焦炉煤气是炼焦过程的副产物，其直接燃烧或排放造成了极大能量浪费和环境危害。项目针对目前焦炉煤气清洁利用效率低下的问题，拟提出一种结合二氧化碳原位捕获与氢气在线膜分离的焦炉煤气直接重整制氢方法，并围绕流态化重整系统中的钯合金膜稳定性展开研究。结合晶体结构分析，界面物理化学与多相流测试、多相传热传质理论，从微观尺度深入研究膜层内部针孔演变规律、添加元素对钯晶相结构的改变、陶瓷涂层与添加元素的相互扩散效应，探索高温下协同改进钯合金膜稳定性、透氢性的方法与机理；从颗粒-膜层尺度，考察颗粒特性、行为与膜层表观特征、化学成分、微观结构变化的关联，揭示流态化颗粒在重整气氛下对透氢膜的物理磨损、化学作用机制；从反应系统尺度，阐明流态化焦炉煤气重整制氢协同捕碳中各子过程的耦合规律及其对重整稳定性的影响，以期为实现利用焦炉煤气直接制氢提供理论和实践基础。

Coke oven gas is a byproduct of coke-making process, and its direct combustion or discharge leads to considerable energy waste and serious environmental consequences. This program proposes a way to derive hydrogen from coke oven gas by integrating carbon dioxide in-situ capture and hydrogen-membrane separation simultaneously with one-step steam reforming，and focus on the stability of Pd alloy membrane applied in fluidize bed reformer. By combing crystalline structure analysis, surface physical chemistry analysis, multiphase flow measurements and multiphase transport theory, the evolution of pinhole in membrane layer, change of Pd crystalline structure as third metal being introduced, and inter-diffusion between ceramic coating and membrane layer would be thoroughly studied, to explore methodologies improving stability and hydrogen permeability of Pd alloy membrane coordinately at high temperature. Effects of particles properties, gas-particle behaviors on surface morphology, chemical contents and grain structures of membrane layer are to be investigated, so the abrasion and erosion exerting to membrane layer by fluidizing particles under reforming atmosphere in multi-phase reacting system will be clarified. The coupling mechanism of catalysis reactions, carbon dioxide sorption, H2 permeation and species transport in a fluidized membrane reformer will be revealed， and its effects on reforming stability will also be investigated. Findings of this program will provide theoretical and practical supports for directly deriving hydrogen from coke oven gas.