LCS-FY2016-PP-06
Survey on the Carbon Capture and Storage process (Vol. 2):
The CO2 Capture Cost by the Membrane Separation and the CCS Cost of the Storage and the Injection
Summary
We analyzed CO2 capture cost by membrane separation technology in a coal gasification power plant. The CO2 capture cost is 1.5 ¥/kg -CO2 in case of a membrane of permeability 4×10-10m3 /m2/s/Pa and selectivity 125. It is cheaper than the capture cost of 3.9 ¥/kg-CO2 (LCS proposal paper (FY2015-PP-08)) incurred using the physical absorption method.
We also examined CCS cost with regards to CO2 injection into an aquifer. The CCS cost in the case of direct injection of CO2 liquefied at ambient temperature (20°C, 8 MPa) and transported by pipeline is 1.3 ¥/kgCO2 and in the case of injection of CO2 liquefied at low temperature (–20°C, 2 MPa) and transported by ship is 5.1 ¥kg-CO2.
The direct injection method of the gas liquefied at ambient temperature is thus preferable.