基于PM与NOx协同作用的现代柴油机DPF主被动复合再生及微粒捕集、再生微观理化特性基础理论研究

项目名称： 基于PM与NOx协同作用的现代柴油机DPF主被动复合再生及微粒捕集、再生微观理化特性基础理论研究

项目编号： No.51276128

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 能源与动力工程

项目作者： 李志军

作者单位： 天津大学

项目金额： 75万元

中文摘要： 柴油机由于压缩比大、动力性强、燃烧效率高、比油耗低以及CO、HC排放较少等特点，其应用十分广泛。但其PM排放较高，对环境和人体危害很大。DPF作为一种能够有效去除PM的手段而具有很高的研究价值，其再生问题更是研究的重点和难点。本项目拟采用一种DPF的主被动协同再生方法，从微观理化特性入手，通过分析PM捕集再生过程中NOx与PM的协同作用，建立相关化学反应动力学和热力学模型，利用数值模拟、理化分析等手段探究NOx催化去除PM的协同作用机理和规律及影响因素，实现DPF被动再生；同时辅以DOC和排气管燃油喷射等，实现DPF主动再生；优化柴油机与新型复合后处理催化系统的耦合，达到柴油机DPF主被动协同循环再生的目的。本项目深入开展柴油机DPF再生的基础理论和基本规律研究，为研制和推广柴油机应用DPF技术提供重要的理论基础，为我国柴油车尾气排放满足日益严格的排放法规要求提供坚实的理论基础和应用保障。

中文关键词： 柴油机；碳烟颗粒物；氮氧化物；反应机理；主被动复合再生

英文摘要： Nowadays diesel engine is in wide application around the world due to its high compression ratio, strong power output, high combustion efficiency, low specific fuel consumption and low CO and HC emissions. However, diesel engine suffers high level PM emission, which is extremely harmful to human body. This project plans to develop an active-passive combinational regeneration strategy. By analyzing the coupled reaction between PM and NOx during the soot loading process with micro-scaled physicochemical property investigation, the reaction kinetics model and thermodynamics model is established. Through simulation and physicochemical characteristic analysis, the coupled reaction mechanisms and relative parameters are investigated. Passive regeneration is applied, combined with active regeneration by adding diesel oxidation catalyst and pipeline fuel injection. The combination of diesel engine and novel diesel aftertreatment system is optimized to attain active-passive combinational regeneration. The project focuses on the basic theory and mechanism research of DPF regeneration, which will provide theoretical foundation for the development and application of DPF technology. Finally, the research will serve as a grounded theory support to meet the more and more stringent diesel emission regulations in China.

英文关键词： Diesel；PM；NOx；Reaction mechanism；Active-passive combinational regeneration