scholarly journals Study on Application of TiO2 Photocatalytic Materials in Purification of Highway Tunnel Tail Gas

2021 ◽  
Vol 233 ◽  
pp. 01073
Author(s):  
Zhiqiang Liu ◽  
Haifeng Jiang ◽  
Minmin Yuan
Keyword(s):  
Air Pollutants ◽  
Present Situation ◽  
Chemical Pollution ◽  
Exhaust Gas ◽  
Nano Tio2 ◽  
Automobile Exhaust ◽  
Highway Tunnel ◽  
Biological Pollution ◽  
Narrow Space ◽  
Photocatalytic Materials

In recent years, with the continuous expansion of the scale of highway tunnels in China, the problem of tail gas pollution in highway tunnels has become increasingly prominent. The tunnel is a long and narrow space, which makes air pollutants easy to accumulate and difficult to diffuse. In this paper, the present situation and application scenarios of TiO2 photocatalytic materials in the purification technology of highway tunnel exhaust gas are studied and analyzed, and the nano TiO2 photocatalytic materials which can be applied to highway tunnels, corresponding highway stations and their affiliated facilities are put forward, so as to greatly degrade automobile exhaust gas, atmospheric chemical pollution and environmental biological pollution.

scholarly journals Preparation Technique and Properties of Nano-TiO2 Photocatalytic Coatings for Asphalt Pavement

2018 ◽  
Vol 8 (11) ◽  
pp. 2049 ◽  
Author(s):  
Hui Wang ◽  
Ke Jin ◽  
Xinyu Dong ◽  
Shihao Zhan ◽  
Chenghu Liu
Keyword(s):  
Water Permeability ◽  
Degradation Rate ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Exhaust Gas ◽  
Preparation Technique ◽  
Tio2 Content ◽  
Nano Tio2 ◽  
Evaluation Indexes ◽  
Technical Requirements

According to the characteristics of asphalt pavement, a kind of nano-TiO2 photocatalytic coating was prepared by using the emulsified asphalt as the carrier. All of its properties met the technical requirements. An exhaust gas degradation test device and its test steps were developed. The evaluation indexes, cumulative degradation rate, and degradation efficiency, were put forward. From the two aspects of the nano-TiO2 content in photocatalytic coatings and the spraying amount of photocatalytic coatings in the surface of slabs (300 mm × 300 mm), the exhaust gas degradation effects, the performances of skid resistance, and the water permeability of asphalt mixture were analyzed. The test results showed that the cumulative degradation rate of exhaust gas was better when nano-TiO2 content was increased in the range of 0–8% and the spraying amount was changed in the range of 0–333.3 g/m2. In practical engineering applications, the anti-skid performance of asphalt pavement can be satisfied when the spraying amount of photocatalytic coating was limited to under 550 g/m2. The spraying amount of nano-TiO2 photocatalytic coating had little effect on the water permeability of the asphalt mixture. Therefore, 8% nano-TiO2 content in the coating and a 400 g/m2 spraying amount were finally recommended based on the photocatalytic properties, as well as for economic reasons.

Danger of Automobile Exhaust Gas

1920 ◽  
Vol 1 (1supp) ◽  
pp. 64-66 ◽  
Author(s):  
Van. H. Manning
Keyword(s):  
Exhaust Gas ◽  
Automobile Exhaust

Reforming of toluene with simulated automobile exhaust gas over hydrotalcite-like-compound-derived Ni catalyst

2020 ◽  
Vol 209 ◽  
pp. 106545
Author(s):  
Mii Betchaku ◽  
Yoshinao Nakagawa ◽  
Masazumi Tamura ◽  
Keiichi Tomishige
Keyword(s):  
Ni Catalyst ◽  
Exhaust Gas ◽  
Automobile Exhaust

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.

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