【摘要】 天然气掺氢是降低城镇终端燃具碳排放的有效途径之一，对于实现“双碳”目标具有重要意义。掺氢天然气在民用燃具领域具有巨大应用潜力，为加快城镇终端掺氢天然气利用的进程，分别从燃气互换性理论、应用实验及数值模拟等方面开展研究，阐述了天然气掺氢燃烧的可行性，探讨了掺氢对燃气灶及热水器燃烧性能、热效率以及污染物排放的影响，对比了天然气燃烧反应机理的特点和适用范围。最后结合我国城镇天然气的相关标准、掺氢安全性及经济性等方面，指出了限制城镇终端天然气掺氢燃烧技术应用的主要因素以及未来发展趋势。研究结果表明：(1)天然气与氢气互换性主要受燃气组分和互换性指标的影响，天然气适宜的掺氢范围为0～20%；(2)掺氢能够显著降低天然气的碳排放，但燃具的热效率、氮氧化物排放以及适应性仍需进一步深入研究；(3)需要进一步采用量子化学、机器学习等先进手段探究天然气掺氢数值模拟的燃烧反应机理。结论认为，随着天然气掺氢管道的建设和发展，掺氢天然气在终端利用领域将展现出巨大潜力，与此同时掺氢天然气在终端实际应用中仍面临着诸多限制和技术挑战，天然气掺氢燃烧技术研究现状的系统梳理对推动氢能的安全高效应用具有重要现实意义，同时也为天然气掺氢燃烧技术的发展提供了研究思路和攻关方向。更多还原

【Abstract】 Blending hydrogen into natural gas is an effective approach to reduce carbon emissions from urban gas appliances and is of great significance for the achievement of "dual carbon" goal. Hydrogen-blended natural gas has huge application potential in the field of civilian gas appliances. To accelerate the utilization process of hydrogen-blended natural gas at urban terminals, this paper conducts research from the aspects of gas interchangeability theory, application experiment and numerical simulation. Then the feasibility of hydrogen-blended natural gas combustion is elaborated, and the impact of hydrogen blending on the combustion performance, thermal efficiency and pollutant emission of gas stoves and water heaters is discussed. Moreover, the characteristics and application scopes of the combustion reaction mechanism of natural gas are compared. Finally, the main factors restricting the application of hydrogenblended natural gas combustion technology at urban terminals and the future development trends are pointed out from the aspects of relevant standard and hydrogen blending safety and economy of urban natural gas in China. The following results are obtained. First, the interchangeability between natural gas and hydrogen is primarily influenced by the gas composition and interchangeability index, and the suitable hydrogen blending range of natural gas is 0–20%. Second, hydrogen blending can significantly reduce the carbon emission of natural gas, but further research is required to fully understand the effects on the thermal efficiency, nitrogen oxide emission and adaptability of combustion appliance. Third, furthermore, advanced techniques such as quantum chemistry and machine learning are adopted to understand the mechanism of combustion reaction in numerical simulation of natural gas hydrogen blending. In conclusion,with the construction and development of hydrogen-blended natural gas pipeline, the hydrogen-blended natural gas will exhibit huge potential in the field of end utilization, but meanwhile face many limitations and technical challenges. What’s more, a systematic review of the research status of hydrogen-blended natural gas combustion technology is of important and practical significance in promoting the safe and efficient application of hydrogen energy, and provides research ideas and directions for the development of hydrogen-blended natural gas combustion technology.更多还原