Method for catalytically degrading automobile tail gas based on stone mastic asphalt pavement

Abstract

The invention relates to a method for catalytically degrading automobile tail gas based on a stone mastic asphalt (SMA) pavement, and belongs to the technical field of SMA pavements. The problems of no catalytic degradation of the automobile tail gas, poor nano-TiO2 dispersibility and poor catalytic degradation effect of existing SMA pavements are solved. Lanthanum and copper ions are adopted as adoping agent to modify TiO2, a lignin stabilizer is used as an adsorbent, a lanthanum-copper codoped modified TiO2 supported lignin stabilizer is prepared by a sol-gel technology, and the lanthanum-copper codoped modified TiO2 supported lignin stabilizer is mixed with SMA; the pavement performances and the catalytic degradation effect of main components of the tail gas are evaluated; and the pavement performances and the catalytic degradation test results of the SMA are comprehensively compared, the concentration of a lanthanum nitrate and copper sulfate solution is adjusted, and the optimumdoping amount of lanthanum and copper in TiO2 loaded on the lignin stabilizer is determined through repeated test, so the SMA is used to pave the SMA pavement with an automobile tail gas catalytic degradation function. The method can be used in the practices of the SMA pavement, and is great significance to reduce air pollution and improve the air environment quality.

Description

Technical field [0001] The invention is a method for catalytically degrading automobile exhaust based on asphalt mastic macadam (SMA) pavement, and belongs to the technical field of SMA pavement. Background technique [0002] With the continuous development of technology and economy, my country’s motorization level is getting higher and higher, which brings convenience to our lives, but it also brings traffic pollution and other problems. China has become a global motor vehicle for eight consecutive years. In the country with the largest production and sales volume, motor vehicle exhaust has become the main source of air pollution in my country, as well as an important cause of particulate matter and photochemical pollution. Exhaust gas emitted by motor vehicles has become the main source of urban air pollution, affecting people's health. Long-term exposure to automobile exhaust will directly stimulate the human respiratory tract, resulting in a decrease in the immunity of the re...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method based on SMA pavement catalytic degradation of automobile exhaust, to solve the problem of non-catalytic degradation of automobile exhaust on SMA pavement, nano TiO 2 The problem of poor dispersion and poor catalytic degradation effect, endow SMA pavement with the function of degrading automobile exhaust and improving air quality

[0009] In view of the fact that the current SMA pavement has no catalytic degradation function of automobile exhaust, nano-TiO 2 The problem of poor dispersion and poor catalytic degradation effect, the present invention prepares loaded lanthanum-copper co-doped modified TiO 2 The lignin stabilizer is used in SMA pavement, providing a method for catalytic degradation of automobile exhaust based on SMA pavement