Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

3.265

P-Index

This Author published in this journals

All Journal Jurnal Rekayasa Proses International Journal of Renewable Energy Development Jurnal Sains dan Teknologi Journal of Engineering and Technological Sciences SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Rekayasa Proses INSIST (International Series on Interdisciplinary Research) Journal of Appropriate Technology for Community Services International Journal of Applied Sciences and Smart Technologies Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Reswara: Jurnal Pengabdian Kepada Masyarakat Metalurgi International Journal of Renewable Energy Development Jurnal Rekayasa Proses

Kevin Cleary Wanta

Department Of Chemical Engineering, Parahyangan Catholic University

Author-ID : 1141126

Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

Published : 34 Documents Claim Missing Document

Claim Missing Document

Articles

Title

SYNTHESIS AND CHARACTERIZATION OF NICKEL HYDROXIDE FROM EXTRACTION SOLUTION OF SPENT CATALYST Kevin Cleary Wanta; Felisha Hapsari Tanujaya; Federick Dwi Putra; Ratna Frida Susanti; Gelar Panji Gemilar; Widi Astuti; Himawan Tri Bayu Murti Petrus
Metalurgi Vol 35, No 3 (2020): Metalurgi Vol. 35 No. 3 Desember2020
Publisher : National Research and Innovation Agency (BRIN)

Nickel is an essential metal element and is applied in various sectors. One of the useful nickel–based derivatives products is nickel hydroxide [Ni(OH)2]. This compound is widely applied as raw material for electrodes of rechargeable batteries, capacitors, electrolyzers, and catalysts. This study focuses on the synthesis of Ni(OH)2 using the hydroxide precipitation method. A solution from the extraction process of spent catalysts was used as a precursor solution. After the precursor solution was obtained, the precipitation process was carried out at pH 10, where the operating temperature was varied at 30–60oC. NaOH, KOH, and MgO solutions were used as precipitating agents. The experimental results show that the Ni(OH)2 compounds were produced optimally at low temperatures, 30oC. It could be indicated from the lowest concentration of Ni2+ ions in the liquid phase that reached that temperature. The three precipitation agents also gave good results in the precipitation of Ni2+ ions, where almost all of the Ni2+ ions were precipitated from the liquid phase. The precipitated products were characterized using SEM, XRD, and XRF. The analysis results showed that the product was agglomerated and formless. The purity of the precipitates formed were 24.1 and 29% for the precipitating agents MgO and NaOH, respectively.

INCREASING OF METAL RECOVERY IN LEACHING PROCESS OF SPENT CATALYST AT LOW TEMPERATURE: THE ADDITION OF HYDROGEN PEROXIDE AND SODIUM CHLORIDE Kevin Cleary Wanta; Edward Yonathan Natapraja; Ratna Frida Susanti; Gelar Panji Gemilar; Widi Astuti; Himawan Tri Bayu Murti Petrus
Metalurgi Vol 36, No 2 (2021): Metalurgi Vol. 36 No. 2 Agustus 2021
Publisher : National Research and Innovation Agency (BRIN)

One of the factors that affect the leaching process of a mineral source is the mineral characteristics of the raw materials. Not all mineral phases can be leached directly and completely. Thus, some minerals require special treatment so that the leaching process can take place optimally. This study will focus on studying the effect of additive compounds addition, i.e. hydrogen peroxide and sodium chloride, in the leaching process of spent catalyst using a sulfuric acid solution. The leaching process was carried out at a concentration of 1 M sulfuric acid solution for 240 minutes at room temperature. The hydrogen peroxide concentration was varied at 0–9%v/v, while the sodium chloride concentration was varied at 0–0.8 mol/L. The experimental results showed that the two additive compounds were able to increase nickel recovery significantly. The highest nickel recovery of 95.08% was achieved when hydrogen peroxide was used at 9%v/v. The nickel recovery is 3.5 times higher than without the addition of hydrogen peroxide. Meanwhile, sodium chloride concentration of 0.8 mol/L was able to provide the highest nickel recovery of 50.38% or an increase of 1.9 times compared to without the addition of sodium chloride.

SYNTHESIS AND CHARACTERISTIC OF NANOSILICA FROM GEOTHERMAL SLUDGE: EFFECT OF SURFACTANT Adiatama, Aufa Rai; Susanti, Ratna Frida; Astuti, Widi; Petrus, Himawan Tri Bayu Murti; Wanta, Kevin Cleary
Metalurgi Vol 37, No 2 (2022): Metalurgi Vol. 37 No. 2 Agustus 2022
Publisher : National Research and Innovation Agency (BRIN)

In the synthesis of nanoparticles, the phenomenon of agglomeration is an undesirable condition because the particles formed can be larger. The use of surfactants can prevent the occurrence of this phenomenon. In this study, the use of surfactants was studied in the synthesis of nanosilica from geothermal sludge. The method applied in the synthesis of nanosilica is the sol-gel method. A 1 M sodium hydroxide (NaOH) solution was used to prepare the sol phase, while the gel phase was prepared at pH 5 using a 1.5 M hydrochloric acid (HCl) solution. The surfactants used were alkyl benzene sulfonate (ABS), cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and polyvinylpyrrolidone (PVP). The surfactant added to the precursor solution was at the critical micelle concentration (CMC), where the CMC values for each surfactant were 0.15, 0.05, 0.50, and 1.00 wt% for ABS, CTAB, SDS, and PVP, respectively. The experimental results showed that the synthesis of nanosilica without surfactant could produce the product with a purity of 98.03%. Even though the purity is already high, the resulting product experiences agglomeration and surfactants were needed to minimize the occurrence of agglomeration in the product. The surfactant that gives the best product quality is PVP, where the particle size is in the range of 2.01–3.65 nm. However, the product produced with this PVP has a low purity, 56.67%. It is because the sodium chloride (NaCl) is trapped in the surfactant template.

Co-Authors Achmad Noerkhaerin Putra Adiatama, Aufa Rai Agus Prasetya Agus Prasetya Anastasia Prima Kristijarti Anastasia Prima Kristijarti Angela Justina Kumalaputri Angelia, Annasthasya Milleni Arif Budianto Cuaca Arry Miryanti Bahri, Elsha Pamida Ceicalia Tesavrita Cherish Rikardo Dewi, Jilda Sofiana Dwiki Eka Putra Edward Yonathan Natapraja Elsha Pamida Bahri Federick Dwi Putra Federick Dwi Putra Federick Dwi Putra Felisha Hapsari Tanujaya Felisha Hapsari Tanujaya Felisha Hapsari Tanujaya Fynn, Vincentius Felix Gelar Panji Gemilar Gelar Panji Gemilar Gelar Panji Gemilar Gelar Panji Gemilar Gemilar, Gelar Panji Giovanni Angelina Herry Santoso Himawan T. B. M. Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Indra Perdana Indra Perdana Indra Perdana Indra Perdana Ivanna Crecentia Narulita Simanungkalit Jonas Kristanto Judy Retti Witono Julianto, Shelvia Kristanto, Jonas Loren Pratiwi Ramadhany, Putri Ratna Frida Susanti Shinta Virdhian Shinta Virdhian Simanungkalit, Ivanna Crecentia Narulita Slamet Sumardi, Slamet Stephen Lim Stephen Lim Tabita Kristina Mora Ayu Panggabean Tjuaja, Rudy Vincent Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Y.I.P. Arry Miryanti Y.I.P. Arry Miryanti Yansen Hartanto Yeremias Juma Yuda, Aulia Pertiwi Tri Yuniati, Mutia Dewi

Title Search

Found 3 Documents Search Journal : Metalurgi

Abstract

Abstract

Abstract

Title

Found 3 Documents
Search
Journal : Metalurgi