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All Journal Jurnal Natur Indonesia Science and Technology Indonesia Indonesian Journal of Chemistry ALKIMIA : Jurnal Ilmu Kimia dan Terapan Jurnal Teori dan Aplikasi Fisika Indonesian Journal of Energy Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Sinar Sang Surya: Jurnal Pusat Pengabdian kepada Masyarakat Journal of Multidisciplinary Applied Natural Science Buguh: Jurnal Pengabdian Kepada Masyarakat Makara Journal of Science Bulletin of Chemical Reaction Engineering & Catalysis Analit: Analytical And Environmental Chemistry
Wasinton Simanjuntak
Universitas Lampung
Agriculture, Biological Sciences & Forestry Humanities 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 Education Energy Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Journal : Journal of Multidisciplinary Applied Natural Science

 1 
The Effect of MgO Loads on Catalytic Activity of MgO/SiO2 in Coconut Oil Transesterification Pandiangan, Kamisah Delilawati; Simanjuntak, Wasinton; Ilim, Ilim; Alista, Diska Indah; Noviana, Erika
Journal of Multidisciplinary Applied Natural Science Vol. 5 No. 2 (2025): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.257

Abstract

This research aims to obtain biodiesel by transesterification of coconut oil with MgO/SiO2 as a catalyst, with the objective to examine the effect of MgO loads on the performance of the catalysts expressed in terms of oil conversion. The MgO/SiO2 composites with different mass ratios of 1:1, 1:2, 1:3, 1:5, and 1:10 were synthesized from Mg(NO3)·6H2O and SiO2 extracted from rice husk silica using sol-gel method and followed by calcination at 800 °C for 6 h. The produced catalysts were then tested in the transesterification of coconut oil to investigate the effect of catalyst composition, oil to methanol ratios, and reaction times. The experiments were carried out using a fixed catalyst load of 10% oil (w/v) and at 70 °C. The catalyst with the highest performance was then characterized by using X-ray diffraction (XRD) and scanning electron microscopy (SEM) to confirm the formation of crystalline MgO/SiO2. The highest conversion of the transesterification product was analyzed using gas chromatography-mass spectrometry (GC-MS) technique to confirm the biodiesel production. The XRD diffractogram of the synthesized sample is characterized by the presence of sharp peaks confirming the existence of the sample as crystalline material attributed to the pyroxene-ideal (MgO3Si) phase. The existence of the sample as crystalline material is also supported by the absence of a broad diffraction peak attributed to amorphous rice husk silica, and SEM image of the sample which is characterized by the visible existence of crystalline structure in the forms of platelet prismatic, and tetrahedral shaped structures. The results demonstrated that the highest conversion (98%) was achieved with the use of MgO/SiO2 (1:5) as a catalyst, a ratio of oil to methanol of 1:6, and a reaction time of 4 h. The formation of methyl esters was confirmed by the results of GC-MS analysis.
Enhancing Electrical Characteristics in a High-Power Seawater Battery: Solutions with Acid Zinc Anolyte and Alumina-Carbon-Cement Separator Pauzi, Gurum Ahmad; Surtono, Arif; Suciyati, Sri Wahyu; Syafriadi, Syafriadi; Samosir, Ahmad Saudi; Sulistiyanti, Sri Ratna; Simanjuntak, Wasinton
Journal of Multidisciplinary Applied Natural Science Vol. 5 No. 2 (2025): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.267

Abstract

The potential of seawater as a source of galvanic cell energy has not been fully realized due to significant challenges, particularly anode degradation in single-compartment high-power seawater batteries. This study addresses these limitations by introducing a novel two-compartment system, utilizing an acid zinc anolyte and an alumina-carbon-cement separator designed to enhance both the electrical performance and longevity of the battery. Experimental results demonstrate a remarkable increase in current output (97.81 times) and a substantial boost in power (5.25 times) compared to conventional single-compartment cells. Furthermore, the internal resistance of the system is reduced by 95.7%, indicating improved energy transfer efficiency. The use of the alumina-carbon-cement separator effectively mitigates anode corrosion, a common issue that limits the operational lifespan and reliability of seawater batteries. These findings suggest that the proposed two-compartment configuration not only overcomes critical technical barriers but also offers a promising and sustainable alternative for renewable energy generation from seawater. The enhanced performance and durability of this system highlight its potential for practical applications in marine and coastal energy harvesting, contributing to the advancement of clean energy technologies.
Co-Authors Afra Nabila Saputri Agung Abadi Kiswandono Ahmad Pauzi, Gurum Ahmad Saudi Samosir Al Muttaqii, Muhammad Alista, Diska Indah Amrulloh, Hanif Anjarwati, Arie Atika Nisrina Aulia, Syayyidati Damayanti, Putri Delilawati Pandiangan, Kamisah Diki Hidayat Emantis Rosa Eniya Listiani Dewi Erik Prasetyo Fajriyati, Nurul Faranida, Qori Hikmah Gom, Frangky Gom Hidayah, Laila Iip Sugiharta Ilim Ilim Ilim Ilim, Ilim Irwan Ginting Suka Kamisah D Pandiangan Kamisah Delilawati Pandiangan Luthfia, Hanna Marbun, Maja Pranata MARIA BINTANG Maryani, Tri Mita Rilyanti Mita Rilyanti Ninid Widya Sari Lubis Nisa, Mia Abi Noviana, Erika Nurhasanah Husin Nurhasanah Nurhasanah Oktivianty, Shella Windi Pandiangan, Kamisah D Pandiangan, Kamisah Delilawati Pauzi, Gurum Ahmad Pratama, Dian Septiani Pulung Karo-Karo Rinawati Rinawati Riyanti, Faulia Riza Alviany Sabil, Muhammad Sibuea, Andreas Silalahi Raja, Havier Samuel Huttur Simon Sembiring Simon Sembiring Simon Sembiring Situmeang, Rudy T M Sri Ratna Sulistiyanti Sri Wahyu Suciyati Sugeng Priyanto, Sugeng Supriyanto Supriyanto Surtono, Arif Sutopo Hadi Syafaat AM, Fuad Syafriadi Syafriadi Tasyadinia, Tasyadinia Tati Suhartati Triastuti Sulistyaningsih Visiamah, Fenti Wan Abbas Zakaria Wan Abbas Zakaria Yandri Yandri yati, indri Yuliyanda, Devi Zipora Sembiring