Performance of biomass pyrolysis stove from bus wood waste with varying donut briquette compaction pressures
Abstract
Bus wood (Melaleuca viridiflora) is an underutilized sawmill residue in the Merauke region of South Papua. Converting this residue into densified fuel can support local biomass utilization while reducing unmanaged wood waste. This study evaluates the effect of donut-briquette compaction pressure (30, 40, and 50 bar) on the thermal behavior of a multilayer annular pyrolysis stove. The stove was instrumented with nine K-type thermocouples arranged at outer, middle, and inner radial positions across three vertical layers. Temperature profiles were recorded at 2 min intervals, and thermal output was assessed using Water Boiling Tests (WBTs; n = 16 per pressure). The inner-edge sensors produced the highest temperatures, with transient peaks approaching 900-950 °C, whereas middle-position sensors generally operated between about 400 and 750 °C. Outer-edge sensors remained cooler, although the upper-layer outer sensor reached approximately 450 °C. Mean WBT energy rates were 3.79 ± 0.23, 3.89 ± 0.17, and 3.92 ± 0.26 MJ h⁻¹ for 30, 40, and 50 bar, respectively. One-way ANOVA indicated no significant difference in mean energy rate among the three pressures (p = 0.215). The 40-bar condition showed the lowest coefficient of variation in WBT energy rate and a comparatively sustained intermediate-temperature response. These results indicate that compaction pressure affects temperature evolution and stability more strongly than mean useful energy rate within the tested range.
Keywords
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References
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Details
Primary Language
English
Subjects
Renewable Energy Resources
Journal Section
Research Article
Authors
Daniel Parenden
*
0000-0003-3539-0726
Indonesia
Mujiyono Mujiyono
This is me
0000-0002-9208-8913
Indonesia
Didik Nurhadiyanto
This is me
0000-0003-0643-0776
Indonesia
Eddy Rusly
This is me
0009-0002-4869-9474
Indonesia
Early Pub Date
October 21, 2026
Publication Date
-
Submission Date
May 11, 2026
Acceptance Date
October 7, 2026
Published in Issue
Year 2026 Number: Advanced Online Publication