Helium-3, a potential fusion fuel which is widely deposited in the lunar regolith, may act as a leading role in the future energy supply. Despite abundant investigations of the lunar regolith properties, the research of the transport behavior of helium-3 in porous media is still lacking, which is essential for the prediction of its distribution characteristics. In this work, the storage mechanisms of helium-3 in the lunar regolith are firstly reviewed, and it is found that the primary driving force for the diffusion of helium-3 in porous media arises from its local supersaturation caused by the solar wind flux. After an estimation of the Knudsen number (K_n), it is concluded that Knudsen diffusion is the only transfer regime for the transport of helium-3 in the lunar subsurface because of a rarefaction effect. Moreover, the diffusion coefficient of helium-3 in porous media is predicted and the factors affecting this coefficient are analyzed. Furthermore, a sensitivity analysis is performed due to the uncertainty of the geometric factors of the lunar regolith. Finally, the storage and transport behavior for shale gas and helium-3 are compared, and the prospect for the mining of helium-3 is discussed.

Helium-3 是一种潜在的聚变燃料，广泛沉积在月球风化层中，可能在未来的能源供应中发挥主导作用。尽管对月球风化层性质进行了大量研究，但仍缺乏对氦 3 在多孔介质中的输运行为的研究，这对于预测其分布特征至关重要。在这项工作中，首先回顾了氦 3 在月球风化层中的储存机制，发现氦 3 在多孔介质中扩散的主要驱动力来自于太阳风通量引起的局部过饱和。估计 Knudsen 数 ( K _n)，得出的结论是，由于稀薄效应，克努森扩散是月球地下氦 3 传输的唯一传输方式。此外，预测了氦3在多孔介质中的扩散系数，并分析了影响该系数的因素。此外，由于月球风化层几何因素的不确定性，进行了敏感性分析。最后，对比了页岩气和氦三的储运行为，探讨了三氢的开采前景。