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CO2 transport

Anette Mathisen

12/10/2009 1:40 pm

After the capture process the CO2 has typically a pressure of about 1.5 bar and a temperature of 40°C. Before transport to permanent storage, pre-treatment of the gas is needed to meet the transport requirements. The extent of pre-treatment and the methods used will depend on the transportation method.

CO2 can either be transported by ship/barge or pipelines. The transport solutions have different advantages depending on the transport volume, transport distance, flexibility demands and time of investment decision.

  • Today transport of CO2 by ship is preformed at 14 – 20 bar and the technology is well known. Regardless there are some uncertainties connected to low cost transport of large quantities of CO2.
  • Large scale transport by ship/barge will happen close to the triple point at 6 – 8 baro and -50°C.
  • Pipeline transport will happen between 80 and 150 bar, the pressure must be high enough to handle friction loss and fall in static pressure.

In order to overcome the pressure in the reservoir and to avoid operational problems like hydrate formation, the inlet conditions at the bore head is 200 – 300 bar and 15 – 20°C. CO2 is pumped to a pressure higher than the injection pressure and heated to ambient temperature before it is transported to the injection point.

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