Natural Flake Graphite
An overview of flake graphite, including its familiar uses, natural formation, platy structure, mining and processing methods, purity considerations, and commercial size grades.
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Calcined Petroleum Coke Materials (CPC)
High-carbon, non-graphitic carbon engineered for foundry, drilling, cathodic protection, and industrial performance applications.
Calcined Petroleum Coke (CPC) is a high-purity carbon material produced through the controlled carbonization and calcining of petroleum refinery by-products. The result is a dense, thermally stable, non-graphitic carbon with high fixed carbon content and consistent performance across foundry, drilling, cathodic protection, and industrial applications.
Calcined Petroleum Coke (CPC)
Petroleum coke begins as a complex hydrocarbon refinery by-product composed of high molecular weight hydrocarbon species. Through delayed coking and subsequent calcining, this hydrocarbon material is transformed into a nearly pure carbon structure.
All petroleum coke originates from a hydrocarbon parent material. During processing:
- Delayed Coking – Heat is applied in a delayed coking furnace, initiating carbonization.
- Coke Drum Formation – Significant hydrocarbon character is removed as the material polymerizes and solidifies.
- Calcining – Final carbonization occurs at approximately 1300–1400°C (2300–2500°F), completing the transformation into stable carbon.
Petroleum coke fresh from the coke drum is called green coke. Although highly carbonized compared to its refinery feedstock, green coke still contains residual hydrocarbon character, primarily hydrogen, oxygen, and minor sulfur and nitrogen atoms attached to the carbon skeleton. Calcining removes this remaining organic character and produces a material that is almost entirely carbon.
Properties
Major Carbon Properties
Calcined Petroleum Coke offers consistent composition and high-carbon performance characteristics.
- High carbon content (>98%)
- Virtually free of hydrocarbons and moisture
- Low volatile matter
- High thermal stability
- Good electrical conductivity (non-graphitic)
- Controlled particle size availability
- Low sulfur and low metals options available
- Cost-effective carbon source
Applications
Calcined Petroleum Coke Applications
CPC is used in applications requiring high carbon content, thermal stability, electrical conductivity, and controlled reactivity.
Casting
Used in casting and metallurgical systems where high-carbon additions improve metal chemistry and process control.
Drilling
Used in lost circulation materials (LCM) to minimize seepage and fracture losses during drilling operations. Available in multiple particle sizes for seepage control, fracture bridging, and lubrication.
Cathodic Protection Systems
Used as coke breeze backfill in corrosion prevention systems for pipelines and infrastructure.
Lubricants & Greases
Provides a reliable carbon source for custom-engineered industrial formulations.
How It Works
Carbonization & Calcining Process
Petroleum coke production is fundamentally a carbonization process.
- The hydrocarbon parent material is thermally cracked in the delayed coking furnace.
- In the coke drum, significant hydrocarbon character is removed as carbon-rich solids form.
- Green coke, although carbonized, still contains residual hydrogen, oxygen, sulfur, and nitrogen.
During calcining (1300–1400°C):
- Volatile hydrogen and oxygen are driven off.
- Organic and hydrocarbon character is eliminated.
- Loosely bonded heteroatoms are significantly reduced.
- The material becomes fully carbonized and thermally stable.
Post-calcined coke retains essentially no hydrocarbon or organic character. Except for minor sulfur and nitrogen bonded within the carbon structure, the product is a highly stable carbon material. Calcining represents one of the most significant industrial applications of large-scale carbonization technology.
WHY ASBURY
Your Global Supply Partner of Calcined Petroleum Coke Materials
Asbury Advanced Materials is a global supplier of high-quality Calcined Petroleum Coke products, providing standard and specialty grades, custom blends, and technical expertise to support foundry, oilfield, cathodic protection, polymer, and industrial applications.
Production facilities and strategically located warehouses support just-in-time delivery worldwide. CPC products are available in multiple packaging formats, including small bags and super sacks, to meet project logistics requirements.
Decades of Materials Expertise
Deep experience across carbon, graphite, and specialty materials—supporting complex, real-world applications.
Technical & Manufacturing Depth
Knowledgeable teams who understand material behavior, processing requirements, and application constraints.
Consistency, Quality & Control
Reliable materials processed to meet demanding specifications, batch after batch.
Global Reach & Supply Reliability
A diversified sourcing and distribution network designed to support customers wherever they operate.
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