耐硫性PdxSy/SiO2甲烷低温氧化催化剂的研究

项目名称： 耐硫性PdxSy/SiO2甲烷低温氧化催化剂的研究

项目编号： No.21473159

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 马磊

作者单位： 浙江工业大学

项目金额： 80万元

中文摘要： 国内外对于如何提高甲烷低温氧化反应钯催化剂的耐硫性一直没有很好的对策，本项目摒弃了增强载体吸附硫物种的能力或构建Pd-M多组分体系以保护PdO活性相的常规研究思路，提出设计新的钯活性组分并选择不与硫物种相互作用的载体构建催化剂，从根本上阻断催化剂各组成部分与硫物种的相互作用。本项目提出以PdxSy取代PdO构建耐硫性PdxSy/SiO2甲烷低温氧化催化剂，PdxSy晶格中的硫原子可以保护周围多个钯原子不受反应气氛中硫物种的影响，硫元素与氧元素位于元素周期表同一主族相邻位置的特点使PdxSy与PdO性质相近。研究结果已初步验证这一构想，PdxSy/SiO2催化剂在甲烷低温氧化反应中表现出真正的耐硫性和较高的催化活性。本项目将围绕PdxSy/SiO2催化剂性质与性能内在联系、PdxSy/SiO2催化剂的可控制备、PdxSy/SiO2催化剂甲烷低温氧化反应机理等重要基础科学问题开展研究。

中文关键词： 耐硫性；PdxSy/SiO2；催化剂；甲烷；氧化

英文摘要： How to improve the sulfur tolerance of palladium catalyst for the oxidation of methane at low temperatures has not been solved well. This project has changed the traditional research ideas, such as enhancing the support adsorption for sulfur species or constructing the Pd-M system so as to protect the PdO active phase. The project plans to replace PdO with PdxSy to realize the purpose of blocking the sulfur species fundamentally. The sulfur atom in the PdxSy lattice can protect the surrounding palladium atoms not affected by the sulfur species. At the same time, the sulfur element and oxygen element are located at the adjacent position of the same main group in the periodic table, which makes the PdxSy and PdO have similar properties. The research results has demonstrated this idea. The PdxSy/SiO2 catalysts have exhibited the real sulfur tolerance and high catalytic activity in the oxidation of methane reaction at low temperatures. This project will focus on the relations between properties and performance, controllable preparation of PdxSy/SiO2 catalysts, reaction mechanism, and other basic scientific problems.

英文关键词： Sulfur resistant;PdxSy/SiO2;Catalyst;Methane;Oxidation