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All Journal Rekayasa Mesin Jurnal Elemen Jurnal Teknik Mesin Indonesia Accurate: Journal of Mechanical Engineering and Science Jurnal Pengabdian Kepada Masyarakat Jurnal Teknik Mesin, Industri, Elektro dan Informatika Venus: Jurnal Publikasi Rumpun Ilmu Teknik J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin
Rany Puspita Dewi
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PEMANFAATAN KULIT DURIAN UNTUK MENGHASILKAN BAHAN BAKAR ALTERNATIF MELALUI PROSES FAST PYROLISIS Muhammad Zanu Nur Arsyad Arsyad; Rany Puspita Dewi; Nur Hayati
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.325

Abstract

Durian skin waste has not been utilized properly so in the end it just piles up in the trash, so a study is needed to reduce the amount of durian skin waste that is not utilized properly. Pyrolysis is a heating process without oxygen. This study aimed to determine the amount of bio-oil, viscosity value, density value, and calorific value of the durian skin waste tested. Temperatures of 350 ℃, 400 ℃, and 450 ℃ are variations in this study. The study's results using the fast pyrolysis process were 120 ml, 130 ml, and 150 ml. The resulting viscosity values ​​are 5.4 mm²/s, 5.2 mm²/s, and 4.6 mm²/s, the resulting density values ​​are 725.5 kg/m³, 727.7 kg/m³, and 743.3 kg/m³. The resulting calorific values ​​are 14.6 MJ/kg, 17.1 MJ/kg, and 18.5 MJ/kg.
SELEKTIVITAS HIDROKARBON PADA SINTESIS FISCHER–TROPSCH BERBASIS SYNGAS KULIT KOPI MENGGUNAKAN SOFTWARE ASPEN PLUS Benazir Zulfana Anwar; Arif Rahman Saleh; Rany Puspita Dewi; Tri Retno Setiyawati
ELEMEN : JURNAL TEKNIK MESIN Vol. 13 No. 1 (2026)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v13i1.418

Abstract

Indonesia’s continued dependence on non-renewable fossil energy sources contrasts with the underutilization of New and Renewable Energy (NRE), despite its abundant resource availability. One promising yet underexploited NRE source is coffee husk biomass, which is generated in large quantities as a by-product of plantation activities. This study aims to analyze hydrocarbon selectivity in the Fischer–Tropsch (FT) synthesis process using syngas derived from coffee husk gasification through thermochemical modeling in ASPEN Plus. Simulations were conducted at an operating temperature of 240ºC and a pressure of 25 bar using various thermodynamic methods. The results indicate that the product distribution is dominated by heavy hydrocarbons (C₅⁺), with selectivity values of 9.881% for the Grayson model, 5.341% for BK10, and the highest value of 1.333×10¹% obtained using the Peng–Robinson equation of state, while light hydrocarbons exhibit selectivity in the order of 10⁻⁶–10⁻³. The Peng–Robinson model demonstrates the most representative performance for predicting liquid heavy hydrocarbons from biomass-based Fischer–Tropsch synthesis.
Co-Authors Ali Suhadla Arif Rahman Saleh Benazir Zulfana Anwar Herru Santosa Budiono Indriyanto, Syahlan Muhammad Lintang Saputra Muhammad Zanu Nur Arsyad Arsyad Naufal Dwi Qurniawan Nur Hayati Nurhadi Nurmala Dyah Fajarningrum Sajiwo, Anom Lugas Sigit Iswahyudi Sigit Joko Purnomo Sigit Mujiarto Sutrisno, Seno Tri Retno Setiyawati Trisma Jaya Saputra