NOx Reduction Catalysts for Vehicle Emission Control

1971 ◽  
Author(s):  
G. H. Meguerian ◽  
C. R. Lang
Keyword(s):  
Nox Reduction ◽  
Emission Control ◽  
Vehicle Emission ◽  
Reduction Catalysts

Nox Reduction Catalysts for Vehicle Emission Control

1972 ◽  
Author(s):  
G. H. Meguerian ◽  
F. W. Rakowsky ◽  
E. H. Hirschberg ◽  
C. R. Lang ◽  
D. N. Schock
Keyword(s):  
Nox Reduction ◽  
Emission Control ◽  
Vehicle Emission ◽  
Reduction Catalysts

scholarly journals Evaluating Vehicle Emission Control Policies using on-Road Mobile Measurements and Continuous Wavelet Transform: a Case Study during the Asia-Pacific Economic Cooperation Forum, China 2014

2016 ◽  
Author(s):  
Ziqiang Tan ◽  
Yanwen Wang ◽  
Chunxiang Ye ◽  
Yi Zhu ◽  
Yingruo Li ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Air Quality ◽  
Continuous Wavelet Transform ◽  
Vehicle Emissions ◽  
Emission Control ◽  
Control Policy ◽  
Asia Pacific ◽  
Vehicle Emission ◽  
Continuous Wavelet ◽  
Asia Pacific Economic Cooperation

Abstract. Vehicle emissions are major sources of atmospheric pollutants in urban areas, especially in megacities around the world. Various vehicle emission control policies have been implemented to improve air quality. However, the effectiveness of these policies is unclear, due to a lack of systematic evaluation and sound methodologies. During the Asia-Pacific Economic Cooperation (APEC) Forum, China 2014, the Chinese government implemented the strictest vehicle emission control policy in the country's history, which provided an opportunity to evaluate its effectiveness, based on our recently developed method. To evaluate the vehicle emission reduction, we used a mobile research platform to measure the main air pollutants (PM2.5, black carbon (BC), SO2, CO, NOx and O3) on the 4th ring road of the city of Beijing, combined with a continuous wavelet transform method (CWT) to separate out "instantaneous emissions" by passing vehicles. The results suggested that our measurements captured the spatial distribution and variation of atmospheric pollutant concentrations on the 4th ring road. The "instantaneous concentration" decomposed by the CWT method represents on-road emissions better than other methods reported in the literature. With this method, we found that the daytime vehicle emission of CO and NOx decreased by 28.1 and 16.3 %, respectively, during the APEC period relative to the period before APEC, and by 39.3 and 38.5 %, respectively, relative to the period after APEC. The nighttime vehicle emissions of CO and NOx decreased by 56.0 and 60.7 %, respectively, during the APEC period relative to the period after APEC. Because vehicle emissions of NOx and CO contribute considerably to the total emissions of these pollutants in Beijing, the vehicle emission control policy implementation was extremely successful in controlling air quality during APEC 2014, China.

Historical evaluation of vehicle emission control in Guangzhou based on a multi-year emission inventory

2013 ◽  
Vol 76 ◽  
pp. 32-42 ◽  
Author(s):  
Shaojun Zhang ◽  
Ye Wu ◽  
Huan Liu ◽  
Xiaomeng Wu ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Emission Inventory ◽  
Emission Control ◽  
Vehicle Emission

SUPPORTED METALS IN VEHICLE EMISSION CONTROL

2005 ◽  
pp. 283-325 ◽  
Author(s):  
Arturo Martínez–Arias ◽  
José C. Conesa ◽  
Marcos Fernández–García ◽  
James A. Anderson
Keyword(s):  
Emission Control ◽  
Vehicle Emission ◽  
Supported Metals

scholarly journals Re-evaluating effectiveness of vehicle emission control programmes targeting high-emitters

2020 ◽  
Vol 3 (11) ◽  
pp. 904-907 ◽  
Author(s):  
Yuhan Huang ◽  
Nic C. Surawski ◽  
Yat-Shing Yam ◽  
Casey K. C. Lee ◽  
John L. Zhou ◽  
...  
Keyword(s):  
Emission Control ◽  
Vehicle Emission ◽  
Control Programmes
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