DOI: 10.1016/j.atmosenv.2014.07.032
Scopus记录号: 2-s2.0-84907732565
论文题名: On-road measurement of regulated pollutants from diesel and CNG buses with urea selective catalytic reduction systems
作者: Guo J ; , Ge Y ; , Hao L ; , Tan J ; , Li J ; , Feng X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 99 起始页码: 1
结束页码: 9
语种: 英语
英文关键词: CNG
; Diesel
; NOx
; Particulate
; SCR
Scopus关键词: CNG
; Diesel
; Particulate
; Regulated pollutants
; Urea-selective catalytic reduction
; Thyristors
; carbon dioxide
; carbon monoxide
; diesel fuel
; nitrous oxide
; urea
; catalysis
; diesel
; emission control
; emission inventory
; natural gas
; nitrogen oxides
; particle size
; particulate matter
; performance assessment
; reduction
; size distribution
; urea
; Article
; catalyst
; controlled study
; hypobarism
; oxidation
; particulate matter
; pollutant
; pollution monitoring
; portable emission measurement system
; selective catalytic reduction
; Beijing [Beijing (ADS)]
; Beijing [China]
; China
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: In this study, emissions from 13 buses operated in Beijing, including two Euro-III diesel buses, four Euro-IV diesel buses, three Euro-V diesel buses and four Euro-V CNG buses, were characterized in real world conditions. All of the buses tested were fitted with selective catalytic reduction (SCR) systems except for the Euro-III diesel buses. A SEMTECH-DS was used for testing the gaseous pollutants, and an electric low pressure impactor (ELPI) was used for measuring of particle numbers and size distributions. A comparison was made based on emission performance of these buses by employing the VSP approach and fuel- based emissions factors. Diesel buses emitted less CO and THC but more NOx and PM pollutants than CNG buses. The NOx reduction efficiencies of the SCR systems for CNG buses were higher because of the high exhaust temperature and high NO2/NOx ratio, whereas the efficiencies for diesel buses were lower. This resulted in extremely low NOx emissions from CNG buses, but the high NO2/NOx ratio needs further study. Failures of urea injection in the SCR systems were detected in this research, which resulted in very high NOx emissions. The CNG buses also emitted smaller numbers of particles and less particle mass with the presence of oxidation catalysts. Diesel buses satisfying the Euro-V standard performed better than Euro-IV and Euro-III diesel buses in terms of emission performance, except for more nuclei mode particles. Most of time, the Euro-IV diesel buses show no advantages in CO and NOx emissions compared with the Euro-III diesel buses. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80495
Appears in Collections: 气候变化事实与影响
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作者单位: National Lab of Auto Performance and Emission Test, School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing, China; School of Mechanical and Traffic Engineering, Southwest Forestry University, Kunming, China
Recommended Citation:
Guo J,, Ge Y,, Hao L,et al. On-road measurement of regulated pollutants from diesel and CNG buses with urea selective catalytic reduction systems[J]. Atmospheric Environment,2014-01-01,99