Discussion on 10% as a safe ratio of hydrogen mixing into natural gas grids

doi:10.16085/j.issn.1000-6613.2021-1438

Abstract

Abstract:

Vigorously developing hydrogen energy is an important way to achieve the goal of "carbon peak and carbon neutrality". Mixing hydrogen gas into existing natural gas grids is conducive to the economical, efficient and large-scale transportation and application of hydrogen energy. Appropriate hydrogen mixing ratio is one of the key problems to be solved in hydrogen-mixed natural gas pipeline system. It is said that when the ratio of hydrogen mixing into natural gas is below 10%, it can be transported directly through the natural gas grids without verification. However, this view is untenable at present. The reasons were expounded in this paper from three aspects: adaptability of pipe network system to hydrogen mixing, discussion on hydrogen mixing ratio of demonstration project, and standard specification. Pipeline transportation technology of hydrogen-mixed natural gas was in its initial stage and its safety guarantee still faced many challenges. Any conclusion needed to be demonstrated and verified repeatedly in order to steadily promote the development of hydrogen energy.

Key words: hydrogen energy, hydrogen-mixed natural gas, hydrogen safety, pipeline transportation, hydrogen mixing ratio

摘要：

大力发展氢能是实现“碳达峰、碳中和”目标的重要途径之一。将氢气掺入现有天然气管网利于实现氢能经济高效、大规模输送与应用。安全掺氢比是掺氢天然气管输系统有待解决的关键问题之一。有观点提出当掺氢天然气中的掺氢比在10%以下时，可无需加以验证地直接通过天然气管网输送。本文提出从目前来看，该观点不成立。文章从管网系统掺氢适应性、示范项目掺氢比探讨和标准规范3个方面阐述了个中缘由。文中指出，掺氢天然气管输技术正处于起步阶段，其安全保障还面临诸多挑战，任何结论都需要经过反复论证和验证，以稳步推动氢能产业发展。

关键词: 氢能, 掺氢天然气, 氢安全, 管道输送, 掺氢比

CLC Number:

TE832

CHEN Weifeng, SHANG Juan, XING Baihui, WEI Haotian, GU Chaohua, HUA Zhengli. Discussion on 10% as a safe ratio of hydrogen mixing into natural gas grids[J]. Chemical Industry and Engineering Progress, 2022, 41(3): 1487-1493.

陈伟锋, 尚娟, 邢百汇, 魏皓天, 顾超华, 花争立. 关于天然气管网安全掺氢比10%的商榷[J]. 化工进展, 2022, 41(3): 1487-1493.

Figures/Tables 4

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