Much like the TRL, we have evaluated the CRI in the context of CCS. For instance, there are multiple installations of amine absorption, and hydrogen production from syngas worldwide for industrial applications. However, they do not contribute to the market status of these technologies for CCS. Some capture technologies have achieved TRL 8 or 9 with high CRI. These include absorption, for both post-and pre-combustion capture, and adsorption for precombustion capture (Table ). Direct air capture (DAC) is in a unique position. It has been able to reach a TRL of 7 (and CRI of 2) due to significant financial support from government bodies, which has resulted in "perceived maturity"; although there are still many aspects that require further development. Thus, it is still to early to pick a "winning" DAC technology as there many implementations of DAC that have not yet been explored.