DOI: 10.1016/j.atmosenv.2018.01.010
Scopus记录号: 2-s2.0-85040341576
论文题名: Experimental study on the particulate matter and nitrogenous compounds from diesel engine retrofitted with DOC+CDPF+SCR
作者: Zhang Y ; , Lou D ; , Tan P ; , Hu Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 177 起始页码: 45
结束页码: 53
语种: 英语
英文关键词: Diesel engine
; DOC+CDPF+SCR
; Nitrogenous compounds
; Particulate matter
; Retrofit
Scopus关键词: Catalytic oxidation
; Diesel engines
; Engines
; Exhaust gases
; Filters (for fluids)
; Laws and legislation
; Metabolism
; Nitrogen compounds
; Nitrogen oxides
; Particle size
; Particles (particulate matter)
; Particulate emissions
; Retrofitting
; Size distribution
; Urea
; After treatment devices
; Diesel oxidation catalyst
; Diesel particulate filters
; Heavy-duty diesel engine
; Nitrogenous compounds
; Particulate Matter
; Particulate matter emissions
; Retrofit
; Selective catalytic reduction
; ammonia
; fuel
; nitrogen derivative
; nitrogen dioxide
; nitrous oxide
; atmospheric pollution
; catalyst
; diesel engine
; experimental study
; filter
; nitrogen compound
; particulate matter
; pollution control
; pollution monitoring
; reduction
; Article
; catalysis
; catalytic diesel particulate filter
; China
; combustion
; diesel engine
; diesel oxidation catalyst
; particle size
; particulate matter
; priority journal
; selective catalytic reduction
; temperature
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: The increasingly stringent emission regulations will mandate the retrofit of after-treatment devices for in-use diesel vehicles, in order to reduce their substantial particulate matter and nitrogen oxides (NOX) emissions. In this paper, a combination of DOC (diesel oxidation catalyst), CDPF (catalytic diesel particulate filter) and SCR (selective catalytic reduction) retrofit for a heavy-duty diesel engine was employed to perform experiment on the engine test bench to evaluate the effects on the particulate matter emissions including particle number (PN), particle mass (PM), particle size distributions and nitrogenous compounds emissions including NOX, nitrogen dioxide (NO2)/NOX, nitrous oxide (N2O) and ammonia (NH3) slip. In addition, the urea injection was also of our concern. The results showed that the DOC+CDPF+SCR retrofit almost had no adverse effect on the engine power and fuel consumption. Under the test loads, the upstream DOC and CDPF reduced the PN and PM by an average of 91.6% and 90.9%, respectively. While the downstream SCR brought about an average decrease of 85% NOX. Both PM and NOX emission factors based on this retrofit were lower than China-Ⅳ limits (ESC), and even lower than China-Ⅴ limits (ESC) at medium and high loads. The DOC and CDPF changed the particle size distributions, leading to the increase in the proportion of accumulation mode particles and the decrease in the percentage of nuclear mode particles. This indicates that the effect of DOC and CDPF on nuclear mode particles was better than that of accumulation mode ones. The upstream DOC could increase the NO2/NOX ratio to 40%, higher NO2/NOX ratio improved the efficiency of CDPF and SCR. Besides, the N2O emission increased by an average of 2.58 times after the retrofit and NH3 slip occurred with the average of 26.7 ppm. The rate of urea injection was roughly equal to 8% of the fuel consumption rate. The DOC+CDPF+SCR retrofit was proved a feasible and effective measurement in terms of reducing particulate emissions and NOX simultaneously for in-use engine. However, it also resulted in higher N2O emission, NH3 slip as well as urea injecting strategy problem which should be of further concern. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83042
Appears in Collections: 气候变化事实与影响
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作者单位: School of Automotive Studies, Tongji University, Shanghai, China
Recommended Citation:
Zhang Y,, Lou D,, Tan P,et al. Experimental study on the particulate matter and nitrogenous compounds from diesel engine retrofitted with DOC+CDPF+SCR[J]. Atmospheric Environment,2018-01-01,177