Development of advanced particulate filters for automotive applications

开发用于汽车应用的先进颗粒过滤器

• 批准号: 493797-2016
• 负责人: Hayes, Robert
• 金额: $ 10.85万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=653267
• 关键词: Development; advanced; particulate; filters; automotive

A combination of legislations is driving the need for improved fuel economy and reduced emissions. These require the use of new fuels and engine technologies that may increase, for example, particulate emissions. At the same time, tough new laws governing particulates are also being introduced, owing to concern over their health implications. In this research we will study the development of improved catalytic after-treatment systems that can be applied to diesel, gasoline and natural gas engines used in the transportation sector. The primary aspect of the emission system to be studied is the particulate filter, both with and without the combined functionality for the selective catalytic reduction (SCR) of NOX compounds. One significant new engine technology is gasoline direct injection (GDI), where the fuel is injected into the cylinder rather than the intake port, in a manner similar to diesel engines. Although this improves fuel economy, it also results in particulate matter in the emissions. These particles are different in several ways to the particulates emitted from diesel engines. Using a combination of experimental and sophisticated modelling techniques, we will study particle generation and capture in commercial filter material. These results will help us to understand the efficiencies of existing structures and their effect of the flow distribution at the microscopic level. The results will allow for better materials design of the filter. Another significant investigation is the effect of adding the NO reduction functionality directly into the filter by applying a catalytic washcoat to the filter substrate. There are a number of issues to be resolved relating to the overall structure and optimal washcoat distribution, which will lead ideally to the elimination of the separate deNOX reaction that is currently used.****

多项立法正在推动提高燃油经济性和减少排放的需求。这些需要使用新的燃料和发动机技术，这可能会增加颗粒物排放等。与此同时，出于对颗粒物健康影响的担忧，还出台了管理颗粒物的严格新法律。在这项研究中，我们将研究改进的催化后处理系统的开发，该系统可应用于交通运输领域使用的柴油、汽油和天然气发动机。要研究的排放系统的主要方面是颗粒过滤器，无论是否具有氮氧化物选择性催化还原 (SCR) 的组合功能。一项重要的新型发动机技术是汽油直喷 (GDI)，其中燃料以类似于柴油发动机的方式喷射到气缸而不是进气口。虽然这提高了燃油经济性，但也会导致排放物中出现颗粒物。这些颗粒在几个方面与柴油发动机排放的颗粒不同。我们将结合实验和复杂的建模技术，研究商用过滤材料中的颗粒生成和捕获。这些结果将帮助我们了解现有结构的效率及其在微观层面上对流量分布的影响。研究结果将有助于更好地设计过滤器的材料。另一项重要的研究是通过在过滤器基材上涂覆催化涂层，将 NO 还原功能直接添加到过滤器中的效果。有许多与整体结构和最佳涂层分布相关的问题需要解决，这将理想地消除目前使用的单独脱硝反应。****