Lee, Yu-PingYu-PingLeeChang, Che-WeiChe-WeiChangLin, Yu-ChuYu-ChuLinLuo, Chen-SyunChen-SyunLuoWu, Shan-LuoShan-LuoWuOu, Min-NanMin-NanOuHSIU-PO KUOLee, Chau-HwangChau-HwangLeeLiao, James C.James C.LiaoChen, Yue-GauYue-GauChenChen, Yang-YuanYang-YuanChen2025-12-042025-12-042025-11-2803603199https://www.scopus.com/record/display.uri?eid=2-s2.0-105020848436&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/734309Hydrogen is critical for reducing CO2 emissions from gas-fired power plants in the pursuit of net-zero by 2050. This study investigates the performance of two pilot-scale moving bed methane pyrolysis reactors (4-inch and 6-inch diameters) using carbon-based catalysts. The reactors operated for over 500 h, including several 24-h continuous runs, across a temperature range of 1000–1080 °C and varying methane feed rates. Methane conversion ranged from 20 % to 37 % under different operating conditions. The 4-inch reactor achieved optimal performance at 80 NLPM and furnace temperatures of 1080–1080-1060 °C, with an energy consumption of 11.0 kWh/kg_H2. The 6-inch reactor demonstrated improved efficiency, reaching 9.7 kWh/kg_H2 at 70 NLPM under the same temperature profile. Overall, the results confirm that methane pyrolysis is an energy-efficient hydrogen production method, offering a net energy gain approximately 4.1 times greater than the input. This makes it a promising option for low-carbon, hydrogen-natural gas co-firing in power generation.falseEnergy consumptionMethane pyrolysisMoving bedPilot-scalejournal article10.1016/j.ijhydene.2025.1524082-s2.0-105020848436