Developing Transient Model and Simulating the Effects of Soil Properties on a Small Hole Leakage and Diffusion Characteristics in the Buried CO2 Pipelines

Shang, Y, Xing, X, Chen, X, Yang, M, Shah, R ORCID: 0000-0002-3466-5110 and Pang, X (2025) Developing Transient Model and Simulating the Effects of Soil Properties on a Small Hole Leakage and Diffusion Characteristics in the Buried CO2 Pipelines. Energy & Fuels, 39 (23). pp. 11229-11243. ISSN 0887-0624

Text Developing Transient Model and Simulating the Effects of Soil Properties on a Small Hole Leakage and Diffusion Characteristics in the Buried CO2 Pipelines.pdf - Accepted Version Access Restricted until 3 June 2026. Download (2MB)

Abstract

Carbon dioxide (CO2) pipelines are subject to significant risk factors of leakage, primarily due to mechanical damage, corrosion, and third-party interference. The CO2 pipe leakage, which involves the intricate phase of the transition processes and is characterized by the pronounced fluctuations in the pressure and temperature, creates considerable challenges to the pipeline reliability and environmental safety. Therefore, a comprehensive analysis on the leakage and seepage diffusion in the buriedCO2 pipelines is essential for accurate risk assessment and decreasing the response time associated with the leak detection. This study develops a transient model to examine the small hole leakages’ behavior in the buried CO2 pipelines. By integrating the discharge model and seepage diffusion model coupled with the thermo-fluid−solid and multi physical fields, the study focuses on the dynamic variations in pressure, velocity, temperature, and concentration of the soil during the leakage. Additionally, this research examines the effects of soil properties, including porosity, permeability, and types with the CO2 leakage and seepage diffusion behavior. The key indicators such as Warning Alert Time (WAT), Temperature Detection Time (TDT), and Pipeline Brittle Range (PBR) are introduced to define the hazardous boundaries, providing a systematic framework for risk assessment. The findings demonstrate that the physical properties of the soil play a crucial role in determining the leakage behavior and hazardous range of the seepage diffusion in buriedCO2 pipelines. The developed transient numerical model helps to predict the dynamic characteristics of the leakage and seepage diffusion within the soil more effectively, offering a robust theoretical foundation and technical support for assessing the consequences of the CO2 leakage.

Item Type:	Article
Additional Information:	This document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy & Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.energyfuels.5c01069
Uncontrolled Keywords:	Carbon dioxide; Buried pipelines; seepage diffusion; characteristics; Soil properties; Numerical simulation; 0306 Physical Chemistry (incl. Structural); 0904 Chemical Engineering; 0914 Resources Engineering and Extractive Metallurgy; Energy; 4004 Chemical engineering; 4019 Resources engineering and extractive metallurgy
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Civil Engineering and Built Environment
Publisher:	American Chemical Society
Date of acceptance:	19 May 2025
Date Deposited:	16 Jun 2025 14:12
Last Modified:	03 Jul 2025 13:00
DOI or ID number:	10.1021/acs.energyfuels.5c01069
URI:	https://researchonline.ljmu.ac.uk/id/eprint/26595

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