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All Journal Jurnal Rekayasa Proses Reaktor International Journal of Renewable Energy Development Jurnal Bahan Alam Terbarukan Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Prosiding Semnastek PROSIDING SEMINAR NASIONAL CENDEKIAWAN Jurnal Rekayasa Proses ASEAN Journal of Chemical Engineering Abdimas Singkerru Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Medic Nutricia : Jurnal Ilmu Kesehatan International Journal of Renewable Energy Development Jurnal Rekayasa Proses JURNAL REKAYASA KIMIA & LINGKUNGAN Jurnal Bahan Alam Terbarukan Nemui Nyimah
Heri Rustamaji
Teknik Kimia, Universitas Lampung
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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Nursing Public Health Social Sciences Veterinary Other

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Journal : International Journal of Renewable Energy Development

 1 
Synthesis and Characterization of Hydrochar and Bio-oil from Hydrothermal Carbonization of Sargassum sp. using Choline Chloride (ChCl) Catalyst Heri Rustamaji; Tirto Prakoso; Jenny Rizkiana; Hary Devianto; Pramujo Widiatmoko; Guoqing Guan
International Journal of Renewable Energy Development Vol 11, No 2 (2022): May 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.42595

Abstract

The purpose of this study is to alter the biomass of Sargassum sp. into elective fills and high valuable biomaterials in a hydrothermal process at 200oC for 90 minutes, using ZnCl2 and CaCl2 activating agents, withChClas a catalyst. This method generatedthree primaryoutputs: hydrochar, bio-oil, and gasproducts. ChCl to water ratio varies from 1:3, 1:1, and 3:1. The hydrochar yield improved when the catalyst ratio was increased, but the bio-oil and gas yield declined. The highest hydrochar yields were 76.95, 63.25, and 44.16 percent in ZnCl2, CaCl2, and no activating agent samples, respectively.The porosity analysis observed mesopore structures with the most pore diameters between 3.9-5.2 nm with a surface area between 44.71-55.2. The attribute of interaction between activator and catalyst plays a role in pore formation. The hydrochar products with CaCl2 showed the best thermal stability. From the whole experiment, the optimum hydrochar yield (76.95%), optimum surface area (55.42 m2 g-1), and the increase in carbon content from 21.11 to 37.8% were achieved at the ratio of ChCl to water was three, and the activating agent of ZnCl2. The predominant bio-oil components were hexadecane, hexadecanoic, and 9-octadecenoic acids, with a composition of 51.65, 21.44, and 9.87%, respectively the remaining contained aromatic alkanes and other fatty acids. The findings of this study reported that adding activating agents and catalysts improve hydrochar yield and characteristics of hydrochar and bio-oil products, suggesting the potential of hydrochar as a solid fuel or biomaterial and bio-oil as liquid biofuel
Synthesis of rubber seed shell-derived porous activated carbons for promising supercapacitor application Rustamaji, Heri; Prakoso, Tirto; Devianto, Hary; Widiatmoko, Pramujo; Febriyanto, Pramahadi; Ginting, Simparmin br; Darmansyah, Darmansyah
International Journal of Renewable Energy Development Vol 14, No 2 (2025): March 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60869

Abstract

This work investigates synthesizing activated carbon obtained from rubber seed shells utilizing several activating agents (KOH, CaCl2, and ZnCl2) for supercapacitor applications. Activated carbon was produced from a rubber seed shell using hydrothermal carbonization at 275 °C for 60 minutes and a 120-minute activation treatment at 800 °C. Various activating agents pronounced impacted the pore architecture, surface area, crystallinity, and level of graphitization, which collectively determined the electrochemical characteristics of the resulting materials. Incorporating activation agents enhances the specific surface area and influences the extent of graphitization of activated carbon. The specific surface area of activated carbon products ranges from 367 to 735.2 m² g⁻¹. Further investigation through electrochemical analysis, conducted with a carefully engineered two-electrode system, demonstrated a peak electrode capacitance value of 246 F g-1 at 50 mA g-1 for an ACZn-based supercapacitor. Supercapacitor cells’ energy and power densities reached significant levels, measuring 5.47 Wh kg-1 and 246 W kg-1, respectively. The RSS-derived activated carbon-based supercapacitor exhibited remarkable longevity in a 5000-cycle test, with consistent capacitance retention and coulombic efficiency of 100.11% and 100%, respectively. This work presents a sustainable pathway for producing activated carbon electrodes, contributing to the global circular economy and demonstrating considerable industrial potential.
Co-Authors Ade Okta Viani Agustian, Joni Ari Wibowo Arief Budiman Arief Budiman Aviati S., Yuniar Azhar Azhar Azhar Daniel Yonathan, Daniel Darmansyah DARMANSYAH . Devianto, Hary Dewi Agustina Iryani Dewi Agustina Iryani, Dewi Agustina Djana, Miftahul Djanna, M Donny Lesmana Erfani, S Erisha Putri Erlangga, Sona Febrianti, A Febriyanto, Pramahadi Ghea Maulidaco Anandati Ginting, Simparmin Boru Guan, Guoqing Guoqing Guan Hary Devianto Hary Devianto Hary Sulistyo Hary Sulistyo Hermida, Lilis Herry Wardono Herti Utami Herti Utami Hillary, S Indriyati Indriyati Isdiriayani Nurdin Jenny Rizkiana Joni Agustian Lilis Hermida Lismeri, Lia Listiani, Nita M. Haviz Martinus Miranda, Thalya Nandi Haerudin Nita Listiani Panca Nugrahini Febriningrum Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Putri, Erisha Rizkiana, Jenny Rustamaji, Galuh S Septi Qomah Simparmin br Ginting Solly Aryza Sri Ismiyati Damayanti Sumanjaya, Erlan - Thalya Miranda Tirto Prakoso Tirto Prakoso Tirto Prakoso Utami, Heri Vitri Dyah Herawati Widiatmoko, Pramujo Wijaya, Muhammad Niki Yuli Darni Yuli Darni Zulfa Fauziyyah