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开发低温高效同时去除碳烟颗粒(PM)和氮氧化物(NOx)的催化剂已成为研究热点。以三维有序大孔(3DOM) Ti0.7Si0.3O2为载体,采用等体积浸渍法制备不同Ce/Mn摩尔比的Ce_xMn10-xO_δ~/3DOM Ti0.7Si0.3O2催化剂,系统研究其结构性质、氧化还原性能及对PM和NOx的催化去除性能的影响。结果表明,催化剂均保持了完整的三维有序大孔结构,其中Ce_1Mn_9O_δ/3DOM Ti0.7Si0.3O2催化剂表现出最优的综合性能,碳烟燃烧峰值温度降至443℃,NO最高转化率达93%,并在223～339℃内维持80%以上的脱硝率。多种表征结果证明,Ce与Mn间的协同作用显著增强了催化剂的低温氧化还原能力与NO氧化活性,显示出良好的尾气净化应用潜力。
Abstract：The development of catalysts capable of simultaneously removing soot particles(PM) and nitrogen oxides(NOx) at low temperatures with high efficiency has become a research hotspot. In this paper, CexMn10-xO_δ/3 DOM Ti0.7Si0.3O2 catalysts with different Ce/Mn molar ratios were prepared by the equal volume impregnation method using three-dimensional ordered macroporous(3 DOM) Ti0.7Si0.3O2 as the carrier. The structural properties, redox performance, and catalytic removal performance for PM and NOx of the catalysts were systematically studied. The results show that all the catalysts maintain a complete three-dimensional ordered macroporous structure. Among them, the Ce1 Mn9 O_δ/3 DOM Ti0.7Si0.3O2 catalyst exhibits the best comprehensive performance: the peak temperature of soot combustion is reduced to443 ℃, the maximum NO conversion rate reaches93%, and it maintains a denitration efficiency of over80% within the range of 223～339 ℃. Various characterization proves that the synergistic effect between Ce and Mn significantly enhances the low-temperature redox ability and NO oxidation activity of the catalyst, demonstrating good potential for application in exhaust gas purification.
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基本信息:
DOI：10.13358/j.issn.2096-9309.2025.1120.03
中图分类号:TQ426;X701
引用信息:
[1]程颖,陈新宇,杨伊文,等.铈基复合催化剂同时消除碳烟和氮氧化物性能的研究[J].河北环境工程学院学报,2026,36(01):73-81.DOI:10.13358/j.issn.2096-9309.2025.1120.03.
基金信息:
国家自然科学基金青年科学基金项目(22202058); 河北省自然科学基金面上项目(E2023415005)
2026-01-27
2026-01-27
2026-01-27