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Photocatalytic NOx/HRVOC/O3 Removal in Transportation Applications

Project Summary

The focus of this research is intensive and thorough testing of two commercial photocatalytic coatings applied to portland cement concrete to provide accurate data that are representative of highway applications. While published laboratory data suggest that TiO2-based materials can remove NOx and VOCs from air samples, the tests have not been designed to be representative of outdoor air conditions. Laboratory tests in this project will emulate roadway conditions. The results of these data will be used to model the effects of using photocatalytic materials in the Houston-Galveston and Dallas-Fort Worth areas, predict the impact on air pollutant concentrations, and provide a cost-per-ton of pollutant removal among other metrics. Long-term outdoor exposure tests will also examine the performance of the materials in real near-roadway locations in two different locations with varying pollutant concentrations and environmental conditions. Another critical component of the testing will be material evaluation, examining the effects of the concrete substrate on photocatalysis, the effect of the photocatalytic process on material degradation, and the longevity of the material.

Project Number

0-6636

Status

Completed

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