Reaction kinetics for automotive exhaust gas catalysts with reversible noble metal oxidation

可逆贵金属氧化的汽车尾气催化剂的反应动力学

• 批准号: 350398919
• 负责人: Professor Dr. Guido Schmitz
• 金额: --
• 依托单位: Institut für Chemische Verfahrenstechnik (ICVT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/350398919?language=en
• 关键词: Reaction; kinetics; automotive; exhaust; gas

This interdisciplinary joint project will combine engineering methods with material science methods to describe the conversion behaviour of automotive exhaust gas catalysts with respect to the reversible noble metal oxidation. Material science methods allow to determine the state of the solid phase with molecular resolution. The characterization of the solid phase (in this case the catalyst) is carried out by atom probe tomography (APT). Therefore a sample of the catalyst is prepared to a needlepoint of 10-50nm radius, treated under selected conditions and analysed via APT. The goal of the project is to develop a methodology for the processing of kinetic models for catalysts that change with reaction conditions. Therefore we combine transient conversion measurements with measurements of the atomic composition to gain physically sound descriptions of the transformations and reactions. The approach will be tested for diesel exhaust gas catalysts with platinum, palladium and Pt7Pd-alloys. The institute for chemical process engineering (ICVT) will provide transient measurements of the reaction conversions to determine amongst other things the reaction conditions for relevant changes in the catalyst behaviour. The institute for material science (IMW) will provide the high resolution characterization of the active material. Modelling and simulation will be conducted by ICVT.

这个跨学科的联合项目将联合收割机工程方法与材料科学方法相结合，以描述汽车尾气催化剂在可逆贵金属氧化方面的转化行为。材料科学方法允许以分子分辨率确定固相的状态。通过原子探针层析成像（APT）进行固相（在这种情况下为催化剂）的表征。因此，将催化剂样品制备成10- 50 nm半径的针尖，在选定条件下处理并通过APT分析。该项目的目标是开发一种方法，用于处理随反应条件变化的催化剂的动力学模型。因此，我们结合联合收割机瞬态转换测量的原子组成的测量，以获得物理上健全的描述的转变和反应。该方法将被测试的柴油机尾气催化剂与铂，钯和Pt 7 Pd合金。化学过程工程研究所（ICVT）将提供反应转化率的瞬态测量，以确定催化剂行为相关变化的反应条件等。材料科学研究所（IMW）将提供活性材料的高分辨率表征。建模和模拟将由国际酷刑受害者中心进行。