Dlamini et al. studied different pressurisation pathways for pipeline transport of CO 2 including both pure compression and sub-critical compression followed by cooling/liquefaction/pumping to the final delivery pressure. Pressurisation was from 4.6 barg in all cases. The effect of number of compression stages, cooling temperatures, pipeline back-pressure was investigated as well as different heat integration methods. It was concluded that for the compression/liquefaction/pumping pressurisation pathway, a liquefaction pressure of 45 bar was optimal using 3 compression stages (and a two-stage refrigeration process), whereas a compression only case with 8 stages was marginally better when the cooling in inter-stage coolers ocurred at 35 • C. When the cooling temperature was lowered to 25 • C and 10 • C, respectively, the subcritical compression/cooling/liquefaction/pumping become energetically more favorable with savings of 10% and 27% in work duty, respectively.