Carbon capture, utilization, and storage (CCUS) technologies are increasingly viewed as crucial for mitigating climate change. However, the safe and efficient transportation of captured CO2 via pipeline remains a critical concern due to the risk of potential leaks and ruptures.
This study, published in the Journal of Pipeline Science and Engineering, investigates the potential hazards associated with CO2 pipeline leaks by combining full-scale experimental data with advanced diffusion modeling.
The research team from China University of Petroleum (East China) conducted a series of groundbreaking full-scale burst tests on CO2 pipelines.
These tests provided invaluable insights into the fracture behavior of pipelines under various conditions and the subsequent release of high-pressure CO2.
Lead author Professor Yuxing Li emphasized the potential severity of CO2 leaks, highlighting their potential to cause significant environmental and ecological damage:
“Due to the positive throttling effect of CO2 and the toxicity of high concentrations of CO2, it can frostbite or even asphyxiate plants and animals in the vicinity of the leakage area. Therefore, studying the leakage characteristics of supercritical and concentrated-phase CO₂ and predicting its potential hazard distance is significant,” Li said.
The study focused on understanding how factors such as initial temperature and pressure within the pipeline influence the dispersion of leaked CO2.
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By analyzing the experimental data, the researchers developed a sophisticated diffusion model that accurately predicts CO2 concentration levels at varying distances from the leak site.
This research has significant implications for the safe and responsible deployment of CCUS technologies.
The findings provide a robust framework for accurately predicting hazard distances following CO2 pipeline leaks, enabling more effective risk assessment and mitigation strategies.
This includes optimizing pipeline design, implementing robust leak detection systems, and developing emergency response plans to minimize the impact of potential incidents.
