Study of the effect of nickel foam synergistic CO₂ on low hydrogen ratio methane explosion

ABSTRACT

To improve the explosion suppression efficiency of porous media in natural gas hydrogen-doped pipelines, this paper designs and builds an experimental platform with dimensions of 10 cm × 10 cm × 100 cm organ transparent glass explosion pipeline and researches the synergistic effect of the use of nickel foam and $\mathit{C}{O}_2$ to inhibit the explosion of hydrogen-doped methane with a hydrogen doping ratio of $\mathit{\phi }=10\mathrm{\%}$. Studies have shown that using a dual explosion suppression mechanism, the synergistic effect of nickel foam and $\mathit{C}{O}_2$ acting at different jet positions has a significant inhibitory effect on the flame and overpressure of low-hydrogen-ratio methane explosions. The synergistic $\mathit{C}{O}_2$ in porous media has a more potent inhibitory effect on the right-side wall jet than on the left-side and left-side jet. When the synergistic impact of nickel foam and $\mathit{C}{O}_2$ acts on the right-side wall jet, the flame is quenched, substantially attenuating the overpressure peak. When the nickel foam synergistic $\mathit{C}{O}_2$ acts on the right-side wall jet, the optimal effect is achieved when the $\mathit{C}{O}_2$ jet pressure is set at 0.3 MPa, which successfully quenches the flame and significantly reduces the overpressure peak. However, the dual explosion suppression mechanism fails when the $\mathit{C}{O}_2$ jet pressure is 0.2 MPa.

KEYWORDS:

• Inert gas
• cooperative explosion suppression
• foamed nickel
• hydrogenated methane
• fire and explosion proof

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the Science and Technology Research Program of Chongqing Municipal Education Commission [KJQN202101503]; The Science and Technology Innovation Project for Graduate Students of Chongqing Institute of Science and Technology [YKJCX2220704]; Open Foundation of the Chongqing Key Laboratory for Oil and Gas Production Safety and Risk Control [cqsrc202111].

Notes on contributors

Xianqi Duan

Xianqi Duan Investigation, Methodology, Data curation, Writing - original draft.

Yulong Duan

Yulong Duan Conceptualization, Resources, Funding acquisition, Supervision, Writing - review & editing.

Lulu Zheng

Lulu Zheng: Carried out experiments, Investigation, Data curation, Softwar, Methodology.

Guoqin He

Guoqin He Investigation, Writing - review & editing.

Shilin Lei

Shilin Lei Investigation, Writing - review & editing