柴油机排气颗粒物与氮氧化物氧化反应的基础研究

项目名称： 柴油机排气颗粒物与氮氧化物氧化反应的基础研究

项目编号： No.51206119

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 宾峰

作者单位： 天津大学

项目金额： 26万元

中文摘要： 柴油机氧化催化器（DOC）+颗粒物氧化催化器（POC）是柴油机尾气净化的有效手段之一，但其中的PM-NOx氧化反应机理和NO2生成/转化机制尚需深入研究。项目针对DOC+POC技术中的基础理论问题开展研究，旨在建立NOx催化氧化反应及柴油机颗粒物氧化反应中间产物的评价方法，阐明反应条件对NOx氧化反应及O2/NOx-PM反应活性和选择性的影响规律，提出两个反应的微观反应机理；建立柴油机富氧排气条件下NOx氧化反应和O2/NOx-PM反应的理论模型及其与排气流体动力学的耦合模型，阐明反应条件、NOx生成/转化规律、颗粒物净化效果之间的相互关系；确定真实柴油机运行条件下，反应条件对颗粒物净化效率和NO2排放量的影响规律，提出颗粒物净化系统设计参数和柴油机运行条件的优化策略。以上工作将为兼顾颗粒物高效净化及NO2二次污染物控制的柴油机DOC+POC后处理技术发展提供必要的理论指导。

中文关键词： 柴油机；颗粒物；氮氧化物；氧化反应；

英文摘要： Diesel oxidation catalytic converter (DOC) coupled with particulate oxidation catalytic converter (POC) have been employed as one of the effective means for the diesel exhaust purification. However, further investigation related to the particulate matter (PM) -NOx reaction mechanisms and NO2 formation/conversion regularities are still required. This research addresses the action mechanisms and conversion regularities of the soot oxidation promoted by NOx in diesel exhaust gas. The purpose of this work is to establish the evaluation methods for NOx catalyzed reaction and the intermediate species during the PM oxidation, elucidate the effects of reaction conditions on NOx oxidation, the activity and selectivity of O2/NOx-PM reaction, and put forward micro-mechanisms for both NOx oxidation and O2/NOx-PM reaction. The objective of the work is also to establish the theoretical models for both two reactions in oxygen-enriched atmosphere and the exhaust dynamics coupling models of NOx and PM, estimate interactions of reaction conditions, NOx formation/conversion regularities and the PM abatement, ascertain the effects of reaction condition on the PM eliminatation and the discharge amount of NO2, and put forward design parameters of PM purification system as well as the optimized strategy of diesel running conditions. T

英文关键词： diesel engine；particulate matter；nitrogen oxides；oxidation reaction；