【摘要】 为实现高效低碳制氢，提出一种甲烷与太阳能互补利用的零碳排放制氢系统。该系统将一段式甲烷重整解耦为两段式甲烷重整：部分高温烟气作为反应物引入预重整器，预重整反应热由太阳能提供；重整反应热由驰放气与电解池排放的氧气燃烧提供。剩余烟气预热完待电解的水后直接进行冷凝并分离CO₂。对新系统和参比系统进行能量和平衡分析，结果表明新系统能量和效率提升至42.88%和39.21%，与参比系统相比分别提高了4.77和4.53个百分点。采用图像分析方法揭示系统性能提升的主要原因：对太阳能进行热化学和电化学综合利用，不仅提高了太阳能利用效率，还取消了高能耗CO₂分离装置，效率共提高4.23个百分点；两段式甲烷和烟气重整减少燃烧过程中将高品位甲烷化学能转化为低品位热能，同时也减少了换热过程的损失，效率共提高2.02个百分点。更多还原

【Abstract】 To achieve efficient and low-carbon hydrogen generation, a zero carbon emission hydrogen production system combining methane and solar energy is proposed. The system decouples one-stage methane reforming into two-stage methane reforming: a portion of high-temperature flue gas is introduced into the pre-reforming reactor as reactants, and the reaction heat is provided by solar energy; The reaction heat during the reforming process is providedby combusting purge gas with oxygen from the electrolytic cell. Another part of the flue gas is directly condensed and separated carbon dioxide after preheating the water to be electrolyzed. Energy and exergy balance analyses are conducted on the proposed and reference systems. The results demonstrate that the energy and exergy efficiencies of the proposed system are improved to 42.88% and 39.21%, respectively, by 4.77 and 4.53 percentage points compared to the reference system. Using the exergy utilization diagram(EUD) reveals the main reasons for improved system performance. Comprehensive utilization of solar energy through thermochemistry and electrochemistry. This not only increases the efficiency of solar energy utilization, but also eliminates high-energy consumption carbon dioxide separation devices, resulting in a total increase of 4.23 percentage points in exergy efficiency. The two-stage methane with flue gas reforming process reduces the exergy destruction of highgrade methane chemical energy into low-grade thermal energy during combustion, as well as the heat loss in the heat exchange process, resulting in a total increase of 2.02 percentage points in exergy efficiency.更多还原