Hierarchically porous structures are a new type of biomimetic structures that have important applications in several fields. In this study, we aimed to put forward and introduce a new type ordered hierarchical porous structure in the design of solar thermal chemical reaction chambers to utilize CH₄ and CO₂. The model of the chambers was established based on the hierarchically porous structure. The effect of hierarchically porous structures on the methane reforming performance of a solar thermal chemical reaction chamber was studied. Based on the finite volume method, FLUENT software was combined with user-defined functions to calculate the effect of different pore size combinations and distributions on the methane conversion. The hierarchically porous structure was found to increase the methane conversion because of the excellent flow characteristics and radiation properties of the structure. The different pore size combinations of the hierarchically porous structure were analyzed, and the optimal pore size combination that results in the maximum methane conversion was obtained. Similarly, the different pore size distributions of the hierarchically porous structure were analyzed, and the optimal pore size distribution was obtained. The conversion of methane is the highest when the length of the small hole section is 0.02 m. This study can provide a new process and reference for the utilization of CH₄ and CO₂ and design of solar high-temperature thermochemical reaction chambers, based on the hierarchically porous structure. The maximum methane conversion of approximately 85% was found at d₁ = 1.0 mm, d₂ = 2.5 mm, and L₁ = 0.02 m.

分层多孔结构是一种新型的仿生结构，在多个领域都有重要的应用。在这项研究中，我们旨在提出和介绍一种新型的有序分层多孔结构，用于利用CH ₄和CO ₂的太阳热化学反应室的设计中。。基于分层的多孔结构建立了室的模型。研究了分层多孔结构对太阳热化学反应室甲烷重整性能的影响。基于有限体积方法，FLUENT软件与用户定义的函数结合在一起，可以计算出不同孔径组合和分布对甲烷转化率的影响。发现分层多孔结构由于其优异的流动特性和辐射性能而提高了甲烷的转化率。分析了分层多孔结构的不同孔径组合，并获得了导致最大甲烷转化率的最佳孔径组合。相似地，分析了分层多孔结构的不同孔径分布，得到了最佳的孔径分布。当小孔段的长度为0.02 m时，甲烷的转化率最高。该研究可以为CH的利用提供新的过程和参考。₄和CO ₂以及基于分层多孔结构的太阳能高温热化学反应室的设计。发现在d ₁ = 1.0 mm，d ₂ = 2.5 mm和L ₁ = 0.02 m时，最大甲烷转化率约为85％。