Petcoke is a solid carbon byproduct of the oil refining process available in various grades. Both have been linked to discoloration in bulk carrier holds. While the cleaning techniques are identical, one requires an adequate protective barrier to prevent the grip from greasy residue.
Petroleum coke is a vital and precious commercial commodity. It is used in various applications such as fuels, aluminum production, and other goods such as steel, paint, glass, and fertilizers. In specific sectors, petcoke is also utilized as a fuel. In addition, it is employed in cement kilns and for power generation.
Petcoke, also known as Petroleum Coke, is commonly available in two forms. The Green Delayed Petcoke or Green Petcoke with Calcined Petcoke is one of them. Today, we’ll look at the distinction between the two in greater depth.
Green Delayed Petcoke
Green Delayed petcoke is a byproduct of liquid fraction treatment in Delayed Coking Units. Green coke refers to the raw coke that comes out of the coke. The term “green” in this context denotes “unprocessed.” As a result, it is also known as raw coke at times.
Green coke is a low-fixed-carbon, generally inert substance. This is because it includes 15-20% residual hydrocarbon solids. These leftover hydrocarbon granules cause discoloration in cargo holds that is difficult to remove. If they are allowed to grow over subsequent cargos, getting rid of them becomes considerably more difficult.
Calcined Petcoke
Calcined Petroleum Coke (CPC) or Calcined Petcoke is a byproduct of petroleum coke calcination. It is created at a crude oil refinery’s coker unit and supplied worldwide by China Calcined Petroleum Coke Exporter. CPC is a rigid yet brittle substance that can be coarse or granular. It has a high fixed carbon percentage and a low ash content. It has almost little residual hydrocarbons or moisture. As a result, it is inert and safe to hold. Nonetheless, it produces discoloration and necessitates thorough cleaning of the grip to remove all leftover residues. Calcined Petroleum Coke Exporter ensures to make it from crude oil.
Composition of Petcoke
The nature of the petroleum feedstock determines the precise chemical composition of Petcoke. Nonetheless, it is mainly composed of carbon. Impurities in Petcoke include residual hydrocarbons, sulfur, nitrogen, nickel, and other heavy metals in elemental form. These impurities exist as a hardened residuum trapped inside coke’s carbon matrix.
| Composition By Weight % | Green Delayed Petcoke | Calcined Petcoke |
| Carbon | 80 to 95 | 98 to 99 |
| Hydrogen | 3 to 5 | 0 to 1 |
| Nitrogen | 0.1 to 0.5 | 0.22 |
| Sulfur | 0.2 to 6 | 1.20 |
| Volatile Matter | 5 to 15 | 0.2 to 0.8 |
| Ash | 0.1 to 1 | 0.02 to 0.7 |
| Density | 1.2 to 1.6 | 1.9 to 2.1 |
Uses of Green Delayed Petcoke
Around 80% of petcoke generated worldwide is “fuel-grade.” As a result, it is used to create energy and fuel in cement kilns. To summarize, Green Delayed Petcoke is mainly utilized as a fuel.
Uses of Calcined Petcoke
- Making Smelting Anodes – Smelting anodes are created from calcined petcoke. It is the only economically viable approach known. The resulting anodes have excellent electrical conductivity as well as extraordinary resistance to physical and chemical deterioration inside the smelter.
- Paint and Colorings – Titanium dioxide is a mineral used to replace lead in paints. It’s also used in food coloring, plastics, and sunscreen. Calcined Petcoke is used to produce this TiO2.
- Paper- Gassing of Paper Ammonia and urea ammonium nitrate are produced when Petcoke is calcined. These are then used to make pulp and, eventually, paper. TiO2 derived from calcined petcoke is also used to whiten paper.
- Fertilizer – Ammonia and urea ammonium nitrate, which are created by gassing Calcined Petcoke, are utilized in the production of fertilizers.
- Manufacturing glass and brick- Calcined Petcoke is used to manufacture bricks and glass because it contains very little ash. As a result, it is a popular material among brick and glass makers.
- Steel Production – Calcined Petcoke can be used to partially replace metallurgical coal as a feedstock for coke oven batteries. It is also a partial substitute for pulverized coal used directly in blast furnaces. A Calcined Petcoke known as Needle Coke (named after its needle-like crystal structure) is used to make electrodes for EAF or Electric Arc Furnace steel manufacturing. Needle Coke cannot be replaced because no other substance possesses an equivalent combination of electrical conductivity and other physical qualities.
Petroleum coke exporter ensures that petcoke is produced while refining all oil types (light/heavy crudes). A barrel of crude oil yields various different products in addition to diesel, gasoline, and jet fuel. One of them is petroleum coke. It is by no means a novel product. It has instead been manufactured since the 1930s. China Calcined Coke Exporter and China Calcined Petroleum Coke ensure to utilize petcoke in various industries, including the production of steel, paint, glass, and fertilizers. Fuel-grade Petcoke is used in cement kilns, power generating, and other sectors as a combustion fuel. To summarize, Petroleum Coke is a valuable and necessary substance regardless of its form.
