to evaluate their corrosion inhibition performance. The results indicated that both inhibitors individually function effectively as green corrosion inhibitors. However, their combination did not offer adequate protection for API 5L steel in a 0.2 M HCl environment. FTIR analysis of the inhibitors confirmed the presence of flavonoid compounds in both extracts. Potentiodynamic polarization tests showed that increasing the concentration of moringa leaves extract resulted in a decrease in the corrosion rate and an increase in %IE, with the highest efficiency reaching 73.08%. Similarly, an increase in the volume of purple sweet potato extract also resulted in a reduced corrosion rate, with a maximum inhibition efficiency of 65.31%. However, the combination of both inhibitors led to an increase in the corrosion rate. The results of the EIS test demonstrated that both inhibitors protect the metal by forming a protective film layer on its surface. The adsorption behavior of the inhibitors corresponds to a physical adsorption process and aligns with the Langmuir adsorption isotherm model.
Co-Authors Adelia, Ni Luh Triska Adipurnama, Iman Aditiyawarman, Taufik Agus Budi Prasetyo Agus Budi Prasetyo Ahmad Maksum Andon Insani Angga Pratama Putra, Angga Pratama Anjar Oktikawati Anne Zulfia Aprizal Aprizal Arif Arif Arif, Chandra Ariyani, Ira Ariyo Suharyanto Arya Parande, Egidius Asfar, Mhd. Ibkar Yusran Astini, Vita Avifa, Venny Nur Azizah Intan Pangesty Badrul Munir, Badrul Bambang Suharno Budi Prasetyo, Agus Darnengsih, Darnengsih Debby Rachel Eddy S Siradj Eni Febriana Eriyatno . Ersina Rakhma Fachry Abda El Rahman Florentinus Firdiyono Hadi Suwarno Haekal, Teuku Ahmad Haidir, Yuki Hasriyanti Hasriyanti Hendrastuti Hendrastuti Hernowo, Widi Indah Ciptasari, Nurhayati Isnanda Nuriskasari Iwan Susanto Januar Irawan Kautsar Muwahhid Kautsar Muwahhid Kezia Kurnia Trinopiawan Kurnia Trinopiawan Laksana, Aldi Putra Lalasari, Latifa Hanum Latifa Hanum Lalasari Latifa Hanum Lalasari Mahendra, Mirza Meika Syahbana Rusli Meirawati, Selvia Mhd. Ibkar Yusran Asfar Miftahul Ulum, Reza Miftakhur Rohmah Miftakhur Rohmah, Miftakhur Munira Munira Mustafiah Mustafiah Nadia Chrisayu Natasha Natasha, Nadia Chrisayu Nengsih, Sulistia Ni Luh, Triska Adelia Nugraha, Cahyo Ady Nugroho, Firman A. Padmodwiputra, Rendhatya Permana, Sulaksana Pertama, Tio Angger Pramono, Khalisha Rizqi Olga Purnawarman, Faisal Dwiyana Putra, Budhi Putra, Ivan Fitrian Rafdi Abdul Majid Rafdi Abdul Majid Rahmaulita, Giafin Bibsy Rakhma, Ersina Ramadhan, Romal Riady, Rado Rianti Dewi Sulamet-Ariobimo, Rianti Dewi Rini Riastuti, Rini Rudi Subagja Satria, Bambang Eka Sholihin, Muhammad Yudi Masduky Soelistiyono, Dony Solihin, M. Yudi M. Suarthana, Eka Juni Sukirna, Iwan Sulaksana Permana Sulaksana Permana Sulaksana Permana Supriyatna, Yayat Iman Tri Partuti Venny Nur Avifa Vika Rizkia Wahyu Kartika Wahyu Kartika Wahyu Mayangsari Wahyu Mayangsari Widianto, Shilla Rizqi Wijaya, Arie Wisnu Ari Adi Yarianto Sugeng Budi Susilo Yarianto Sugeng Budi Susilo, Yarianto Sugeng Budi Yayat Iman Supriyatna Yudha Pratesa Yusran asfar, Muhammad Ibkar Zulfia Syahrial, Anne