Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
권호 표지
DOI QR코드

DOI QR Code

Performance Evaluation of Nitrogen Oxide Removal by Air Purification Blocks with Titanium Dioxide

이산화티타늄을 이용한 대기정화 블록의 질소산화물 제거 성능 평가

  • Oh, Ri-On (Research Center, Contecheng Co., Ltd) ;
  • Kim, Hwang-Hee (Research Center, Contecheng Co., Ltd) ;
  • Park, Sung-Ki (Contecheng Co., Ltd) ;
  • Cha, Sang-Sun (Institute of Industrial Development Research, Kongju National University) ;
  • Park, Chan-Gi (Department of Rural Construction Engineering, Kongju National University)
  • Received : 2020.07.28
  • Accepted : 2020.08.25
  • Published : 2020.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study evaluated the nitrogen oxide (NOx) removal efficiency by air purification concrete blocks with titanium dioxide (TiO2). The concrete in the mixtures had a 30% water:cement ratio, to which TiO2 was added at 0%, 5%, and 10% of cement weight. The compressive strength reduction rate and removal efficiency of NOx were investigated. The result of the compressive strength test in the study indicated that addition rate of TiO2 did not lead to signifcant effect. In terms of the average removal efficiency of NOx, mix No. 1 using a TiO2 mixing ratio of 0% had a removal efficiency of 0.57% on average; thus, the removal effect w as not significant. For the other samples prepared by mixing, the average removal efficiencies for mix No. 2 (5% TiO2) were 58.86% and 62.05% for normal and washing surface treatments, respectively, and those of sample No. 3 (10% TiO2) were 59.94% and 67.61%. mixs No. 4 (5%) and No. 5 (10%), in which TiO2 diluted with distilled water was sprayed onto the block surface, had an average NOx removal efficiency of 61.72% and 68.48%, respectively. In terms of NOx removal efficiency, Mixs No. 3 and No. 5 with 10% TiO2 were better than Mixs No. 2 and No. 4 with 5% TiO2. In addition, analyzing the NOx removal efficiency results from the fixing method, it was capable to apply mixing (washing) and the diluted spray methods. Therefore, it was found that the diluted spray method applied in this study can be employed in any manufacture of air purification concrete blocks.

Keywords

References

  1. Jung, Y. W., S. H. Lee, and J. O. Choi, 2015. Characteristics of concrete sidewalk block manufactured using stone powder sludge and photocatalytic agent. Journal of the Korea Academia-Industrial Cooperation Society 16(6): 4237-4244 (in Korean). https://doi.org/10.5762/KAIS.2015.16.6.4237
  2. Kim, H. J., 2000. Development of materials to remove nitrogen compounds (NOx) of cement. Conference of Cement Association 153: 50-54 (in Korean).
  3. Kim, H. J., 2010. A study on the development of functional concrete using permeating agents and photocatalyst. Ph.D. diss., Jeonbuk National University.
  4. Kim, H. J., Y. K. Kim, and S. J. Kwon, 2018. Evaluation of durability and self-clearing in concrete impregnated with photocatalyst-colloidal silica. Journal of the Korea Institute for Structural Maintenance and Inspection 22(5): 47-54 (in Korean). doi:10.11112/jksmi.2018.22.5.047.
  5. Kim, H. W., B. W. Jung, J. Y. Park, Y. J. Choi, and W. J. Kim, 2001. A basis study on development of photocatalystic block to purify polluted air. Journal of Korean Concrete Institute 13(2): 1117-1122 (in Korean).
  6. Kim, T. H., 2010. Study on characteristics of $TiO_{2}$ catalyst for DeNOx. Ph.D. diss., Kangwon National University.
  7. Kim, Y. K., S. J. Hong, K. B. Lee, and S. W. Lee, 2014. Evaluation of NOx removal efficiency of photocatalytic concrete for road structure. International Journal of Highway Engineering 16(5): 49-58. doi:10.7855/IJHE.2014.16.5.049.
  8. KS L 5105, 2007. Testing method for compressive strength of hydraulic cement mortars.
  9. KS L 5201, 2016. Portland cement.
  10. KS L ISO 22197-1, 2016. Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for air-purification performance of semiconducting photocatalytic materials - Part 1: Removal of nitric oxide.
  11. Park, J. Y., H. W. Kim, B. W. Jung, Y. J. Choi, Y. H. Kim, and H. J. Kim, 2001. An experimental study on the NOx removal properties of photocatalystic paint. Journal of Korean Concrete Institute 13(2): 1123-1128 (in Korean).
  12. Youn, Y. S., S. S. Seo, S. H. Cho, P. S. Kim, and T. K. Kim, 2013. The empirical evaluation on the NOx removal of photocatalytic plaster. Journal of Korean Concrete Institute 25(2): 305-306 (in Korean). https://doi.org/10.4334/JKCI.2013.25.3.305