PMID- 26354692
OWN - NLM
STAT- MEDLINE
DCOM- 20160616
LR  - 20170820
IS  - 1001-0742 (Print)
IS  - 1001-0742 (Linking)
VI  - 35
DP  - 2015 Sep 1
TI  - High NO2/NOx emissions downstream of the catalytic diesel particulate filter: An 
      influencing factor study.
PG  - 55-61
LID - S1001-0742(15)00209-0 [pii]
LID - 10.1016/j.jes.2015.02.009 [doi]
AB  - Diesel vehicles are responsible for most of the traffic-related nitrogen oxide 
      (NOx) emissions, including nitric oxide (NO) and nitrogen dioxide (NO2). The use 
      of after-treatment devices increases the risk of high NO2/NOx emissions from 
      diesel engines. In order to investigate the factors influencing NO2/NOx 
      emissions, an emission experiment was carried out on a high pressure common-rail, 
      turbocharged diesel engine with a catalytic diesel particulate filter (CDPF). NO2 
      was measured by a non-dispersive ultraviolet analyzer with raw exhaust sampling. 
      The experimental results show that the NO2/NOx ratios downstream of the CDPF 
      range around 20%-83%, which are significantly higher than those upstream of the 
      CDPF. The exhaust temperature is a decisive factor influencing the NO2/NOx 
      emissions. The maximum NO2/NOx emission appears at the exhaust temperature of 
      350 degrees C. The space velocity, engine-out PM/NOx ratio (mass based) and CO conversion 
      ratio are secondary factors. At a constant exhaust temperature, the NO2/NOx 
      emissions decreased with increasing space velocity and engine-out PM/NOx ratio. 
      When the CO conversion ratios range from 80% to 90%, the NO2/NOx emissions remain 
      at a high level.
CI  - Copyright (c) 2015. Published by Elsevier B.V.
FAU - He, Chao
AU  - He C
AD  - School of Mechanical and Traffic Engineering, Southwest Forestry University, 
      Kunming 650224, China.
FAU - Li, Jiaqiang
AU  - Li J
AD  - School of Mechanical and Traffic Engineering, Southwest Forestry University, 
      Kunming 650224, China; National Lab of Auto Performance and Emission Test, 
      Beijing Institute of Technology, Beijing 10081, China.
FAU - Ma, Zhilei
AU  - Ma Z
AD  - School of Mechanical and Traffic Engineering, Southwest Forestry University, 
      Kunming 650224, China.
FAU - Tan, Jianwei
AU  - Tan J
AD  - National Lab of Auto Performance and Emission Test, Beijing Institute of 
      Technology, Beijing 10081, China.
FAU - Zhao, Longqing
AU  - Zhao L
AD  - School of Mechanical and Traffic Engineering, Southwest Forestry University, 
      Kunming 650224, China. Electronic address: hehesmile@gmail.com.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20150606
PL  - Netherlands
TA  - J Environ Sci (China)
JT  - Journal of environmental sciences (China)
JID - 100967627
RN  - 0 (Air Pollutants)
RN  - 0 (Nitrogen Oxides)
RN  - 0 (Particulate Matter)
RN  - 0 (Vehicle Emissions)
RN  - 7U1EE4V452 (Carbon Monoxide)
RN  - S7G510RUBH (Nitrogen Dioxide)
SB  - IM
MH  - Air Pollutants/*analysis
MH  - Air Pollution/*prevention & control
MH  - Carbon Monoxide/chemistry
MH  - Environmental Monitoring
MH  - *Filtration
MH  - Kinetics
MH  - Nitrogen Dioxide/analysis
MH  - Nitrogen Oxides/*analysis
MH  - Particulate Matter/chemistry
MH  - Temperature
MH  - Vehicle Emissions/*analysis
OTO - NOTNLM
OT  - Diesel engine
OT  - Diesel particulate filter
OT  - Exhaust temperature
OT  - Nitrogen dioxide
OT  - Space velocity
EDAT- 2015/09/12 06:00
MHDA- 2016/06/17 06:00
CRDT- 2015/09/11 06:00
PHST- 2014/11/06 00:00 [received]
PHST- 2015/02/06 00:00 [revised]
PHST- 2015/02/09 00:00 [accepted]
PHST- 2015/09/11 06:00 [entrez]
PHST- 2015/09/12 06:00 [pubmed]
PHST- 2016/06/17 06:00 [medline]
AID - S1001-0742(15)00209-0 [pii]
AID - 10.1016/j.jes.2015.02.009 [doi]
PST - ppublish
SO  - J Environ Sci (China). 2015 Sep 1;35:55-61. doi: 10.1016/j.jes.2015.02.009. Epub 
      2015 Jun 6.