Advancements in microreactor technology for hydrogen production via steam reforming: A comprehensive review of numerical studies

Advancements in microreactor technology emerge as a promising solution for low-cost hydrogen (H2) production, and there is significant progress being made towards developing microreactor technology for onboard H2 production. It is possible that fully matured microreactor technology for onboard H2 production will become available in the next decade. This review summarizes the key numerical findings in the advancements of research on H2 production by steam reforming in microreactors. Although numerous studies are being conducted on microreactors for different fuels, flow altering structures, and reaction parameters for steam reforming, they still lag in considering all parameters. This study aims to comprehend all performance influencing parameters, both structural and reaction, to better understand the selection of a microreactor. Based on the findings of this study, it is recommended to use methanol as the fuel and an optimal design that is easy to fabricate while also offering high performance. Since performance is influenced by numerous parameters, identifying the best conditions for the reaction and optimal structure can be achieved through the use of artificial intelligence (AI) techniques. [Display omitted] •Microreactor coupled to fuel cells for onboard applications.•Comprehensive review of studies on hydrogen production in microreactors.•CO free hydrogen can be produced from methanol steam reforming in microreactor.•Structural parameters have the most influence on microreactor performance.•AI can enhance microreactor performance by optimizing various parameters.