Martynov et al. studied three different pressurisation pathways for different CO 2 -rich streams from pure CO 2 and post-combustion capture to increasing content of impurities including pre-combustion capture to different oxy-fuel capture purities. The compression pathways included a multi-stage compression pathway, a shock-wave compression pathway, and a compression/cooling/liquefaction/pumping pathway. All systems considered pressurisation from 15 bar to 151 bar with the latter case including liquefaction and pumping from 62 bar to the final pressure. It was found that compression power increased moderately for increasing impurity levels up to 4 v/v %. Further, increasing impurities up to v/v 15% results in significantly increasing power requirement. The same trend was observed for the required refrigeration compression power for liquefaction at 62 bar.