An experimental study on the flow characteristics during the leakage of high pressure CO 2 pipelines
Document Type
Journal Article
Publication Title
Process Safety and Environmental Protection
Publisher
Institution of Chemical Engineers
School
School of Engineering
RAS ID
30191
Abstract
High pressure pipeline transportation is dominant mode for economically transporting large amounts of CO 2 . However, potential leakage is one of the main risks associated with pressurized CO 2 pipeline transportation. Thus, to investigate the leakage behavior of high pressure CO 2 and to de-risk such transportations, a new laboratory scale experimental setup (total length of 14.85 m and the inner diameter of 15 mm) was constructed. Leakage experiments for pure CO 2 and CO 2 mixtures containing various N 2 concentrations were carried out for different initial phase states (supercritical, liquid and gaseous respectively). The pressure and temperature characteristics and phase transitions of high pressure CO 2 were then studied following pipeline leakage through small diameter nozzles. The results show that a minimum temperature occurs during the leakage process of various initial phase states; while the temperature characteristics of supercritical and gaseous CO 2 leakage were rather different from that of liquid CO 2 leakage. Impacts of impurity (N 2 ), initial inner pressure and nozzle sizes on the leakage behavior were investigated, and two minimum temperature lines, based on N 2 concentrations and initial inner pressures were obtained, respectively. These findings will ascertain that the pipeline is operated above the ductile-brittle transition temperature. © 2019 Institution of Chemical Engineers
DOI
10.1016/j.psep.2019.03.010
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Comments
2019 © This manuscript version is made Available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. This is an Author's Accepted Manuscript of: Gu, S., Li, Y., Teng, L., Wang, C., Hu, Q., Zhang, D., . . . Iglauer, S. (2019). An experimental study on the flow characteristics during the leakage of high pressure CO 2 pipelines. Process Safety and Environmental Protection, 125, 92-101. Available here