A Study of an Analysis Method for Trace Substances in Vehicle Exhaust Gas

2007 ◽  
Author(s):  
Yasunori Iwakiri ◽  
Hirotaka Kanno ◽  
Hiroyuki Koyama
Keyword(s):  
Exhaust Gas ◽  
Analysis Method ◽  
Vehicle Exhaust

Performance of Visible-Light-Driven Photocatalytic Pavement in Reduction of Motor Vehicles’ Exhaust Gas

2020 ◽  
Vol 2674 (11) ◽  
pp. 512-519
Author(s):  
Zhuoying Jiang ◽  
Xiong (Bill) Yu
Keyword(s):  
Absorption Spectrum ◽  
Visible Light ◽  
Motor Vehicle ◽  
Computational Simulation ◽  
Motor Vehicles ◽  
Traffic Density ◽  
Ultraviolet Region ◽  
Exhaust Gas ◽  
Vehicle Exhaust ◽  
Three Dimensional Model

Titanium dioxide (TiO2) is a widely used photocatalyst that can oxidize motor vehicle exhaust, for example, carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons, and sulfur dioxide, under the irradiation of sunlight. It has been reported that nano-scale TiO2 particles can be effectively used to modify the concrete-asphalt pavement, and make it as a photocatalytic pavement. However, the pure TiO2 additive limits its absorption spectrum to the ultraviolet region, which only occupies a small portion of sunlight irradiance. To increase the utilization of the full spectrum of sunlight, it has been demonstrated that doping TiO2 with substances such as Carbon (C), Nitrogen (N), or metal can reduce the band-gap and extend the threshold of the absorption spectrum to the visible light region. Therefore, doped-TiO2 has a better photocatalytic performance under sunlight irradiation. This paper conducted computational simulation of the kinetics of photocatalytic pavement to quantify the efficiency of doped-TiO2 embedded pavement in reducing exhaust gas from motor vehicles. A three-dimensional model is developed on a section of local road with doped-TiO2 embedded pavement. The effects of doped-TiO2 concentration, daylight conditions, and traffic flow conditions on the removal of NOx and CO were studied. The results indicate that the pavement with doped-TiO2 coating is effective to remove CO and NOx under different traffic density and daylight intensity conditions. Compared with UV activated TiO2, visible-light-activated doped-TiO2 features significantly higher removal efficiency of poisonous exhaustive gas including NOx and CO.

Trends in Suicide Rate for England and Wales 1975–80

1984 ◽  
Vol 144 (2) ◽  
pp. 119-126 ◽  
Author(s):  
G. M. G. McClure
Keyword(s):  
Suicide Rate ◽  
Common Method ◽  
Exhaust Gas ◽  
Accidental Death ◽  
Vehicle Exhaust ◽  
England And Wales ◽  
Real Increase

SummaryThe suicide rate in England and Wales has increased annually in the period 1975 to 1980. The increase has occurred in both sexes, but has been greater for males. There has been a decrease in suicide by poisoning with solid or liquid substances (including overdoses) and a marked increase in poisoning by vehicle exhaust gas. The rate of hanging, strangulation and suffocation has also increased substantially: taken together (ICD E953) these now form the most common method of suicide in males. Statistics for ‘undetermined’ and ‘accidental’ death have been examined, and indicate that the increase in the official suicide rate represents a real increase in suicides during this period.

scholarly journals g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1274
Author(s):  
Shengchao Cui ◽  
Baowen Xie ◽  
Rui Li ◽  
Jianzhong Pei ◽  
Yefei Tian ◽  
...  
Keyword(s):  
Exhaust Gas ◽  
Gas Purification ◽  
Light Conditions ◽  
Mass Ratio ◽  
Vehicle Exhaust ◽  
Automobile Exhaust ◽  
Structure And Morphology ◽  
Ft Ir ◽  
Photocatalytic Material ◽  
Binary Composite

Vehicle exhaust seriously pollutes urban air and harms human health. Photocatalytic technology can effectively degrade automobile exhaust. This work prepared g-C3N4/CeO2 photocatalytic material by constructing heterojunctions. Four kinds of g-C3N4/CeO2 composite photocatalytic materials with different mass ratios were prepared. An indoor exhaust gas purification test was carried out under natural light and ultraviolet light irradiations. The optimum mass ratio of g-C3N4 material and CeO2 material was determined by evaluating the exhaust gas degradation effective. Moreover, the structure and morphology of the g-C3N4/CeO2 composite were investigated with microscopic characterization experiments (including XRD, TG-DSC, FT-IR, UV-Vis, SEM and XPS). The results obtained were that the optimum mass ratio of g-C3N4 material to CeO2 material was 0.75. The degradation efficiencies under ultraviolet irradiation in 60 min for HC, CO, CO2, NOX were 7.59%, 12.10%, 8.25% and 36.82%, respectively. Under visible light conditions, the degradation efficiency in 60 min for HC, CO, CO2 and NOX were 15.88%, 16.22%, 10.45% and 40.58%, respectively. This work is useful for purifying automobile exhaust in the future.

Research on Emissions Characteristics and Treatment Technology of Black Carbon for Diesel Vehicle

2014 ◽  
Vol 522-524 ◽  
pp. 172-175
Author(s):  
Chun Yan Diao ◽  
Jian Feng Li
Keyword(s):  
Comparative Analysis ◽  
Black Carbon ◽  
Carbon Emissions ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Vehicle Exhaust ◽  
Treatment Technology ◽  
Development Environment ◽  
Treatment Technologies ◽  
Diesel Vehicle

According to development environment of Diesel vehicle in recent years, emission situation, emission characteristics and treatment technologies of black carbon in diesel vehicle exhaust gas were investigated. Through comparative analysis of existing technologies, strategies and recommendations for resolving black carbon emissions were further presented so as to control or reduce the emissions of black carbon in diesel vehicle exhaust gas.

Unregulated Motor Vehicle Exhaust Gas Components

1990 ◽  
Author(s):  
D. Schuermann ◽  
K.-H. Lies ◽  
H. Klingenberg
Keyword(s):  
Motor Vehicle ◽  
Exhaust Gas ◽  
Vehicle Exhaust
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