Simulation Of CO₂Diffusion Caused By Leakage On Pipeline

In recent years, the environmental problems are becoming more and more seriousbecause of excessive discharge of greenhouse gases, which is mainly composed of carbondioxide. Saving resources and reducing carbon emission is the main concern in the progressof economic development. China will be one of the primary countries which discharge themost carbon dioxide. This is because of the energy structure and of rapidly developingeconomy. At the same time, the technology of carbon dioxide capture and storage (CCS) cannot only reduce carbon emission, but also make use of the waste gas.Pipeline transporting is an important link of CCS technology because usually the captureand storage step is not completed at a same site. By now, few carbon dioxide transportingpipelines have been built. The knowledge on safety of pipeline has not been adequate. Theregularity of fluid diffusion and the risks when pipeline ruptures has not been gained. Theindustrial standards have not been published. All of this constrain the use and development ofCCS technology.This paper is mainly about the safety of carbon dioxide transporting pipeline, especiallyto study the process of gas diffusion when leakage occurs. In this paper, the property ofcarbon dioxide and the transporting technology by pipeline is summarized. The dangerousconcentration is confirmed. The transportation schemes are listed based on the project ofShengli oil field. The three type of modes-the block valves open, the block valves shuttingand wind blowing are simulated used software Fluent.The selected dangerous concentration is monitored. The different schemes are compared.The conclusion can offer reference to quantitative assessment on carbon dioxide transportingpipeline.