NOx reduction by H2 on Pt and Pd catalysts in O2-rich exhaust gases

通过 Pt 和 Pd 催化剂上的 H2 还原富 O2 废气中的 NOx

• 批准号: 491834613
• 负责人: Professor Dr. Matthias Bauer
• 金额: --
• 依托单位: Institut für Energieverfahrenstechnik und Chemieingenieurwesen (IEC)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/491834613?language=en
• 关键词: NOx; reduction; H2; Pt; Pd

The theme of the planned project lies in the catalytic low-temperature NOx reduction by H2 on Pt and Pd catalysts in lean combustion exhaust gases. Compared to the established denitrification techniques, the H2-deNOx conversion has the advantage of high conversion rates even below 200 ° C. The intended research addresses the following points:- Detailed molecular understanding of the H2-deNOx reaction to control H2-deNOx activity and N2 selectivity using Pt and Pd catalysts combined with the acidic supports CeO2, TiO2, ZrO2 and Al2O3-SiO2 as well as the promoters WOx, SOx and POx.- Understanding the influence of promoters and supports on the structural and electronic properties of the active component .- Knowledge of the molecular reaction mechanism, in particular clarification of the mechanistic role of support and promoter, especially by using in situ analysis techniques with focus on X-ray absorption and emission spectroscopy.- Rational improvement of the Pt and Pd catalysts based on the developed understanding of the reaction mechanism and the effects of promoter and support.- Technical evaluation of the most promising catalysts for stationary and mobile lean-burn engines (CH4, H2 and diesel engines).

计划项目的主题是在贫燃废气中通过Pt和Pd催化剂上的H2催化低温还原NOx。与已建立的脱氮技术相比，H2-deNOx转化具有即使在200 ° C以下也具有高转化率的优点。- 使用Pt和Pd催化剂与酸性载体CeO 2、TiO 2、ZrO 2和Al 2 O3-SiO2以及促进剂WOx、SOx和POx组合来控制H2-deNOx活性和N2选择性的H2-deNOx反应的详细分子理解。了解助催化剂和载体对活性组分的结构和电子性质的影响。分子反应机理的知识，特别是支持和促进剂的机械作用的澄清，特别是通过使用现场分析技术，重点是X射线吸收和发射光谱。基于对反应机理以及助催化剂和载体作用的深入理解，对Pt和Pd催化剂进行合理改进。对固定式和移动的贫燃发动机（甲烷、氢气和柴油发动机）最有前途的催化剂进行技术评估。