Use cases ·

What is pet coke and what types of pet 'coke are there?

Petroleom has multiple derivatives that are integrated into industries to improve and ensure processes, one of the most used is coke. Therefore, below we will explain what coke is and why it is positioned as an option for industrial processes of various types.

What is pet coke and what types of pet 'coke are there?

Petroleum has multiple derivatives that are integrated in industries to improve and ensure processes, one of the most used is coke. Therefore, we will explain below what coke is and why it is positioned as an option for industrial processes in various industries.

What is coke? Importance in the industry

Coke is a solid, porous residue resulting from the destructive distillation of coal.

Its transformation is derived from mineral coals, after having passed a plastic phase, as in the case of decomposition of bituminous coals in the absence of air or distillation of hard coal. Coke is used in the industry as:

  • The preparation of producer gas which is a mixture of carbon monoxide (CO) and nitrogen (N2).
  • Fuel and as a reducing agent in the smelting of iron ore in a blast furnace.

Coke characteristics

Coke has multiple characteristics that make it essential in different industrial processes. With the knowledge of what coke is, it is time to explain some characteristics of this waste:

  • Low ash index. This particularity and its calorific value make it an excellent alternative to replace coal.
  • High calorific value. It is a fuel that is easy to transport, provides more energy with less combustion and is highly competitive with coal or natural gas.
  • Reducer. It produces and regenerates gases for the reduction of iron oxides.

Types of coke

Now that we have established what coke is and its characteristics; we can focus on the types of coke. The type of coke can be determined according to its purity or transformation process. Now that it has been established what coke is and its characteristics, we can focus on the types of coke. The type of coke can be determined according to its purity or transformation process. Below we describe the most known for their commercial uses:

  • Needle coke: Also known as acicular coke, derived from crystalline petroleum used in steel production.
  • Calcined petroleum coke:From coking in a crude oil refinery. Used for aluminum, steel and titanium anodes.
  • Catalyst coke: Characterized by being a good fuel for electric generators, however, it contains a large amount of sulfur and volatile contents.  To solve the environmental and combustion problems that its refining may generate, it is necessary to capture the sulfur by means of gasification. In fact, it is a practice recommended by current emission standards in North America. It is characterized by having a low level of metals, with the purpose of being used for the manufacture of anodes.  In case of high levels of metals, the coke is not calcined and is used for burning (known as fuel grade coke).
  • Metallurgical coke: Used in the iron smelting industry. Used to obtain calcium carbide.
  • Negotiable coke: Semi-pure coal coke that can be used as fuel or for the manufacture of electrodes.