核-壳结构纳米复合材料在脱硝中的应用

核-壳结构纳米复合材料基于壳对核的有效保护和核壳之间的相互作用而表现出优异的脱硝活性和抗毒性。从核-壳催化剂的制备方法及核壳组成对脱硝活性的影响进行了总结和讨论。采用化学沉积法、自组装法和水热法等制备方法,以TiO2、CeO2和Fe-ZSM-5分子筛等为壳结构时,能有效阻止SO2对活性中心原子的毒化作用,从而提高脱硝催化剂的抗硫性。通过优化成核的活性组分和成壳的物质,有望制备出具有高活性和高稳定性的核-壳脱硝催化剂。

Application of core-shell nanocomposites in NO_x removal

The core-shell structure nanocomposites exhibit excellent denitrification activity and toxicity resistance based on the effective protection of the shell on the core and the interaction between the core and the shell.In this paper,influence ofthe preparation method andthecore and shell composition on the denitrification activity were summarized and discussed.When TiO2,CeO2 and Fe-ZSM-5 zeolites were used as the shell structure,the preparation methods such as chemical deposition method,self-assembly method and hydrothermal method could effectively prevent the poisoning of SO2 on the active central atom,thereby improving the SO2 resistance of the catalyst.It was expected to obtain a core-shell denitration catalyst with high activity and high stability by optimizing the nucleating active component and the shell-forming material.