Integrated optimization model for CCS hubs and pipeline network design

Abstract In this study, we aim to increase net economic profit by utilizing a systematic approach to optimize the entire network via combining carbon dioxide (CO2) supply of carbon capture and storage (CCS) with CO2 injection of carbon sequestration. We consider a special type of network structure and simultaneously address the optimal location of the potential hubs. The continuous selection problem of the hub location brings practical difficulties to the model, both in terms of solution efficiency and model representation. In the case that the EOR (enhanced oil recovery) conversion level is time-varying, the decision-making variables—such as the hub location, pipeline size, and flow rate design—show different degrees of interplays, which brings great uncertainty to the final decision. We apply our framework to four instances of the CCS-EOR network design combined with the hub location selection problem to demonstrate the effectiveness of the model.