Heavy duty diesel engine exhaust aerosol particle and ion measurements.
Heavy duty EURO 4 diesel engine exhaust particle and ion size distributions were measured atthetailpipe using dynamometer testing. Measurements of particle volatility and electrical charge were undertaken to clarify diesel exhaust nucleation mode characteristics with different exhaust after-treatment systems. Nucleation mode particle volatility and charging probability were dependent on exhaust after-treatment particles were volatile and uncharged when the engine was equipped with diesel particulate filter and partly volatile and partly charged in exhaust without any after-treatment or with an oxidation catalyst only. The absence of charged particles in the nucleation mode of diesel particulate filtered exhaust excludes the ion mediated process as a nucleation particle formation mechanism.
Lähde
Tero
T
Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P. O. Box 692, FIN -33101, Tampere, Finland.
Rönkkö
Topi
T
Virtanen
Annele
A
Schuck
Tanja J
TJ
Pirjola
Liisa
L
Hämeri
Kaarle
K
Kulmala
Markku
M
Arnold
Frank
F
Rothe
Dieter
D
Keskinen
Jorma
J
D000336:Aerosols / Q000032:analysis*; D002244:Carbon / Q000032:analysis; D007477:Ions; D018986:Motor Vehicles; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D012995:Solubility; D001335:Vehicle Emissions / Q000032:analysis*
D000336:Aerosols; D007477:Ions; D052638:Particulate Matter; D001335:Vehicle Emissions; D002244:Carbon