EXPERIMENTAL STUDY ON THE CHARACTERISTICS OF NANO-PARTICLE EMISSIONS FROM A HEAVY-DUTY DIESEL ENGINE USING A UREA-SCR SYSTEM

被引：23
|
作者：
Lee, S. [2 ]
Cho, Y. [2 ]
Song, M. [3 ]
Kim, H. [4 ]
Park, J. [5 ]
Baik, D. [1 ]
机构：
[1] Daejin Univ, Dept Comp Aided Mech Design Engn, Gyeonggi 487711, South Korea
[2] Kookmin Univ, Grad Sch Automot Engn, Seoul 136702, South Korea
[3] Fiber Technol Co, Res & Dev, Gyeonggi 413843, South Korea
[4] Korea Inst Machinary & Mat, Engine Res Team, Taejon 305343, South Korea
[5] Korea Automobile Testing & Res Inst, Gyeonggi 425809, South Korea
来源：
INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY | 2012年 / 13卷 / 03期
关键词：
PM (Particulate Matter); NH3; slip; SCR (Selective Catalytic Reduction); SV (Space Velocity); AOC (Ammonia Oxidation Catalyst); CPC (Condensation Particle Counter); SEM (Scanning Electron Microscopy);
D O I：
10.1007/s12239-012-0033-4
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Particulate matter in diesel engine exhaust, particularly nano-particles, can cause serious human health problems including diseases such as lung cancer. Because diesel nano-particle issues are of global concern, regulations on particulate matter emissions specify that not only the weight of particulate matter emitted but also the concentration of nano-particles must be controlled. This study aimed to determine the effects on nano-particle and PM emissions from a diesel engine when applying a urea-SCR system for NOx reduction. We found that PM weight increases by approximately 90% when urea is injected in ND-13 mode over the emission without urea injection. Additionally, PM weight increases as the NH3/NOx mole ratio is increased at 250 degrees C. In SEM scans of the collected PM, spherical particles were observed during urea injection, with sizes of approximately 200 nm to 1 mu m. This study was designed to determine the conditions under which nano-particles and PM are formed in a urea-SCR system and to relate these conditions to particle size and shape via a quantitative analysis in ND-13 mode.
引用
收藏
页码：355 / 363
页数：9
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