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All Journal JURNAL KIMIA SAINS DAN APLIKASI Indonesian Journal of Applied Sciences Jurnal Sains Materi Indonesia Jurnal Informatika dan Teknik Elektro Terapan Jurnal Zeolit Indonesia Chimica et Natura Acta Indonesian Mining Journal JOURNAL OF SCIENCE AND SOCIAL RESEARCH Journal of Computer System and Informatics (JoSYC) Money: Journal of Financial and Islamic Banking Journal of Technology Informatics and Engineering Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Ilmiah Teknologi Pertanian Agrotechno
Juliandri Juliandri
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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Understanding The Role of Diffusion in The Separation of Rare Earth Elements in Water-n-hexane Systems: A Molecular Dynamics Simulation Study Hardianto, Ari; Janitra, Regaputra Satria; Fauzi, Muhammad Ryan; Juliandri, Juliandri; Anggraeni, Anni; Soedjanaatmadja, Ukun Mochammad Syukur
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 10 No. 2 (2023): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v10i2.30680

Abstract

Liquid-liquid extraction is one of the methods for separating rare earth elements (REE) in the presence of an extractant. The separation of REE ions, complex with an extractant, involves interfacial migrations that are influenced by the diffusion of the respective ions. Therefore, we performed molecular dynamics simulations on REE ions (La3+, Sm3+, Eu3+, Gd3+, and Tb3+) in a water-n-hexane system to determine if each ion exhibited a distinct diffusion coefficient. By employing molecular dynamics simulations, we calculated diffusion coefficients for these ions based on the Einstein relation. The diffusion coefficients for La3+, Sm3+, Eu3+, Gd3+, and Tb3+ were found to be 4.21×10–6, and 3.96×10–6, 4.57×10–6, 4.17×10–6, and 5.19×10–6 cm2/s, respectively. However, statistical analysis via the Kruskal-Wallis test revealed no significant variance in the diffusion coefficients (p-value greater than 0.05), indicating that diffusion is not a rate-limiting factor in REE separation. The findings suggest that effective mixing during extraction can eliminate the role of diffusion as a differentiating factor in REE separation. Overall, this study offers critical insights into optimizing REE extraction processes
Pengaruh Kadar Air dalam Minyak Kemiri Sunan pada Tahap Esterifikasi dengan Katalis Asam Sulfat Haryono; Juliandri; Rustaman
Jurnal Ilmiah Teknologi Pertanian Agrotechno Vol. 8 No. 2 (2023): Oktober
Publisher : Fakultas Teknologi Pertanian, Universitas Udayana Gedung GA, Fakultas Teknologi Pertanian, Universitas Udayana Jl. Raya Bukit Jimbaran, Jimbaran, Kuta Selatan, Bali Telp/Fax: (0361) 701801

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITPA/2023.v08.i02.p06

Abstract

Kemiri sunan oil is non-food oil. Therefore, kemiri sunan oil can be a potential raw material for biodiesel synthesis. Kemiri sunan oil has relatively high free fatty acid content so that before the transesterification step with a homogeneous base catalyst it is necessary to esterify it first. In esterification, the water content in oil and fat as raw material for biodiesel affects the conversion rate of free fatty acids into biodiesel, so this needs to be studied. The purpose of this study was to study the effect of water content in kemiri sunan oil on the conversion of free fatty acids into biodiesel at the esterification stage. The research was conducted by quantitative experiment. Variations of water content in kemiri sunan oil were obtained through evaporation at a temperature of 105 oC with time variations of 1, 1.5 and 2 hours. Esterification was carried out at a temperature of 60 oC, mole ratio of oil to methanol of 1:6, reaction time of 1.5 hours, and 98% sulfuric acid catalyst as much as 1%. The results showed that the less water content in the kemiri sunan oil, the less free fatty acids contained in the biodiesel from the esterification result.
Co-Authors Ace T. Hidayat Agus Safari Ajar Faflul Abror Anni Anggraeni Anni Anggraeni, Anni Ari Hardianto Arpizal Atiek Rostika Noviyanti Cindy Chintya Aulia Telaumbanua Dhony Hermanto Dian Kurnia Diana Rakhmawaty Eddy Fajar Firmansyah Fauzi, Muhammad Ryan Ferli S. Irwansyah Ferli S. Irwansyah, Ferli S. Firmansyah, Fajar Harahap, Sahyunan Haryono Haryono Haryono Haryono Iman Rahayu IWAN HASTIAWAN Iwan Hastiawan Iwan Hastiawan Iwan Hastiawan Jamaludin Al-Anshori Janitra, Regaputra Satria Muhammad Fajar Muhammad Rizki Muhammad Ryan Fauzi N.T. PONGAJOW Nicolin Tirza Pongajow Nurul Ismillayli R. Ukun M.S. Soedjanaatmadja Regaputra Satria Janitra Rifki Septawendar Rifki Septawendar Rochmad K Sanjaya Rustaman Rustaman Sanjaya, Rochmad K Siahaan, Muhammad Donni Lesmana Siregar, Zailani Amir Soewanto Rahardjo Soewanto Rahardjo, Soewanto Solihudin Solihudin Sufaat, Imam TATI NURHAYATI Titin Siti Fatimah Titin Siti Fatimah Ukun Mochammad Syukur Soedjanaatmadja Wahyu, Wadri