Capture of Carbon Dioxide

CO₂ Capture in CCUS refers to the separation of CO₂ from a stream containing CO₂, CO₂ treatment and purification, and compression or liquefaction to the required level for transportation.

Types of CO₂ Capture

There are several types of capture, generally referred to by the inlet location of the CO₂ containing stream. There are two primary groups:

In power and combustion-related industries, there are three primary types of capture:

Types of Capture in Power and Combustion Related Industries
Type	Description
Post-Combustion Capture	Extracts CO₂ from a stream after a combustion chamber, such as in a natural gas power plant.
Pre-Combustion Capture	Extracts CO₂ from a stream before a combustion chamber, such as in a gasification power plant.
Oxy-Combustion Capture	Extracts CO₂ from a stream after a combustion chamber with a specialised system which uses oxygen instead of combustion air.

In non-combustion capture, there are two primary types of capture:

Types of Capture in Non-Combustion capture
Type	Description
Industrial Separation Capture	Extracts CO₂ from a stream containing both CO₂ and non-CO₂ gases, with no combustion in the process stream up or downstream of the removal point.
Inherent Capture	Extracts CO₂ from a stream containing primarily CO₂, with no combustion in the process stream up or downstream of the removal point.

A capture technology is a process that is used to extract CO₂ from a CO₂-containing stream.