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Experimental study on the leakage temperature field of buried CO2 pipelines

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Abstract

The leakage of small holes in the buried CO2 pipeline is not easy to detect, which leads to the problem of the inability to accurately trace the source of the pipeline repair in the later stage. This paper designs and builds an experimental system to simulate the leakage of buried CO2 pipelines and conducts experiments on the leakage of small holes in buried CO2 pipelines to investigate the changes in the surrounding soil temperature when they leak. The results showed that the type of movement of CO2 in porous media after it is released from the leak is “funneling.” At a distance of about 50 mm from the horizontal, the temperature difference in the horizontal surface is smallest at the 50 cm closest to the vertical distance of the leak, while at a distance of 225 mm from the horizontal, the temperature difference in the horizontal surface is largest at the 70 cm farthest from the vertical distance of the leak. The research results can provide a theoretical basis for the later development of technologies that can quickly locate the leakage points of buried CO2 pipelines and accurately determine their leakage status.

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Funding

This paper is supported by the National Key R&D Program of China (2002YFC30063), National Natural Science Foundation of China (12172053) and China Postdoctoral Science Foundation (grant number 2022M710390).

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Contributions

Zhenyi Liu: contributed to the conception of the study; Zihao Xiu: wrote the manuscript; Yao Zhao: performed the data analyses and wrote the manuscript; Mingzhi Li: guided the experiment; Pengliang Li: guided the experiment; Peng Cai: checked the full paper; Yizhen Liang: checked the full paper.

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Correspondence to Yao Zhao.

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The authors declare no competing interests.

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Liu, Z., Xiu, Z., Zhao, Y. et al. Experimental study on the leakage temperature field of buried CO2 pipelines. Environ Sci Pollut Res 30, 70288–70302 (2023). https://doi.org/10.1007/s11356-023-27289-3

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  • DOI: https://doi.org/10.1007/s11356-023-27289-3

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