The experimental evaluation of an autothermal microchannel reactor for H₂ production from NH₃ decomposition is described. The reactor design incorporates an autothermal approach, with added NH₃ oxidation, for coupled heat supply to the endothermic decomposition reaction. An alternating catalytic plate arrangement is used to accomplish this thermal coupling in a cocurrent flow strategy. Detailed analysis of the transient operating regime associated with reactor start-up and steady-state results is presented. The effects of operating parameters on reactor performance are investigated, specifically, the NH₃ decomposition flow rate, NH₃ oxidation flow rate, and fuel-oxygen equivalence ratio. Overall, the reactor exhibits rapid response time during start-up; within 60 min, H₂ production is approximately 95% of steady-state values. The recommended operating point for steady-state H₂ production corresponds to an NH₃ decomposition flow rate of 6 NL min⁻¹, NH₃ oxidation flow rate of 4 NL min⁻¹, and fuel-oxygen equivalence ratio of 1.4. Under these flows, NH₃ conversion of 99.8% and H₂ equivalent fuel cell power output of 0.71 kW_e is achieved. The reactor shows good heat utilization with a thermal efficiency of 75.9%. An efficient autothermal reactor design is therefore demonstrated, which may be upscaled to a multi-kW H₂ production system for commercial implementation.

描述了自热微通道反应器用于由NH ₃分解产生H ₂的实验评估。反应器设计结合了自热方法，并增加了NH ₃氧化，用于将热量供入吸热分解反应中。交替催化板装置用于在并流策略中完成此热耦合。给出了与反应堆启动和稳态结果相关的瞬态运行方式的详细分析。研究了操作参数对反应器性能的影响，特别是NH ₃分解流量NH ₃氧化流量和燃料-氧气当量比。总的来说，反应堆在启动期间表现出快速的响应时间。在60分钟内，H _2的产生约为稳态值的95％。推荐的工作点稳定状态h ₂生产对应于NH ₃的6 NL分钟分解流速^-1，NH ₃的4 NL分钟氧化流速^-1，和1.4的燃料-氧气当量比。在这些流量下，NH ₃转化率为99.8％，H ₂当量燃料电池的功率输出为0.71 kW _e已完成。该反应堆显示出良好的热利用率，热效率为75.9％。因此，证明了一种有效的自热反应器设计，该设计可以升级到用于商业实施的多千瓦H ₂生产系统。