超声改性赤泥基催化剂的组成与结构调控及其氨分解制氢性能研究

氧化铝生产过程中产生的赤泥大量堆存，不仅污染环境、存在溃坝隐患，还造成了资源的严重浪费。.氢气是最清洁的能源之一，氨分解制氢技术具有产物氢气中不含COx、原料液氨易于运输、氨的储氢容量和能量密度高于甲醇等其它燃料等优点，而受到科研工作者的广泛关注。然而，高性能氨分解催化剂的制备是氨分解制氢工艺需要解决的主要问题之一。.本项目从氧化铝赤泥的高附加值资源化利用角度出发，对赤泥进行超声改性、组成和结构调控，制备具有特定孔结构和高比表面积的改性赤泥；设计制备改性赤泥负载镍和钌的纳米催化剂，并开展改性赤泥基催化剂氨分解制氢性能和机理研究。系统考察超声辅助改性条件和成孔剂对赤泥微观结构的影响规律，深入研究改性赤泥组成、赤泥各组分的相互作用、赤泥与活性组分的协同作用、改性处理获得的微观结构等对其催化性能的影响规律及催化作用机制等基础问题，以期实现赤泥作为氨分解制氢催化剂的资源化循环利用。

Red mud is a major waste residue of bauxite processing for alumina production using different methods. Its disposal remains an issue of great importance with significant environmental concerns. In the past decades, a lot of research has been done to utilize red mud for environmental-benign applications such as a building material additive, wastewater treatment agent, soil conditioner and for metal recovery.. The on-site generation of hydrogen for fuel cells is of great important for environmental protection consideration. The direct generation of clean and cheap hydrogen motivates the investigation on catalytic ammonia decomposition because ammonia has a high hydrogen storage density, low price, COx-free, complete production technology and transportation technology and other advantages. However, the main issue for the technology of hydrogen production from decomposition of ammonia is the design and synthesis of high activity catalysts.. In view of the above analysis, this project starting from the angel of resource utilization of red mud. Carry out the investigation of ultrasonic modification of red mud, regulate the component and microstructure, and obtaining the modified red mud with specific porous structure and high surface area. Design and preparation the modified red mud supported ruthenium and nickle nanocatalysts. Study on the catalytic performance and catalytic mechanism of the as-prepared nanocatalysts for ammonia decomposition to hydrogen. Systematic investigate the effect of ultrasonic modification condition and the addition of the pore forming agent on the microstructure of red mud. Intensively study the interaction of red mud’s components, the synergistic reaction of red mud and active component, the components and microstructure of modified red mud on their catalytic properties and catalytic mechanism. The ultimate aim is realize the efficient recycling utilization of red mud for ammonia decomposition to hydrogen.