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Abstract

Indonesia is reducing reliance on fossil fuels by expanding renewable energy, including biomass from rubber-plantation residues and acacia wood. This study evaluates briquettes made from rubber seed shell (RSS) and acacia sawdust (AWS) using 10% tapioca binder, a compaction pressure of 50 kgf cm⁻², and drying at 100 °C for 3 h. Three compositions (RSS:AWS, %wt) were tested: A (50:50), B (70:30), and C (80:20). The best performance was obtained for C (80:20), with moisture 7.40%, volatile matter 9.56%, ash 4.47%, fixed carbon 85.95%, HHV 6,716.88 cal g⁻¹ (28.10 MJ kg⁻¹), and burn rate 0.10 g min⁻¹. All compositions satisfied SNI 01-6235-2000 limits for HHV (≥ 5,000 cal g⁻¹), VM (≤ 15%), and ash (≤ 8%); the moisture criterion (≤ 8%) was met by B and C. For context, SNI 1683:2021 (wood charcoal, not briquettes) imposes stricter thresholds; under these, C is closest to First-Quality ranges, while A and B fall short for several parameters. Overall, increasing the RSS (char) fraction produced briquettes with lower moisture and VM, higher fixed carbon and HHV, and steadier combustion suitable for household fuel.

Keywords

Renewable Energy Biomass Briquettes Rubber Seed Shell Acacia Sawdust SNI

Article Details

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright (c): Devia Gahana Cindi Alfian, I Gede Pande Naraya Sindhu, Fajar Paundra, Dicky Januarizky Silitonga, Andhyka Tyaz Nugraha (2025)
How to Cite
Alfian, D., Sindhu, I. G., Paundra, F., Silitonga, D., & Nugraha, A. (2025). Analysis of Biomass Briquettes Made from Rubber Seed Shells and Acacia Sawdust with Variation in Material Composition Percentage. INVOTEK: Jurnal Inovasi Vokasional Dan Teknologi, 25(2), 97-108. https://doi.org/https://doi.org/10.24036/invotek.v25i2.1209

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