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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Sorption Studies
Ningrum, Hanifa Setya
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Drone Berbahan Komposit Serat Rami Dengan Karbon Aktif-Barium M-Heksaferit Sebagai Radar Absorbing Material Aritonang, Sovian; Hijrianisa, Alya; Pratita, Elda; Ningrum, Hanifa Setya; Pangestu, Bintang Brilliant
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17283

Abstract

Radar is a crucial tool in military applications for detecting enemy objects in its vicinity, but its presence can pose a risk of being detected by adversaries. Therefore, this research focuses on the development of Radar Absorbing Material (RAM) using activated carbon obtained from cassava peel and Barium M-Hexaferrite. The research results indicate that this combination can be used as a protective layer on military drones made of composite hemp fibers, enhancing the drone's ability to absorb radar waves, thus reducing the risk of detection by adversaries. This improves the effectiveness of military operations and contributes to environmental preservation through the use of eco-friendly materials. 
Modification of Calcium Oxide Catalyst Derived from Chicken Eggshell Waste with Magnesium Oxide to Enhance Biodiesel Synthesis from Crude Palm Oil Hamidah, Fikriyah; Septaningsih, Dewi Anggraini; Fahri, Mirad; Basuki, Rahmat; Gunaryo; Subiakto, Amadea Kenyoning Hapsari; Nismarawati, Ardine Kusuma; Ningrum, Hanifa Setya; Fajry, Zaydan Al; Erwinda, Maura Agnes; Afandi, Achmad Kusyairi
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.115

Abstract

Biodiesel is a promising renewable energy source to replace conventional diesel fuel. This study aims to improve biodiesel production efficiency by utilizing a heterogeneous catalyst derived from chicken eggshell-based calcium oxide (CaO), modified with magnesium oxide (MgO). The catalyst was synthesized via co-precipitation and applied in both transesterification and interesterification reactions using crude palm oil (CPO) as feedstock. The optimum reaction was conducted at 65°C for 180 minutes with a 9:1 methyl acetate/methanol to oil molar ratio and 2.5 wt% catalyst loading. The modified CaO.MgO catalyst outperformed unmodified CaO, yielding 89.63% and 99.96% biodiesel via interesterification and transesterification, respectively. The catalyst characterization was performed using FTIR, XRD, and GC-MS, confirming the enhancement in basicity, crystallinity, and FAME content. This study demonstrates the potential of waste-derived catalysts in sustainable biodiesel production while addressing environmental waste issues.
Co-Authors Afandi, Achmad Kusyairi Aritonang, Sovian Erwinda, Maura Agnes Fahri, Mirad Fajry, Zaydan Al Gunaryo Hamidah, Fikriyah Hijrianisa, Alya Nismarawati, Ardine Kusuma Pangestu, Bintang Brilliant Pratita, Elda Rahmat Basuki Septaningsih, Dewi Anggraini Subiakto, Amadea Kenyoning Hapsari