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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Indonesian Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) Equilibrium Journal of Chemical Engineering
Cornelius Satria Yudha
Program Studi D3 Teknik Kimia, Sekolah Vokasi, Universitas Sebelas Maret
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology

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Regeneration of Spent Nickel Catalyst via Hydrometallurgical Method Fransisca Poppy Amelia; Erica Puspita Sari; Hafiz Norman; Muhammad Alhadilansa Salsabil; Cornelius Satria Yudha
Equilibrium Journal of Chemical Engineering Vol 7, No 2 (2023): Volume 7, No 2 December 2023-- Online First
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i2.74492

Abstract

Abstract. Nickel Catalyst is one of the common catalysts found in chemical industries. However, this catalyst has a limited lifetime indicated by having performance or activity drop so it is potentially become dangerous waste if the handling is not proper. The spent nickel catalyst needs to be processed to recover and avoid pollution towards the environment. The Hydrometallurgy method is a proper method to process nickel catalyst waste. The purpose of this research is to investigate the characteristic of a regenerated nickel catalyst when it is treated with HCl and H2SO4 as the lixiviant. In this research, the spent nickel catalyst was treated with HCl and H2SO4 in the presence of 2% H2O2 reductant under room conditions and mixing rate at 200 rpm for 30 minutes of reaction. The leaching filtrate was precipitated using NaOH solution while the formed precipitate was heated at 800 °C for 3 hours. The regenerated catalyst was characterized using FTIR and SEM-EDX. The SEM images showed regenerated catalyst prepared using the HCl solution has a different morphology compared to the one using the H2SO4 solution. Based on FTIR analysis, both samples exhibit Ni-O and C-O groups. Based on elemental analysis, the highest nickel concentration was obtained by using HCl with a Ni content of 25.98%w/w, compare to sulfuric acid (H2SO4) with a Ni content of 10.94%w/w. The Ni content can be improved by the addition of a washing step after the sintering process.Keywords:Hydrometallurgy Nickel Catalyst, Waste, Leaching, Sintering
The Conversion of Sorghum (Sorghum bicolor (L.) Moench) Stem Waste into Activated Carbon by the Pyrolysis Method Using ZnCl2 Activator Natasya Dian Andini; Yuliana Prasetiyani; Fisafillah Al Mumtahinah; Cornelius Satria Yudha; Bintari Astika
Equilibrium Journal of Chemical Engineering Vol 7, No 2 (2023): Volume 7, No 2 December 2023-- Online First
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i2.74478

Abstract

Abstract. The use of activated carbon in Indonesia is expanding along with the increasing demand for activated carbon. Therefore, it is necessary to continue to search for raw materials and methods for producing activated carbon to produce high-quality activated carbon. Sorghum stalk (Sorghum bicolor (L.) Moench) is used as a new precursor for the formation of activated carbon by utilizing a ZnCl2 activator followed by pyrolysis in a furnace with a temperature of 800°C. This study aims to determine the effect of drying and the concentration of activator agents on activated carbon production. The ZnCl2 activator concentrations used were 15% and 30%. The results showed that the activated carbon obtained through the withdrawal process with a ZnCl2 concentration of 30% had the highest carbon content, namely 100%. Test results with FTIR spectroscopy showed that the activated carbon samples had groups (C-H), (O-H), (C≡C), (C=O), (C=C), and (C-O). In addition, the SEM test results showed that the surface of the activated carbon formed had many pores. With the presence of activated carbon from sorghum stem waste, it is hoped that this product can reduce the contaminants contained in wastewater.Keywords: Activation, Activated Carbon, Waste, Pyrolysis, Sorghum, ZnCl2
Co-Authors Adhitya Dharmawan Adrian Nur Agus Purwanto Agus Purwanto Anisa Raditya Nurohmah Ari Diana Susanti Atika Aulia Novita Sari Ayub Mahmudi Bintari Astika Diajeng Putri Suciutami Dona Kurniawati Dewi Endah Retno Dyartanti Enni Apriliyani Erica Puspita Sari Esa Nur Shohih Firman Asto Putro Firstandika, Leader Fisafillah Al Mumtahinah Fransisca Poppy Amelia Hafiz Norman Hanida Nilasary Hartoto Nursukatmo Hendri Widiyandari Himmah Sekar Eka Ayu Gustiana Inayati Inayati Linggar Tungga Gupita Luthfi Mufidatul Hasanah Luthfi Mufidatul Hasanah Luthfi Mufidatul Hasanah Meidiana Arinawati Miftakhul Hakam Muhammad Alhadilansa Salsabil Muhammad Iqbal Al Fuady Natasya Dian Andini Paryanto Paryanto Paryanto Paryanto Purwanto, Agus Shofirul Sholikhatun Nisa Soraya Ulfa Muzayanha Soraya Ulfa Muzayanha Soraya Ulfa Muzayanha Syahrul Aji Jayani Tika Paramitha Vira Mawardha Putri Vita Febriyanti Windhu Griyasti Suci Windhu Griyasti Suci Wusana Agung Wibowo, Wusana Agung Yuliana Prasetiyani