Improved catalytic converters for selective catalytic reduction

改进的催化转化器用于选择性催化还原

• 批准号: 488360-2015
• 负责人: Hayes, Robert
• 金额: $ 6.99万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=600711
• 关键词: Improved; catalytic; converters; selective; reduction

To meet strict government mandated automotive emission targets and improved fuel economy, there is great interest in the use of lean burn engines, either Diesel, gasoline or natural gas. Control of emissions, especially oxides of nitrogen, is challenging in this environment, and is usually achieved using selective catalytic reduction (SCR). In this reaction, ammonia is injected into the exhaust, which then catalytically reacts with NOX to produce nitrogen. Several catalysts have been used, but they suffer from excessive deactivation in the presence of water. The newest catalyst being exploited is based on copper chabazite. Because of their relative newness, there is not much information available that allows for the computer modelling of the reactor, which is an increasingly important tool used in the development of new converters.

为了满足政府严格规定的汽车排放目标并提高燃油经济性，人们对使用稀薄燃烧发动机（柴油、汽油或天然气）非常感兴趣。在这种环境下，控制排放（尤其是氮氧化物）具有挑战性，通常通过选择性催化还原 (SCR) 来实现。在此反应中，氨被注入废气中，然后与氮氧化物发生催化反应，产生氮气。已经使用了几种催化剂，但它们在水存在下会过度失活。正在开发的最新催化剂基于铜菱沸石。由于其相对较新，没有太多信息可用于对反应堆进行计算机建模，而反应堆是开发新型转换器中越来越重要的工具。