Longan Wood Charcoal

Specifications Details
Size Diameter Φ 20 – 80 mm, Length 50 – 250 mm
Fixed Carbon ~ 70%
Calorific Value ~ 
000 kcal/kg
Ash Content < 4%
Moisture < 5%
Burning Time ~ 3 hours

Packaging

• PP/BOPP Bags: 10 – 25 kg 
• PP/BOPP Small Bags: 3 – 7 kg 
• Carton Boxes: 3 – 10 kg 

OEM Service: Logo printing and packaging design according to customer requirements.

Supply Information

• Supply Capacity: 300 MT/month 
• Loading Capacity: 27 MT/40’HC 
• MOQ: 1 x 40’HC container 
• Payment Terms: TT (30% deposit) or L/C at sight 
• Delivery Time: 7 – 15 days 
• Loading Port: Ho Chi Minh Port, Vietnam 

Preferred Markets: Australia, New Zealand, Taiwan, Saudi Arabia, and other international markets.

In Vietnam, longan trees are widely cultivated in tropical and subtropical regions, especially in the Mekong Delta provinces such as Dong Thap, Vinh Long, Tien Giang, Ben Tre, Soc Trang, and several northern provinces including Hung Yen and Son La. The total longan cultivation area in Vietnam reaches tens of thousands of hectares and has remained stable for many years due to the high economic value of commercial longan fruits.
Longan trees typically have an economic cultivation cycle of approximately 10 – 20 years depending on farming conditions and productivity. During cultivation, longan branches are regularly pruned after each harvesting season to maintain tree growth and fruit productivity. In addition, old, diseased, or low-yield longan trees are gradually replaced with new varieties to improve economic efficiency for farmers. This periodic pruning and replanting process creates a relatively stable annual supply of longan wood materials.
Longan wood belongs to the medium-to-hard wood group, featuring relatively dense wood structure and higher wood density compared to many common fruit tree species. Fresh longan wood usually has a light yellow to light brown color with naturally high moisture content. Due to the relatively small trunk size and the presence of many knots and branches, longan wood is generally less suitable for furniture manufacturing or construction industries.
In practice, longan wood is mainly used as firewood or as raw material for charcoal carbonization. Thanks to its dense wood structure and relatively high wood density, longan wood after carbonization produces charcoal with good hardness, high heat output, stable burning performance, and lower smoke emission compared to many soft wood species. Longan charcoal is commonly used for BBQ grilling, barbecue restaurants, household charcoal stoves, and other applications requiring stable natural charcoal quality.
In traditional charcoal production areas in Southern Vietnam, longan wood is considered one of the common raw material groups thanks to its stable supply from specialized fruit farming regions. These raw materials mainly come from pruning activities, orchard renovation, and agricultural replanting processes, helping utilize agricultural by-products for natural charcoal production.
After harvesting and pruning, longan wood materials are freshly cut and processed into stick forms with an average length of approximately 500 mm and diameters ranging from 50 – 150 mm. Before entering the carbonization kilns, dry, decayed, or unsuitable wood pieces are carefully removed to ensure more stable finished charcoal quality during the production process.

Packaging

• PP/BOPP Bags: 10 – 25 kg 
• PP/BOPP Small Bags: 3 – 7 kg 
• Carton Boxes: 3 – 10 kg 

OEM Service: Logo printing and packaging design according to customer requirements.

Supply Information

• Supply Capacity: 300 MT/month 
• Loading Capacity: 27 MT/40’HC 
• MOQ: 1 x 40’HC container 
• Payment Terms: TT (30% deposit) or L/C at sight 
• Delivery Time: 7 – 15 days 
• Loading Port: Ho Chi Minh Port, Vietnam 

Preferred Markets: Australia, New Zealand, Taiwan, Saudi Arabia, and other international markets.

Overview
Natural wood charcoal is produced from suitable wood species (typically wood materials with limited value for advanced wood processing applications) such as Mangrove, Longan, Eucalyptus, Coffee Wood, Khaya, and various orchard wood species through a carbonization process under oxygen-limited conditions.
During this process, most moisture, natural oils, wood tar, and volatile organic compounds are removed, while the carbon content is retained to form natural charcoal.
The production process consists of multiple stages, including raw material preparation, carbonization, sorting, packaging, and quality inspection before shipment, ensuring that the final products meet technical requirements, commercial specifications, and international transportation standards.

Step 1. Raw Material Sourcing
Raw materials are selected from wood species suitable for charcoal production, including Mangrove, Longan, Eucalyptus, Coffee Wood, Khaya, and various orchard wood species.
Depending on the product category, the wood may originate from plantation forests, fruit orchards, or other appropriately managed raw material regions.

Step 2. Wood Preparation
The wood is cut into logs or billets suitable for the carbonization process. Typical dimensions are approximately 500 mm in length and 50–200 mm in diameter. Larger logs are further cut or split to achieve the required size range.
Standardizing the raw material dimensions helps improve carbonization efficiency and facilitates subsequent grading and packaging operations.
For charcoal production, freshly harvested wood is generally preferred, as it often produces stronger and more stable charcoal after carbonization.

Step 3. Kiln Loading
The prepared wood is loaded into the carbonization kilns manually or semi-manually.
Proper and uniform stacking ensures efficient heat and airflow circulation throughout the kiln during the production cycle while minimizing shifting, collapsing, or breakage of the material.

Step 4. Carbonization
This is the most important stage of the entire production process.
The kilns are designed with dedicated firing chambers that gradually increase the internal temperature through two main stages:
Stage 1 – Moisture Removal (150–200°C)
Free water and internal moisture are gradually removed from the wood. This stage essentially functions as a thermal drying process.
Stage 2 – Carbonization (350–400°C)
The temperature continues to rise, removing the remaining moisture, natural oils, wood tar, and volatile organic compounds. Under oxygen-limited conditions, the wood structure is gradually transformed into charcoal while the carbon content is retained to form natural wood charcoal.
Depending on the wood species, kiln design, kiln size, and environmental conditions, the carbonization process typically takes between 4 and 6 weeks.
This is the most important stage of the entire production process.
The kilns are designed with dedicated firing chambers that gradually increase the internal temperature through two main stages:
The average charcoal recovery rate ranges from approximately 18–25%, meaning that every 100 kg of raw wood typically yields around 18–25 kg of finished charcoal.

Step 5. Natural Cooling
After carbonization is completed, all kiln openings are completely sealed, allowing the charcoal to cool naturally. This is the final stage of the carbonization process.
Natural cooling helps stabilize the charcoal structure, minimize cracking, and prevent re-ignition when exposed to oxygen. The cooling period typically lasts between 1 and 2 weeks, depending on kiln size and construction.

Step 6. Sorting & Grading
After unloading from the kiln, the charcoal is sorted according to size, shape, and quality.
Products that do not meet the required standards, such as partially carbonized or under-carbonized pieces, are removed or reprocessed when appropriate.

Step 7. Processing & Packaging
Depending on customer requirements, the charcoal may be cut, split, crushed, or cleaned to remove any remaining bark before packaging.
Products are packed in PP bags, BOPP bags, paper bags, cartons, or other packaging formats according to customer specifications and target market requirements.

Step 8. Quality Control
Each production batch undergoes quality inspection before shipment.
Quality verification may include combustion testing after kiln unloading and laboratory analysis when requested by customers.
Inspection criteria typically include charcoal type, size, moisture content, hardness, and packaging specifications according to internal standards or customer requirements.

Step 9. Warehouse Storage
After packaging, finished products are stored for a minimum of 7 days in dry and well-ventilated warehouse conditions to ensure fire safety and maintain stable product quality prior to shipment.

Step 10. Container Loading & Export
Products are loaded into containers according to packaging specifications, customer requirements, and international maritime transportation standards.
After final inspection, the cargo is transported to the port and exported under the agreed international trade terms.