提高PN过滤效率的DPF涂层技术开发  

Development of DPF Coating Technology for the Improvement of PN Filtration Efficiency

作　　者：陶汉国[1] 汪利峰 杜建波[1] 冯曦[1] 钱枫 TAO Han-guo;WANG Li-feng;DU Jian-bo;FENG Xi;QIAN Feng(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300;Heibei Yili Technology Co.,Ltd.,Qinghe Hebei 054800;School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]中国汽车技术研究中心有限公司,天津300300 [2]河北亿利科技股份有限公司,河北清河054800 [3]武汉科技大学汽车与交通工程学院,武汉430081

出　　处：《中国环保产业》2022年第9期40-44,共5页China Environmental Protection Industry

基　　金：武汉市知识创新专项基础研究项目——氨氢融合储能系统与零碳动力装置基础研究(2022010801010305)

摘　　要：在满足重型柴油车国VI排放标准的后处理系统开发中,具有挑战性的任务之一是使壁流式柴油颗粒过滤器(DPF)和催化剂涂层技术满足颗粒数量(PN)排放要求。为了提高PN过滤效率,开发了一种新型DPF涂层技术,在入口通道的多孔壁表面上涂覆了一层薄薄的催化剂,使表面孔隙变小,从而改善了PN过滤效率。为了平衡DPF的PN过滤效率和压降,本文研究了催化剂粒径、涂层负载量和催化层长度对PN过滤效率和压降的影响。In the development of a after-treatment system to meet the Limits and Measurement Methods for Emissions from Diesel Fueled Heavy-Duty Vehicles(China VI),one of the most challenging tasks is to meet the particle number(PN)emission requirements via the wall-flow diesel particle filter(DPF)and the catalyst coating technology.In order to improve the PN filtration efficiency,a novel DPF coating technology was developed.With this technology,the porous wall surface in the inlet channel can be coated with a thin catalytic layer(on-wall coating),which makes the surface pores smaller,thus improving the PN filtration efficiency.In order to balance the PN filtration efficiency and pressure drop of DPF,the particle size distribution(PSD)of catalyst,the washcoat loading(WCL)and the catalytic layer length were adjusted in this paper,and the effects of these key parameters on PN filtration efficiency and pressure drop were researched through experiments.

关 键 词：柴油颗粒过滤器 颗粒物 颗粒数量 壁面涂覆 压降 

分 类 号：X734.2[环境科学与工程—环境工程]