Economic evaluation of CO₂ pipeline transport in China
2012
Dongjie, Zhang | Zhe, Wang | Jining, Sun | Lili, Zhang | Zheng, Li
Carbon capture and sequestration (CCS) is an important option for CO₂ mitigation and an optimized CO₂ pipeline transport system is necessary for large scale CCS implementation. In the present work, a hydrodynamic model for CO₂ pipeline transport was built up and the hydrodynamic performances of CO₂ pipeline as well as the impacts of multiple factors on pressure drop behavior along the pipeline were studied. Based on the model, an economic model was established to optimize the CO₂ pipeline transport system economically and to evaluate the unit transport cost of CO₂ pipeline in China. The hydrodynamic model results show that pipe diameter, soil temperature, and pipeline elevation change have significant influence on the pressure drop behavior of CO₂ in the pipeline. The design of pipeline system, including pipeline diameter and number of boosters etc., was optimized to achieve a lowest unit CO₂ transport cost. In regarding to the unit cost, when the transport flow rate and distance are between 1–5MtCO₂/year and 100–500km, respectively, the unit CO₂ transport cost mainly lies between 0.1–0.6RMB/(tCO₂km) and electricity consumption cost of the pipeline inlet compressor was found to take more than 60% of the total cost. The present work provides reference for CO₂ transport pipeline design and for feasibility evaluation of potential CCS projects in China.
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