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How to Select Compression Ratio for Different Biomass Materials
TIME:2026-03-10 15:43:59 WRITER：JINAN GLOBAL MACHINE MANUFACTURER
Biomass materials vary in composition, mainly in the content of lignin and cellulose, which directly determines the suitable compression ratio for pelletizing. Materials with higher specific gravity (heavier bulk weight) have higher lignin content. Lignin provides excellent bonding performance, so these materials can be formed into pellets with a smaller compression ratio.
On the contrary, materials with low lignin content need a larger compression ratio.With the same material fineness, the higher the bulk density of the material, the smaller the compression ratio should be.
The above rule only applies to materials with negligible or zero sugar and oil content.
Both sugars and oils have natural adhesiveness without needing external activation, so their presence will change the compression ratio requirement:
Higher sugar content means a smaller required compression ratio (e.g. corn stover);Higher oil content theoretically requires a smaller compression ratio, but the thermal expansion of oils at 80-100°C will cause uncertainty in the final compression ratio selection.
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