There is great interest in the development of CO2 capture technologies to have the most cost-efficient solutions. An important category being post-combustion technologies that can be retrofitted to almost any form of industrial emissions. There are currently substantial R&D efforts ongoing to develop a range of post-combustion technologies. There is obviously great interest in understanding the relative potential of different post-combustion technologies and to understand which technology is most suited for a specific industrial setting. This paper will summarize the status of different technologies.

There are a few issues that one must be aware of when assessing the potential of different technologies. Different capture technologies are at different stages of development. This makes direct comparisons on cost and performance difficult. There are also several KPIs that must be considered when looking at the potential of a technology. This includes energy demand and capture rates, but also issues such as CO2 product purity, plot space, utility requirements and suitability for transient operation.

The post-combustion technologies are absorption, adsorption, membranes and cryogenic separation. In addition, there are hybrid solutions. The strengths and weaknesses of the different technologies will be addressed. There are for example notable differences in which CO2 content in flue gas the capture technologies are best suited for. The Technology Readiness Level of each technology will be discussed and areas for further improvement will be addressed.