项目名称: 多孔钛铝合金担载钯复合膜的制备及膜表面缺陷形成机理研究
项目编号: No.21206065
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 化学工程及工业化学
项目作者: 张栋强
作者单位: 兰州理工大学
项目金额: 24万元
中文摘要: 随着太阳能光伏产业、电子工业、新型石油化工等领域对高纯氢气的需求日益增长,高纯氢气分离技术,尤其是高纯氢气膜分离技术受到广泛关注,显示出诱人的应用前景。为此,本项目提出以多孔钛铝合金担载钯复合膜作为新一代高纯氢气分离膜材料,并对其高温下膜表面缺陷形成机理进行研究。项目拟采用多孔钛铝合金为支撑体制备高性能钯复合膜,运用现代材料表征技术,探知引起金属担载钯膜表面缺陷的主要影响因素,揭示高温下金属担载钯复合膜表面缺陷形成的机理。在此基础上,引入原位氧化法制备金属间扩散阻止膜层,通过调整原位氧化温度、时间以及焙烧制度等条件来调控扩散阻止膜层的厚度、孔径、表面微观结构、亲疏水性能。并对支撑体表面钯膜材料的成核、生长及成膜过程进行多尺度研究,探讨膜层与支撑体之间的界面结合以及膜微结构与分离性能之间的构效关系。项目的实施将为高纯氢气膜分离技术的发展提供理论参考。
中文关键词: 钯复合膜;钛铝合金;表面缺陷;氢气分离;原位氧化
英文摘要: In recent years, the demand for highly pure hydrogen is increasing rapidly due to many fields such as those used in solar photovoltaic system, electronics industry and petrochemical processing. Therefore, high purity hydrogen separation technology, especially for high purity hydrogen separation using membrane technology, attracts widespread attention, showing attractive application prospect. Based on this background, this project propose using palladium composite membranes supported on Ti-Al alloy as a new generation of high-purity hydrogen separation membrane materials, and study the formation mechanism of the membrane surface defects at high temperature. The project intends to adopt porous Ti-Al alloy as a support to prepare high-performance palladium composite membranes. The main reason for causing surface defects of the Pd/Ti-Al alloy composite membrane at high temperatures are investigated using modern materials characterization techniques, and the formation mechanism of surface defects of Pd/Ti-Al alloy composite membrane at high temperature are revealed in this project. In order to prevent intermetallic diffusion between Pd membrane and Ti-Al alloy support, the intermetallic diffusion barrier layer are introduced by in-situ oxidation methods, the effect of the in-situ oxidation temperature, time and sinte
英文关键词: Pd composite membrane;Ti-Al alloy;surface defects;H2 separation;in-situ oxidation