LAUSR

The issue of CO2 hydrate has drawn attention in terms of the pipeline transporting and injection process of the captured CO2. Designing a pipeline network under onshore or offshore conditions for transporting CO2 and designing a pipeline for injection to a reservoir requires knowing the exact CO2 thermodynamic status for safety in the pipeline and for controlling operational facilities, including compressors and gas boosters. In the present study, a model for estimating the in-tube heat-transfer coefficient for a CO2-hydrate gas mixture was developed by considering the significant effects of the temperature difference between the CO2-hydrate crystallization temperature and the actual operational temperature on the heat transfer coefficient. In addition, a pressure drop model for a CO2-hydrate gas mixture was developed by introducing a pressure ratio of P/Pcrit and the Breault and Mathur model, which was developed for estimating a pressure drop for solid particles and gas flow in a pipeline.