环境工程学报2017，Vol.11Issue(10)：5483-5489,7.DOI:10.12030/j.cjee.201611007
DOC/SCR组合方式及关键参数对NOx转化效率的影响
Influence of combinations and key parameters on NOx conversion efficiency in DOC/SCR system
摘要
Abstract
Based on the condition of medium speed of diesel engine,the NOx conversion efficiency were obtained by changing the combination modes between DOC and SCR components,varying the position of the nozzle,the intervals of two SCR substrates and the catalyst composition,in order to provide important data support for optimizing the combination mode and the key parameters.The results showed that increasing the relative distance between the urea's nozzle and the SCR substrate,NOx conversion efficiency increased,and the distance of 45 cm was the optimized distance.Increasing the interval of the SCR substrates,NOx conversion efficiency increased firstly and then decreased sharply,and the interval of 2 cm was the optimized distance.Increasing the substrate volume,and NOx conversion efficiency increased significantly,while the substrate volume was not suitable to be larger after meeting the target of NOxconversion efficiency.The NOx conversion efficiency could be significantly affected by the changing the combination mode between DOC and SCR substrate,and the pre-DOC can effectively improve the NOx conversion efficiency.Under catalytic conditions,the descending order of NOx conversion efficiency was:Copper-based ＞ Vanadium-based ＞ Iron-based;under the composite catalysts condition,the descending order was:Copper-Iron complex based ＞ Iron-Copper complex based.关键词
柴油机/尾气后处理系统/关键参数/组合方式/NOx转化效率Key words
diesel/exhaust after-treatment system/key parameters/combinations/NOx conversion efficiency分类
能源科技引用本文复制引用
孟忠伟,晋兆祥,陈超,李健,刘苗,陈秋宇,闫妍,柏威廉,方嘉..DOC/SCR组合方式及关键参数对NOx转化效率的影响[J].环境工程学报,2017,11(10):5483-5489,7.基金项目
国家自然科学基金资助项目(51106130) （51106130）
教育部“春晖计划”合作科研项目(Z2014058) （Z2014058）
发动机燃料电控系统及尾气后处理系统产业集群项目(成财教[2013]265) （成财教[2013]265）
流体及动力机械教育部重点实验室开放课题(SZJJ2016-005) （SZJJ2016-005）
西华大学重点科研基金项目(Z1120319) （Z1120319）
西华大学研究生创新基金项目(YCJJ2015040,YCJJ2016087) （YCJJ2015040,YCJJ2016087）
