Numerical simulation study on shock wave induced spontaneous combustion of high pressure hydrogen-doped natural gas leakage

DOI

10.2991/978-94-6463-415-0_29How to use a DOI?

Keywords

High pressure hydrogen-doped natural gas; leakage; shock wave propagation; spontaneous combustion characteristics; hydrogen blending ratio; relief pressure

Abstract

Incorporating a specific percentage of hydrogen to natural gas and utilizing current natural gas pipelines to transport hydrogen-natural gas mixtures can achieve an effective way of transporting hydrogen on a large scale, long distances, and with high efficiency, which is one of the most significant ways to promote the efficiency of hydrogen energy utilization. However, high-pressure storage and transportation and suitable hydrogen doping ratios have become one of the safety issues that threaten the stable implementation of this technological option. Therefore, based on numerical simulation, the spontaneous combustion of high-pressure hydrogen-doped natural gas was investigated at different hydrogen doping ratios and discharge pressures. The effects indicate that the higher the hydrogen doping ratio and the higher the discharge pressure, the greater the shock wave pressure and the greater the average propagation velocity of the shock wave. The higher the hydrogen blending ratio and the higher the discharge pressure, the more conducive to the occurrence of spontaneous combustion, and the initial spontaneous combustion ignition is more likely to occur near the position of the bursting disc. When the discharge pressure is 25 MPa, the pure methane gas with a hydrogen blending ratio of 0% does not undergo spontaneous combustion in the tube. When the hydrogen blending ratio is from 5% to 30%, the temperature of spontaneous combustion is reduced from 1130 K to 1087 K, the time of spontaneous combustion is shortened from 157 μs to 110 μs, and the distance of spontaneous combustion is reduced from 134 mm to 100 mm (from the bursting disc). When the discharge pressure is 13 MPa, the hydrogen-doped natural gas with a hydrogen blending ratio of 20% does not spontaneous combustion in the tube. When the discharge pressure is from 19 MPa to 40 MPa, the time of spontaneous combustion is shortened from 194 μs to 61 μs, and the distance of spontaneous combustion is reduced from 166 mm to 60 mm (from the burst disc).

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Zhenmin Luo
AU  - Chunyan Zhang
PY  - 2024
DA  - 2024/05/14
TI  - Numerical simulation study on shock wave induced spontaneous combustion of high pressure hydrogen-doped natural gas leakage
BT  - Proceedings of the 2023 9th International Conference on Advances in Energy Resources and Environment Engineering (ICAESEE 2023)
PB  - Atlantis Press
SP  - 279
EP  - 291
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-415-0_29
DO  - 10.2991/978-94-6463-415-0_29
ID  - Luo2024
ER  -