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All Journal International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Jurnal Polimesin
Paepenan, Semuel Poumer
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Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Utilization of Sengon Wood Sawdust as Bio-Pellet Feedstock: Characteristics, Potential, and Feasibility for Renewable Energy Setyawan, Eko Yohanes; Paepenan, Semuel Poumer
Jurnal Polimesin Vol 22, No 4 (2024): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i4.4916

Abstract

The pellet-making process involves stages of drying, compaction, cooling, and size separation. Considering that Indonesia has great potential for biomass supply, this research aims to identify the characteristics of bio-pellets produced from sengon wood sawdust based on the pellet standard SNI8675:2018. The results showed that the highest calorific value at the Dry Basis (DB) condition was 4703 Kcal/kg, meeting national and international standards. The moisture content in the As Received (AR) condition was recorded at 10.36%, while the lowest ash content was 1.72%. The highest combustion rate was found in sample 3, with a value of 0.174 gr/min, indicating good combustion performance. The utilization of sengon wood sawdust as bio-pellets can be an efficient and environmentally friendly renewable energy solution, and has the potential to be further developed to support diversification and national energy security.
ANALYSIS OF THE EFFECT OF TEMPERATURE ON THE PHYSICAL PROPERTIES OF CATALYTIC CRACKING OF COCONUT OIL MICROEMULSION BIODIESEL Paepenan, Semuel Poumer; Hamidi, Nurkholis; Purnami, Purnami; Anggara, Teuku
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.5

Abstract

This study aims to analyze the effect of catalytic cracking temperature variation on the physical properties of coconut oil-based microemulsion biodiesel using a zeolite catalyst. The microemulsion biodiesel was produced by mixing coconut oil, ethanol, and butanol, followed by catalytic cracking treatment at temperatures of 50°C, 75°C, 95°C, 125°C, and 150°C. The key parameters observed included viscosity, density, flash point, calorific value, and cetane number. The results showed that increasing the catalytic cracking temperature led to a decrease in viscosity from 15.24 stokes in its initial state to 10.48 stokes at 150°C, indicating the breakdown of heavy molecules into lighter fractions. Density fluctuated, reaching its highest value of 0.879 g/cm³ at 75°C before stabilizing at approximately 0.878 g/cm³ at 150°C. The flash point exhibited a non-linear trend, peaking at 30.5°C at 75°C before decreasing again. The calorific value increased significantly from 8769.70 cal/gram to 9342.93 cal/gram at 150°C, demonstrating an enhancement in the energy content of the biodiesel. Meanwhile, the cetane number was recorded at 75 at both 95°C and 150°C, indicating good combustion quality. Based on these findings, the optimal catalytic cracking temperature was determined to be 150°C, yielding biodiesel with lower viscosity, higher calorific value, and improved combustion performance. This study demonstrates that catalytic cracking can enhance the quality of microemulsion biodiesel, with further optimization potential for industrial-scale applications.
Co-Authors Anggara, Teuku Nurkholis Hamidi Purnami Purnami Setyawan, Eko Yohanes