In the context of rising prices of traditional fuels, cashew shell residue is emerging as a “golden fuel” for industrial boilers in Vietnam.
Produced from by-products of the cashew processing industry, cashew shell residue offers a high calorific value (> 4,600 kcal/kg), low moisture content (< 12%), and low ash content (< 3%), enabling efficient combustion, strong heat generation, and significant cost savings.

1. What is cashew residue?

Cashew shell residue (also known as cashew shells after oil extraction) is a by-product of the cashew processing industry. – one of Vietnam’s strongly developed agricultural industries. After extracting cashew nut shell liquid (CNSL), the remaining shell residue contains a high carbon content and can be utilized as High-energy biomass fuel.

2. Energy Characteristics of Cashew Shell Residue

Cashew shell residue is considered one of the biomass fuels with a high calorific value, thanks to its dense organic composition and stable combustion characteristics. Technical Specifications:

• Calorific Value: >4,600 kcal/kg
• Moisture Content: < 12%
• Ash Content (Ash): <3%
• Cashew shell residue is widely used in industrial boilers, especially in industries such as brick manufacturing, steel production, and animal feed processing.

3. Advantages of Using Cashew Shell Residue as Biomass Fuel

• High combustion efficiency: Generates strong heat output, helping reduce fuel consumption.
• Competitive pricing: 2,000,000 – 2,600,000 VND/ton – significantly lower than wood pellets.
• Stable supply: Vietnam is one of the world’s largest cashew exporters, ensuring a year-round supply of cashew processing by-products.
• Environmentally friendly: Reduces CO₂ emissions, contributing to the Net Zero 2050 target.

4. Important Notes When Using Cashew Shell Residue

• During combustion, cashew shell residue produces a characteristic odor from cashew shells.
• It is recommended to use an exhaust gas treatment system (chimney and dust filtration system) to ensure compliance with environmental standards.

5. AN NGUYEN PHAT – Cashew Shell Residue Manufacturer in Vietnam

With its factory located in Phuoc Long, Binh Phuoc, Vietnam, AN NGUYEN PHAT currently operates with a capacity of 6,500 tons/month, specializing in the production and supply of compressed cashew shell pellets and raw cashew shell residue for domestic and export markets. Commitment:

• Stable raw material supply with quality verified by KT3 Testing Center.
• Nationwide logistics services with on-time delivery assurance.
• Consulting and supporting businesses in implementing green fuel conversion solutions.

📞 Hotline: +84 973 116 191 📩 Email: annguyenphat.biomass@gmail.com