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首页> 外文期刊>SAE International Journal of Fuels and Lubricants >Cold Start Concept (CSC): A Novel Catalyst for Cold Start Emission Control
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Cold Start Concept (CSC): A Novel Catalyst for Cold Start Emission Control

机译：冷启动概念（CSC）：一种用于冷启动排放控制的新型催化剂

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摘要

Catalytic emission control systems are installed on nearly all automobiles and heavy duty trucks produced today to reduce exhaust emissions for the vehicles to meet government regulations. Current systems can achieve very high efficiencies in reducing tailpipe emissions once the catalytic components reach their operating temperatures. They are, however, relatively ineffective at temperatures below their operating temperature windows, especially during the cold start period of the vehicles. With the increasingly stringent government regulations, reducing the emissions during the cold start period before the catalytic components reach their operating temperatures is becoming a major challenge. For cold start HC control, HC traps based on zeolites have been investigated and commercialized for certain applications. For cold start NOx control, especially in lean burn engine exhaust, NOx storage and release catalysts have been evaluated. In this paper we will introduce a novel catalyst which we refer to as Cold Start Concept (CSC) catalyst technology. This cold start catalyst not only stores HC and NOx at low temperatures with very high storage efficiencies, but also converts a significant portion of the stored HC/NOx during the warm-up period before the rest of the HC/NOx is thermally released from the catalyst. The HC/NOx release temperature in a cold start catalyst is high enough that the released HC/NOx can be further converted by the downstream catalytic components. In addition, the cold start catalyst also exhibits excellent CO, HC, and NO oxidation activity under normal lean conditions. Both laboratory and engine evaluation results of this new concept will be presented.
机译：如今，几乎所有生产的汽车和重型卡车都安装了催化排放控制系统，以减少车辆的废气排放，以符合政府规定。一旦催化组分达到其工作温度，当前系统就可以在减少尾气排放方面实现非常高的效率。然而，它们在低于其工作温度窗口的温度下相对无效，尤其是在车辆的冷启动期间。随着政府法规的日益严格，在催化组分达到其工作温度之前的冷启动期间减少排放已成为一项重大挑战。对于冷启动HC控制，已经对基于沸石的HC捕集器进行了研究，并将其商业化用于某些应用。对于冷启动NOx控制，尤其是稀燃发动机排气中的NOx存储和释放催化剂，已经进行了评估。在本文中，我们将介绍一种新型催化剂，我们将其称为冷启动概念（CSC）催化剂技术。这种冷启动催化剂不仅可以在低温下以非常高的存储效率存储HC和NOx，而且还可以在预热期间将大部分的HC / NOx转化为其余的HC / NOx从热释放出的碳氢化合物。催化剂。冷启动催化剂中的HC / NOx释放温度足够高，以使得释放的HC / NOx可以被下游的催化组分进一步转化。此外，冷启动催化剂在正常稀薄条件下还表现出出色的CO，HC和NO氧化活性。将展示此新概念的实验室评估结果和发动机评估结果。

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