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

拟建项目的主题是在贫燃废气中利用Pt和Pd催化剂催化H2低温还原NOx。与现有的脱氮技术相比，H2-deNOx转化具有即使在200℃以下也具有高转化率的优势。拟进行的研究包括：-使用Pt和Pd催化剂与酸性载体CeO2， TiO2， ZrO2和Al2O3-SiO2以及促进剂WOx， SOx和POx结合，对H2-deNOx反应进行详细的分子理解，以控制H2-deNOx活性和N2选择性。-了解促进剂和支撑剂对活性组分结构和电子性能的影响。-了解分子反应机理，特别是支持剂和促进剂的机理作用，特别是通过使用x射线吸收和发射光谱的原位分析技术。-基于对反应机理及促进剂和载体作用的理解，对Pt和Pd催化剂进行合理改进。-对固定式和移动式稀燃发动机（CH4， H2和柴油发动机）最有前途的催化剂进行技术评估。

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).