🌿 Can You Make High-Efficiency Biomass Pellets Using Just Napier Grass and Coconut Shell?

Creating biomass pellets using only Napier Grass (75%) and Coconut Shell (25%) is not only possible — it’s also efficient when processed correctly. This blend offers a balance between ease of pelletization, good energy output, and moderate ash content.

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🔬 Estimated Properties of Napier Grass (75%) + Coconut Shell (25%) Pellet

Property	Value Range	Notes
Ash Content (%)	6.5 – 7.5%	Napier (5–8%), Coconut Shell (1.5–2%)
GCV (kcal/kg)	4200 – 4400	High calorific output with clean burn
Carbon Content (%)	45 – 48%	Enhanced by coconut shell’s lignin-rich structure
Volatile Matter (%)	68 – 72%	From Napier – helps ignition
Density (kg/m³)	650 – 700	Ideal for transport and storage
Pellet Durability	Good	Coconut Shell adds mechanical strength
Moisture Feed Limit	12–15%	Final pellet should be <10% moisture

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✅ Why This Blend Works

• Napier Grass: Excellent binder, high volatile content.
• Coconut Shell: Improves energy value and pellet hardness, reduces ash.

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🔁 Optional Optimization – Two-Ingredient Tweak

For better results:

• Napier Grass: 65–70%
• Coconut Shell: 30–35%

Improved Results:

• Ash Content ↓ to ~6%
• GCV ↑ to ~4500 kcal/kg
• Durability ↑ for industrial usage

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⚙️ Essential Equipment

• Dewatering Screw Press (for wet Napier)
• Flash or Rotary Dryer
• Hammer Mill (<3 mm screen)
• Ribbon Mixer
• Ring Die Pellet Mill (1:6 to 1:8 ratio)
• Counterflow Cooler

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💡 Best Practices

• Uniform grinding (<3 mm)
• Consistent moisture (12–15%)
• Final moisture <10%
• Use clean, sorted coconut shell (no husk)

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🔥 Optimized Mix-Match Suggestions (if using 3 materials)

🔹 Option 1 (High Efficiency)

• Napier Grass: 60%
• Coconut Shell: 20%
• Wood Sawdust: 20%
  👉 GCV ↑ 4400–4600 kcal/kg | Ash ↓ 5.5–6%

🔹 Option 2 (Budget Friendly)

• Napier Grass: 70%
• Coconut Shell: 20%
• Groundnut Shell/Corncob: 10%
  👉 Balanced cost | Ash ~6.5% | GCV ~4400 kcal/kg

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