Article Per Year (5 Year)
p-Index From 2020 - 2025
0.61
P-Index
This Author published in this journals
All Journal Jurnal Litbang Industri Indonesian Journal of Chemistry International Journal of Engineering, Science and Information Technology Journal of Mechanical Engineering Jurnal Litbang Industri
Yunardi, Y
Department Of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Effects of Fe2+ and Fe3+ ratio impregnated onto local commercial activated carbon coconut shell powder on the dye removal efficiency Machdar, Izarul; Faradillasari, Cut; Khair, Nurul Atika; Asnawi, Teku Muhammad; BC, Alfiansyah Yulianur; Yunardi, Y
Jurnal Litbang Industri Vol 8, No 1 (2018)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.692 KB) | DOI: 10.24960/jli.v8i1.3720.11-16

Abstract

The present study reports the performance of magnetic activated carbon impregnated with Fe2+ and Fe3+ on the removal of dye from a simulated wastewater. The magnetic activated carbon (MAC) as a magnetic absorbent was prepared by co-precipitation method and followed by impregnation process. The activated carbon (AC) was supplied from a local commercial activated carbon coconut shell powder. The objective of this study was to investigate the effects of Fe2+ and Fe3+ on the quality product of MAC for dye (methylene blue) adsorption. The molar ratios of Fe2+ and Fe3+ used during the preparation of the MAC were 1:1; 1:2, and 2:1. The MAC products were characterized by using scanning electron microscope (SEM), energy dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FT-IR) analysis techniques. The results confirmed that the concentration of magnetic particles (Fe3O4) on the MAC surface increased following the impregnation process. However, this results lowering adsorption properties of the MAC adsorbents, which subsequently affected the dye removal performance. The ratio of Fe2+:Fe3+ on the MAC preparation did not significantly change the MAC absorbent on the dye removal efficiency. Additionally, MAC derived from local AC possess a prospect as a sustainable alternative for dye pollutant adsorbent.AbstrakPenelitian ini melaporkan kinerja karbon aktif bersifat magnet yang di impregnasi dengan Fe2+dan  Fe3+ dalam penyerapan zat warna dari air limbah buatan. Karbon aktif bersifat magnet (MAC) dibuat melalui metode co-presipitasi dan diikuti dengan proses impregnasi. Material karbon aktif (AC) dibuat dari tempurung kelapa yang diperoleh dari pasar lokal. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh ratio dari Fe2+ and Fe3+ terhadap kualitas produk MAC yang digunakan nantinya di dalam proses penyerapan zat warna (metilen biru). Rasio molar dari Fe2+ and Fe3+ yang digunakan di dalam penelitian ini untuk menghasilkan MAC adalah 1:1; 1:2, dan 2:1. Produk MAC yang dihasilkan dipelajari karakteristiknya melalui scanning electron microscope (SEM), energy dispersive X-ray (EDX), dan Fourier transform infrared spectroscopy (FT-IR). Dari hasil penelitian yang diperoleh dapat dikonfirmasi bahwa konsentrasi partikel-partikel magnet (Fe3O4) pada permukaan MAC meningkat setelah proses impregnasi. Walaupun demikian, hal ini menyebabkan turunnya kemampuan adsorbsi dari adsorben MAC. Perbandingan rasio Fe2+ and Fe3+ tidak secara nyata mempengaruhi efisiensi penyerapan zat warna. Adsorben MAC dari karbon aktif lokal memiliki potensi sebagai bahan alternatif ramah lingkungan untuk penyerap zat warna.
Simulation of CO2 Gas Adsorption Process Flow at Cyclone Gas Outlet in Palm Oil Mills Using Computation Fluid Dynamic Simulation Novi Sylvia; Yunardi Yunardi; Husni Husni; Abrar Muslim
International Journal of Engineering, Science and Information Technology Vol 1, No 3 (2021)
Publisher : Master Program of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (298.954 KB) | DOI: 10.52088/ijesty.v1i3.112

Abstract

Cyclone separator is equipment used to control emissions  from gas flow in industrial processes. The principle of removing particulates from the gas flow in this tool is to use the centrifugal force. The centrifugal force generated from the rotating flow will make dust       particles wasted into the cyclone wall where the dust will then fall into the hopper. Adsorption is a series of processes for the accumulation of a substance (adsorbate) on the surface of another substance (adsorbent). Adsorption can occur because of the energy on the surface and the attraction force on the surface. This study aims to obtain a good CO2 adsorption efficiency from modifying the cyclone separator using an adsorption column, analyzing the CO2 gas adsorption process produced from the biomass system at the utility unit boiler station at the Palm Oil Mill (PMO) using a modified cyclone. This simulation was carried out using the Autodesk Inventor Professional 2017 (Student Version) application for the descripction of the tool as a preprocessor and Ansys 2019 R3 (Student Version) applications as a processor and post processor. The variations that were applied included the adsorption column bed height of 3100 mm and 4650 mm, respectively, CO2 gas flow rates of 10, 12.5, 15, 17.5, 20, 22.5 dan 25 m/s and mass loading 0,001 kg/s. The results obtained in the most optimal modification of the cyclone separator are at a bed height of 3100 mm with the highest adsorption percentage 93.437%, the highest flow 91.974% with a pressure drop of 1000 Pa.
Effects of Fe2+ and Fe3+ ratio impregnated onto local commercial activated carbon coconut shell powder on the dye removal efficiency Izarul Machdar; Cut Faradillasari; Nurul Atika Khair; Teku Muhammad Asnawi; Alfiansyah Yulianur BC; Y Yunardi
Jurnal Litbang Industri Vol 8, No 1 (2018)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.692 KB) | DOI: 10.24960/jli.v8i1.3720.11-16

Abstract

The present study reports the performance of magnetic activated carbon impregnated with Fe2+ and Fe3+ on the removal of dye from a simulated wastewater. The magnetic activated carbon (MAC) as a magnetic absorbent was prepared by co-precipitation method and followed by impregnation process. The activated carbon (AC) was supplied from a local commercial activated carbon coconut shell powder. The objective of this study was to investigate the effects of Fe2+ and Fe3+ on the quality product of MAC for dye (methylene blue) adsorption. The molar ratios of Fe2+ and Fe3+ used during the preparation of the MAC were 1:1; 1:2, and 2:1. The MAC products were characterized by using scanning electron microscope (SEM), energy dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FT-IR) analysis techniques. The results confirmed that the concentration of magnetic particles (Fe3O4) on the MAC surface increased following the impregnation process. However, this results lowering adsorption properties of the MAC adsorbents, which subsequently affected the dye removal performance. The ratio of Fe2+:Fe3+ on the MAC preparation did not significantly change the MAC absorbent on the dye removal efficiency. Additionally, MAC derived from local AC possess a prospect as a sustainable alternative for dye pollutant adsorbent.AbstrakPenelitian ini melaporkan kinerja karbon aktif bersifat magnet yang di impregnasi dengan Fe2+dan  Fe3+ dalam penyerapan zat warna dari air limbah buatan. Karbon aktif bersifat magnet (MAC) dibuat melalui metode co-presipitasi dan diikuti dengan proses impregnasi. Material karbon aktif (AC) dibuat dari tempurung kelapa yang diperoleh dari pasar lokal. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh ratio dari Fe2+ and Fe3+ terhadap kualitas produk MAC yang digunakan nantinya di dalam proses penyerapan zat warna (metilen biru). Rasio molar dari Fe2+ and Fe3+ yang digunakan di dalam penelitian ini untuk menghasilkan MAC adalah 1:1; 1:2, dan 2:1. Produk MAC yang dihasilkan dipelajari karakteristiknya melalui scanning electron microscope (SEM), energy dispersive X-ray (EDX), dan Fourier transform infrared spectroscopy (FT-IR). Dari hasil penelitian yang diperoleh dapat dikonfirmasi bahwa konsentrasi partikel-partikel magnet (Fe3O4) pada permukaan MAC meningkat setelah proses impregnasi. Walaupun demikian, hal ini menyebabkan turunnya kemampuan adsorbsi dari adsorben MAC. Perbandingan rasio Fe2+ and Fe3+ tidak secara nyata mempengaruhi efisiensi penyerapan zat warna. Adsorben MAC dari karbon aktif lokal memiliki potensi sebagai bahan alternatif ramah lingkungan untuk penyerap zat warna.
Characterization of Bottom Ash Waste Adsorbent from Palm Oil Plant Boiler Burning Process to Adsorb Carbon Dioxide in a Fixed Bed Column Novi Sylvia; Fitriani Fitriani; Rozanna Dewi; Rizka Mulyawan; Abrar Muslim; Husni Husin; Yunardi Yunardi; Mutia Reza
Indonesian Journal of Chemistry Vol 21, No 6 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.66509

Abstract

Palm oil bottom ash utilization from mill boilers as CO2 adsorbent has been in use for few years. This study aims to examine adsorbent characteristics and capabilities of bottom ash produced from boiler combustion in palm oil industry for CO2 adsorption before and after utilization, such as compound functional group using the Fourier Transform Infra-Red (FT-IR) spectrophotometer, adsorbent morphology through Scanning Electron Microscopy (SEM), and compound amount using Energy Dispersive X-Ray Spectroscopy (EDX). The CO2 adsorption was carried out in fixed-bed column. Process variables consist of volumetric flow rate, contact time and bed height. Results showed that SiO2 compounds in the heterogeneous form with average particle size of 1073 nm, as supported by FT-IR spectrum finding indicating SiO2 signal at wavelength of 958–954 cm–1. Additionally, EDX analysis showed Silica and Oxygen content of 11.88% and 36.90%, resulting 70% CO2 adsorption capacity of 0.350 mg/g at discharge of 5 L/min, contact time of 40 min, and bed height of 12 cm. Langmuir isotherm model was obtained with R2 of 0.998, qm of 1.588, and kL of 0.144. Meanwhile, the kinetic model followed a simple first-order prototypical with R2 of 0.952, C02 of 0.260, and k1 of 0.006.
ANALISA PENGARUH RASIO SERAT DAN CANGKANG DENGAN UDARA BERLEBIH TERHADAP EMISI PROSES PEMBAKARAN PADA BOILER PABRIK KELAPA SAWIT Novi Sylvia; Husni Husin; Abrar Muslim; Yunardi Yunardi
Journal of Mechanical Engineering Vol 4, No 2 (2020): Journal of Mechanical Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jom.v4i2.3413

Abstract

Pertumbuhan industri sawit yang tinggi dalam dua decade terakhir menempatkan Indonesia sebagai produsen minyak sawit terbesar dunia.  Industri sawit selain menghasilkan minyak nabati, juga menghasilkan limbah padat antara lain serat dan cangkang.  Sebagian dari limbah padat ini dimanfaatkan sebagai sumber bahan bakar di boiler untuk menghasilkan uap yang dimanfaatkan untuk pemrosesan dan menghasilkan energi listrik.   Paper ini melaporkan hasil kajian simulasi pengaruh rasio serat dan cangkang pada berbagai kondisi udara berlebih terhadap emisi gas hasil pembakaran yang dihasilkan. Penelitian ini menjadi penting mengingat pabrik minyak kelapa sawit ditengarai sebagai salah satu penghasil gas rumah kaca (GRK) dan pemerintah melalui Peraturan Menteri Negara Lingkungan Hidup Nomor 12 tahun 2010 bertekad mengurangi emisi GRK. Perangkat lunak ASPEN Plus (Versi 8.8) digunakan untuk memvariasikan rasio serat : cangkang berkisar 100:0; 30:70; 70:30; 50:50 dan 0:100 dengan udara berlebih 90, %, 120% dan 150% di atas kebutuhan stoikiometri. Bahan bakar dialirkan dengan laju tunak ke dalam proses sebesar 2700 kg/jam. Hasil simulasi menunjukkan bahwa kualitas emisi terbaik dihasilkan ketika rasio serat dan cangkang = 0 : 100 dengan udara berlebih sebesar 90%.  Pada kondisi seperti ini, gas  CO2 yang dihasilkan sebesar 719 kg/jam, NO 0,032 kg/jam dan laju abu sebesar 94 kg/jam. Heating value tertinggi juga diperoleh pada rasio serat dan cangkang = 0 : 100.  Hasil ini menunjukkan bahwa kehadiran serat di dalam bahan bakar memberikan kontribusi negatif terhadap emisi.  Kajian lebih mendalam masih diperlukan untuk meminimalisir limbah padat serat ini untuk digunakan sebagai sumber bahan bakar.
Effects of Fe2+ and Fe3+ ratio impregnated onto local commercial activated carbon coconut shell powder on the dye removal efficiency Izarul Machdar; Cut Faradillasari; Nurul Atika Khair; Teku Muhammad Asnawi; Alfiansyah Yulianur BC; Y Yunardi
Jurnal Litbang Industri Vol 8, No 1 (2018)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.692 KB) | DOI: 10.24960/jli.v8i1.3720.11-16

Abstract

The present study reports the performance of magnetic activated carbon impregnated with Fe2+ and Fe3+ on the removal of dye from a simulated wastewater. The magnetic activated carbon (MAC) as a magnetic absorbent was prepared by co-precipitation method and followed by impregnation process. The activated carbon (AC) was supplied from a local commercial activated carbon coconut shell powder. The objective of this study was to investigate the effects of Fe2+ and Fe3+ on the quality product of MAC for dye (methylene blue) adsorption. The molar ratios of Fe2+ and Fe3+ used during the preparation of the MAC were 1:1; 1:2, and 2:1. The MAC products were characterized by using scanning electron microscope (SEM), energy dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FT-IR) analysis techniques. The results confirmed that the concentration of magnetic particles (Fe3O4) on the MAC surface increased following the impregnation process. However, this results lowering adsorption properties of the MAC adsorbents, which subsequently affected the dye removal performance. The ratio of Fe2+:Fe3+ on the MAC preparation did not significantly change the MAC absorbent on the dye removal efficiency. Additionally, MAC derived from local AC possess a prospect as a sustainable alternative for dye pollutant adsorbent.AbstrakPenelitian ini melaporkan kinerja karbon aktif bersifat magnet yang di impregnasi dengan Fe2+dan  Fe3+ dalam penyerapan zat warna dari air limbah buatan. Karbon aktif bersifat magnet (MAC) dibuat melalui metode co-presipitasi dan diikuti dengan proses impregnasi. Material karbon aktif (AC) dibuat dari tempurung kelapa yang diperoleh dari pasar lokal. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh ratio dari Fe2+ and Fe3+ terhadap kualitas produk MAC yang digunakan nantinya di dalam proses penyerapan zat warna (metilen biru). Rasio molar dari Fe2+ and Fe3+ yang digunakan di dalam penelitian ini untuk menghasilkan MAC adalah 1:1; 1:2, dan 2:1. Produk MAC yang dihasilkan dipelajari karakteristiknya melalui scanning electron microscope (SEM), energy dispersive X-ray (EDX), dan Fourier transform infrared spectroscopy (FT-IR). Dari hasil penelitian yang diperoleh dapat dikonfirmasi bahwa konsentrasi partikel-partikel magnet (Fe3O4) pada permukaan MAC meningkat setelah proses impregnasi. Walaupun demikian, hal ini menyebabkan turunnya kemampuan adsorbsi dari adsorben MAC. Perbandingan rasio Fe2+ and Fe3+ tidak secara nyata mempengaruhi efisiensi penyerapan zat warna. Adsorben MAC dari karbon aktif lokal memiliki potensi sebagai bahan alternatif ramah lingkungan untuk penyerap zat warna.
Co-Authors Abrar Muslim Abrar Muslim Abrar Muslim Alfiansyah Yulianur BC Alfiansyah Yulianur BC Asnawi, Teku Muhammad Cut Faradillasari Faradillasari, Cut Fitriani Fitriani Husni Husin Husni Husin Husni Husni Izarul Machdar Khair, Nurul Atika Machdar, Izarul Mutia Reza Novi Sylvia Nurul Atika Khair Rizka Mulyawan Rozanna Dewi Teku Muhammad Asnawi