Coke oven gas compressors applications

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Coke Oven Gas (COG) is a byproduct generated during the production of coke from coal in coke ovens, primarily in the steel industry.

What is Coke Oven Gas?

Coke Oven Gas is produced when coal is carbonized in the absence of air at high temperatures (around 1000°C) in coke ovens. This process drives off volatile components, leaving behind solid coke and releasing a mixture of gases.

Composition

COG typically contains:
Hydrogen (H₂) – 50–60%
Methane (CH₄) – 25–30%
Carbon monoxide (CO) – 5–10%
Carbon dioxide (CO₂) – 2–3%
Nitrogen (N₂) – 2–5%
Trace amounts of ammonia (NH₃), hydrogen sulfide (H₂S), and tar vapors

For Challenging Applications

Coke oven gas (COG) is produced in coke production plants and, when treated, can be a clean fuel source.
Fuel: Used as a fuel in steel plants for heating and power generation.
Chemical feedstock: Hydrogen and methane can be extracted for use in chemical processes.
Electricity generation: In gas engines or turbines.
COG can be a challenging gas to compress due to its composition.
COG must be cleaned to remove tar, ammonia, and sulfur compounds before use to minimize environmental impact and equipment corrosion.

Coke Oven Gas

Coke oven gas is a by-product of industrial coke production from coal. The gas is created when coking coals are distilled in a high temperature in the absence of oxygen. This usually occurs in coke ovens or furnaces. Coke oven gas mainly consists of hydrogen, methane, and a small amount of carbon, nitrogen, and carbon monoxide. Coke oven gas is a valuable by-product and has many industrial uses.

Many modern coke plants provide coke oven gas treatment as part of their operation as it is an environmentally-friendly way to create clean fuel.

Coke Oven Gas Applications

Compression of coke oven and blast furnace gas
Compression of synthesis gases

Wittig COG Gas Compressors

Wittig L & RVA series compressors are industry-leading oil lubricated rotary vane compressors. These highly robust machines can withstand even the most adverse conditions and guarantee process reliability and energy efficiency, even when handling volatile gases. They are a tried & tested solution in the field of coke oven gas compression.

Wittig L-GK

Wittig L-GK gas compressors for the compression of coke oven gas are available in sizes ranging from 20 to 100 with a capacity from 119 to 540 m³/hr and with operating pressures from 1.5 to 3.5 bar (abs).

The L-GK series are oil-lubricated compressors which are air cooled by a separate cooling air blower located in the acoustic hood. They are driven by a high performing built-in electrical motor with V-belt drive.

This series of compressors is suitable for handling untreated gases such bio, sewage and landfill gases. They are small, compact units which have been designed so that they can be installed without the need for a foundation. The components can simply be mounted on a main frame with rubber-metal bonded elements, designed to reduce vibrations. The electrical control panel is wired to terminal boxes.

L-GK 20-100

Fresh oil-lubricated rotary vane compressors with V-belt drive.

Capacity from 119 to 540 m³/h
Pressure from 1.5 to 3.5 bar (abs.)

Wittig RVA-G

The RVA G series is oil-lubricated with direct drive and capacity from 505 to 5,262 m³/hr. Its operating pressure is from 1.5 to 3.5 bar (abs).

It is a water-cooled model where the heat generated during operation is removed by cooled flowing water that travels through the compressor housing. The RVA-G series is suitable for processing and compressing purified gases. Plus, perfect lubrication with oil film between vanes and housing means no wear and outstanding operating reliability.

RVA 058-610

Fresh oil-lubricated rotary vane compressors with direct drive.

Capacity from 505 to 5,262 m³/h
Pressure from 1.5 to 3.5 bar (abs.)

Gas Compressor for Coke Oven Gas