News

Page SEO Summary: This comprehensive guide explains what raw materials can be used for wood pellets—covering suitable woods, what to avoid, quality impacts, and sourcing guidance.

The quality of wood pellets starts with the raw materials. The right materials produce high-quality, low-ash, durable pellets. The wrong materials can damage equipment, produce poor pellets, and create safety issues.

This guide explains what raw materials can be used for wood pellets, what materials should be avoided, and how to choose the best materials for your production.

---

The Short Answer

Suitable Materials

Material	Suitability	Quality
Sawdust	Excellent	Best
Wood chips	Good	Very good
Wood shavings	Good	Very good
Clean wood waste	Good	Good
Bark	Moderate	Lower
Wood residues	Variable	Variable

The Golden Rule

Wood pellets should be made from 100% wood—no additives, no glue, no chemicals. The wood’s natural lignin acts as the binder.

---

Primary Raw Materials

1. Sawdust

Aspect	Detail
Source	Sawmills, wood processing
Quality	Excellent
Common	Most common raw material
Advantages	Consistent, already ground
Preparation	Usually needs drying only

2. Wood Chips

Aspect	Detail
Source	Forestry, wood processing
Quality	Good
Common	Common
Advantages	Abundant
Preparation	Needs grinding

3. Wood Shavings

Aspect	Detail
Source	Woodworking, furniture
Quality	Good
Common	Less common
Advantages	Clean
Preparation	Needs grinding

4. Bark

Aspect	Detail
Source	Sawmills, forestry
Quality	Moderate
Common	Common
Advantages	Abundant
Preparation	Needs grinding
Limitations	Higher ash, lower quality

5. Clean Wood Waste

Aspect	Detail
Source	Construction, demolition
Quality	Variable
Common	Common
Advantages	Low cost
Preparation	Sorting, grinding
Limitations	Quality variable

---

Softwood vs Hardwood

Comparison

Aspect	Softwood	Hardwood
Examples	Pine, spruce, fir	Oak, beech, birch
Lignin content	Higher (25-30%)	Lower (20-25%)
Pellet quality	Excellent	Very good
Ash content	Lower (0.3-0.8%)	Higher (0.5-1.0%)
Processing ease	Easier	More difficult
Availability	Widely available	Widely available

Which is Better?

Factor	Recommendation
For premium pellets	Softwood
For residential heating	Softwood
For industrial use	Either
For local availability	Whatever is available
For cost	Whatever is cheaper

Mixing Softwood and Hardwood

Mix	Effect
Softwood only	Best quality, lowest ash
Hardwood only	Good quality, higher ash
50/50 mix	Balanced properties
Hardwood + softwood	Better binding + higher energy

---

Material Requirements

Moisture Content

Moisture Level	Effect	Requirement
<10%	Poor binding	Too dry
10-12%	Optimal	Best quality
12-15%	Acceptable	Still good
>15%	Requires drying	Not suitable

Particle Size

Particle Size	Effect	Requirement
<2 mm	Good flow	Optimal
2-5 mm	Acceptable	Standard range
>5 mm	Poor pellets	Too coarse

Bark Content

Bark Content	Effect	Recommendation
<5%	Best quality	Premium pellets
5-10%	Acceptable	Standard pellets
>10%	Lower quality	Industrial only

---

Unsuitable Materials

What NOT to Use

Material	Why Not	Risk
Treated wood	Toxic emissions	Health and safety
Painted wood	Toxic emissions	Health and safety
MDF/particleboard	Glue content	Toxic emissions
Plastic	Toxic emissions	Health and safety
Metal	Equipment damage	Damage
Stones	Equipment damage	Damage
Paper	Low quality, high ash	Quality
Cardboard	Low quality, high ash	Quality
Textiles	Contamination	Quality

Why Treated Wood is Dangerous

Chemical	Risk
CCA (chromated copper arsenate)	Arsenic emissions
Creosote	Toxic fumes
Paint/coatings	Heavy metals
Glues	Formaldehyde

---

Sourcing Raw Materials

Where to Get Materials

Source	Material	Cost
Sawmills	Sawdust, chips	Low to moderate
Wood processing	Shavings, offcuts	Low to moderate
Forestry	Chips, residues	Low
Construction	Clean wood waste	Variable
Furniture makers	Shavings, offcuts	Low

Qualities to Look For

Quality	What to Check
Consistency	Regular supply
Moisture	Consistent moisture
Cleanliness	No contaminants
Particle size	Suitable size
Bark content	Low for premium

---

Quality Impact

How Raw Materials Affect Pellet Quality

Material Factor	Quality Impact
Wood species	Ash content, durability
Moisture	Durability, efficiency
Bark	Ash content, color
Contaminants	Quality, safety
Particle size	Durability, consistency

Quality Grades

Grade	Ash	Moisture	Best Raw Material
Premium (ENplus A1)	<0.7%	<10%	Softwood, bark <5%
Standard (ENplus A2)	<1.2%	<10%	Mixed wood, bark <10%
Industrial (ENplus B)	<2.0%	<10%	Various wood

---

Sustainability Considerations

Sustainable Sourcing

Practice	Benefit
Use waste materials	Reduces waste
Certified sources	Sustainable forestry
Local sourcing	Reduced transport
Recycling	Circular economy

Certifications

Certification	Meaning	Importance
FSC	Sustainable forestry	High
PEFC	Sustainable forestry	High
ENplus	Pellet quality	Market access

---

Procurement Checklist

Material Assessment

• □ Material type identified
• □ Moisture content measured
• □ Bark content assessed
• □ Contaminants checked
• □ Particle size suitable

Quality Requirements

• □ Target pellet grade defined
• □ Ash content target set
• □ Moisture target set
• □ Durability target set

Supply Assessment

• □ Supply availability confirmed
• □ Cost confirmed
• □ Seasonality considered
• □ Storage capacity confirmed

---

Frequently Asked Questions

1. What raw materials are used for wood pellets?

Sawdust, wood chips, wood shavings, and clean wood waste are the primary raw materials. Premium pellets are made from 100% wood.

2. Is softwood or hardwood better for pellets?

Softwood is generally better for premium pellets due to higher lignin content and lower ash. Hardwood also produces good pellets.

3. Can I use bark for wood pellets?

Bark can be used but increases ash content. For premium pellets, bark content should be <5%. For industrial pellets, higher bark content is acceptable.

4. Why can’t I use treated wood?

Treated wood contains chemicals that release toxic fumes when burned. It is unsafe for use in wood pellets.

5. What moisture content is needed?

Wood material should have 10-12% moisture for optimal pelletizing. Higher moisture requires drying.

6. What is the best wood for pellets?

Softwood like pine and spruce produce excellent pellets with low ash content. The best wood depends on local availability.

7. Can I mix different woods?

Yes. Mixing softwood and hardwood can provide balanced properties. Softwood provides better binding; hardwood adds energy.

8. How do raw materials affect pellet quality?

Raw materials affect ash content, durability, energy content, and color. Clean, dry, low-bark wood produces the best pellets.

---

About the Author

Zhang Wei – Senior International Sales Engineer, Shandong Changsheng Machinery Co., Ltd.

Zhang Wei has over 12 years of experience in the biomass and feed pellet mill industry, with a background in mechanical engineering and international project execution. He has helped clients across Southeast Asia, the Middle East, Africa, Europe, and Latin America select and source raw materials for pellet production.

With hands-on experience in both the manufacturing workshop and client-side operations, Zhang brings practical insights into successful pellet production—from raw material selection to finished pellets.