Evaluation of CO2 Transport Design Via Pipeline in the CCS System with Various Distance Combinations

Abstract

Carbon dioxide transportation plays an important role in the CCS system. The pipeline is the most economically viable for CO2 transport medium. In this paper, the design of the CO2 pipeline is systematically evaluated from a technical and economic aspect. Four transport process conditions include gaseous transport, liquid transport, dense phase transport, and supercritical transport will be assessed to obtain the most feasible transport design. A supercritical phase has an advantage when to be applied for long-distance and large-scale CO2 transportation. In the CCS network, the distance between source and sink points may vary. The variation in the distance and transport capacity make a supercritical phase not an effective pipeline transport condition. The proposed methods to determine the optimal design of onshore pipelines with a projected CO2 flow rate are presented in this paper. The methods are based on the simple correlations developed from a wide range of generic cases of CO2 transport. The optimum design is identified from the minimum total annual cost. The result shows that the pipeline design in the CCS network can be performed in the liquid phase when the distance is lower than 100 km.