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Effect of Fineness of Cement on the NOx removal Performance of Photocatalytic Cement Paste

시멘트 분말도가 광촉매 시멘트 페이스트의 질소산화물(NOx) 제거 성능에 미치는 영향

  • Received : 2021.07.01
  • Accepted : 2021.08.17
  • Published : 2021.08.30

Abstract

In this study, we researched a method to increase the photocatalytic reaction efficiency of TiO2 particles while fixing TiO2 to the concrete surface using cement paste. For this purpose, we analyzed effects of cement fineness on the surface area and air purification performance of hardened cement paste containing TiO2. At the test level of this study, it was confirmed that the lower the fineness of OPC shows the better the NO and NOx removal rates, indicating better air purification performance. To identify the cause, the particle size distribution of the cement, the roughness of the surface of the hardened paste, and the lightness were analyzed. The results of the analysis show that the lower the fineness of cement, the surface roughness increases, so the exposed area of TiO2 contained in the paste also increases. As a result, NOx removal rate is improved when the lower the fineness of cement.

Keywords

Acknowledgement

이 연구는 2021년도 한국환경산업기술원의 연구비 지원에 의한 연구개발사업 결과의 일부임. 과제번호:RE202001104

References

  1. Back, H., Park, J., & Seung, I. (2019). A Study on NO Removal Efficiency of Titanium Dioxide by Binder and Pigment, Journal of Korean Society of Environmental Engineers, 41(2), 109~116 https://doi.org/10.4491/KSEE.2019.41.2.109
  2. Beeldens, A. (2006). Environmental Freindly Concrete Pavement Blocks:Air Purification in the Centre of Antwerp, 8th International Conference on Concrete Block Paving, Nov.6-8, San Francisco
  3. Cassar, L., Beeldens, A., Pimpinelli, N., & Guerrini, G. (2007). Photocatalysis of cementitious materials. In Proceedings of the International RILEM Symposium on Photocatalysis, Environment and Construction Materials, Florence, Italy, 131~145
  4. Dalton, S., Janes, A., Jones, G., Nicholson, A., Hallam, R., & Allen, C. (2002). Photocatalytic oxidation of NOx gases using, TiO2: a surface spectroscopic approach, Environmental Pollution, 120, 415~422 https://doi.org/10.1016/S0269-7491(02)00107-0
  5. Frazer, L. (2001). Titanium Dioxide:Environmental White Knights?, Environmental Health Perspectives, Vol.109, No.4
  6. Katzman, L. (2006). Building Toward a Cleaner Environment : A New Role for an Existing Product, TiO2, Sasaki Associates Inc.
  7. Kim, H., Kim, Y., & Kwon, S. (2018). Mechanical Performance Evaluation in Concrete Impregnated with Silicate for TiO2 Utilization, Journal of the Korean Recycled Construction Resource Institute, 6(2), 108~114 https://doi.org/10.14190/JRCR.2018.6.2.108
  8. Korea Institute of Civil and Building Technology(KICT) (2015). Development of Technology of Photocatalytic Concrete and Commercialized Approach, KICT 2015-226
  9. Lee, J., Kim, Y., & Lee, S. (2015). Experimental Study on the Long-term Performance of TiO2 Concrete for Road Structures, Journal of the Korean Society of Civil Engineers, 35(3), 691~698 https://doi.org/10.12652/Ksce.2015.35.3.0691
  10. Oh, R., Kim, H., Lee, J., Sung, S., & Park, S. (2017). Characteristics of Nitrogen Oxide Reduction in Concrete Pavement Block using TiO2, Proceedings of the Korean Society of Agricultural Engineers Conference, 163
  11. Rhee, I., Lee, J., Kim, J., & Kim, J. (2018). Nitrogen Oxides Mitigation Efficiency of Cementitious Materials Incorporated with TiO2. Materials. 11, 877 https://doi.org/10.3390/ma11060877
  12. Sopyan, I., Watanabe, M., Murasawa, S., Hashimoto, K., & Fujishima, A. (1996). Anecient TiO2 thin-film photocatalyst : Photocatalytic properties in gas-phase acetaldehyde degradation. Journal of Photochemistry and Photobiology A Chemistry, 98, 79~86 https://doi.org/10.1016/1010-6030(96)04328-6
  13. Vautier, M., Guillard, C., & Herrmann, M. (2001). Photocatalytic Degradation of Dyes in Water: Case Study of Indigo and of Indigo Carmine, Journal of Catalysis, 201, 46~59 https://doi.org/10.1006/jcat.2001.3232
  14. Zouzelka, R., & Rathousky, J. (2017). Photocatalytic abatement of NOx pollutants in the air using commercial functional coating with porous morphology, Applied Catalysis B: Environmental, 217, 466~476 https://doi.org/10.1016/j.apcatb.2017.06.009