[논문]이산화티타늄을 이용한 대기정화 블록의 질소산화물 제거 성능 평가

오리온; 김황희; 박성기; 차상선; 박찬기

doi:10.5389/ksae.2020.62.5.039

Abstract ▼ AI-Helper

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 remov...

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.

주제어

표/그림 (18)

그림 Fig. 1 Titanium dioxide (TiO₂, anatase type)
표 Table 1 Properties of cement
표 Table 2 Characteristics of titanium dioxide (TiO₂)
그림 Fig. 2 Fixing methods for TiO₂ incorporation into air purification concrete blocks through mixing or using a diluted spray application
표 Table 3 Mix design of air purification concrete blocks
그림 Fig. 3 Image of the air purification concrete blocks washing process
그림 Fig. 5 Schematic diagram of the pollutant reactor
그림 Fig. 4 Air purification concrete blocks specimens
그림 Fig. 6 Photograph of the test set-up for nitrogen oxide (NO_x) removal
그림 Fig. 7 Compressive strength test results
그림 Fig. 8 Results of NOx removal test for mix No. 1 with 0% TiO₂ addition
그림 Fig. 9 Results of the NOx removal test for the No. 2 mix (5% TiO₂) prepared using general/normal and washing surface treatments
그림 Fig. 10 Results of the NO_x removal test for mix No. 3 with 10% TiO₂ prepared with a general/normal surface treatment or washing surface treatment
그림 Fig. 11 Results of the NO_x removal test for mix No. 4 with 5% TiO₂ incorporated as a diluted spray
그림 Fig. 12 Results of the NO_x removal test for the No. 5 mix with 10% TiO₂ applied as a diluted spray
그림 Fig. 13 NO_x removal effi ciency of fixing method 1 (mixing) for mixs No. 2 (5% TiO₂) and No. 3 (10% TiO₂) with normal surface treatment and washing surface treatment
그림 Fig. 14 NO_x removal efficiency from 5% (No. 4) and 10% (No. 5) TiO₂ samples prepared using the diluted spray method
표 Table 4 NO_x removal efficiency according tho the fixation method of TiO₂

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

가설 설정

3. The study did not evaluate the change of NO_x removal efficiency for long-term period. In future study, there is a need to evaluate the NO_x removal efficiency for long-term period with the TiO₂ addition rate.

제안 방법

However, in this study, the NOx removal effect was evaluated by applying the method of spraying TiO2 on the concrete block surface in consideration of maintenance.
The study examined NOx removal by air purification concrete blocks treated with titanium dioxide (TiO2) under the conditions of automobile/agricultural machine, in which NOx was present in the exhaust gas.
This study also examined the NO_x removal efficiency according to the percentage of TiO₂ additive, the surface treatment method, and the fabrication/fixing method; NO₁, NO₂, and NO_x results were averaged for each mix. The average removal efficiency for mix No.
This study evaluated the effect of TiO₂ on the removal of NO_x from exhaust gas by air purification concrete blocks. The compressive strength was assessed according to the mixing rate of TiO₂, and the removal efficiency of NO_x was assessed according to the mixing ratio and fixation method of TiO₂.

대상 데이터

This study used type I ordinary Portland cement; Table 1 lists the physical properties.

이론/모형

Compressive strength tests were performed by the KS L 5105.
This study carried out our tests according to KS L ISO 22197-1 “Fine ceramics (advanced ceramics, advanced technical ceramics)-Test method for air-purification performance of semiconducting photocatalytic materials-Part 1: Removal of nitric oxide,” which uses a NOx pollutant reactor.

성능/효과

1. Compared to the mix not applying TiO₂, compressive strengths in the mixs with 5% and 10% TiO₂ were reduced by 4.93% and 1.05%, respectively. However, the change in compressive strength was not large.
2. In this study, it was observed that the NO_x removal efficiency was improved as the addition rate of TiO₂ increases. And, the mixing (washing) and diluted spray methods provided better NO_x removal efficiency, compared to the one by the fixing method (normal).
The NO₁, NO₂, and NO_x removal efficiencies for the No. 4 mix with a TiO₂ mixing rate of 5% were 64.51%, 58.81%, and 61.86%, respectively. The concentrations of NO₁, NO₂, and NO_x discharged for 60 min from the No.
The NO₁, NO₂, and NO_x removal efficiencies of the No. 3 mix with 10% TiO₂ were 61.99%, 56.19%, and 61.68%, respectively, for the general/normal surface treatment and 69.93%, 63.40%, and 69.51%, respectively for the washing surface treatment. Changes in NO₁, NO₂, and NO_x concentrations discharged over a 60-min period for sample No.
57%. The average removal efficiencies of NO_x for mix No. 2 (5% TiO₂) were 58.86% and 62.05%, with general/normal and washing surface treatments, respectively; for the No. 3 mix (10% TiO₂), the average removal efficiencies were 59.94% and 67.61%, respectively (Fig. 13).

참고문헌 (12)

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).

원문보기 상세보기
Kim, H. J., 2000. Development of materials to remove nitrogen compounds (NOx) of cement. Conference of Cement Association 153: 50-54 (in Korean).
Kim, H. J., 2010. A study on the development of functional concrete using permeating agents and photocatalyst. Ph.D. diss., Jeonbuk National University.
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.
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).
Kim, T. H., 2010. Study on characteristics of $TiO_{2}$ catalyst for DeNOx. Ph.D. diss., Kangwon National University.
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.
KS L 5105, 2007. Testing method for compressive strength of hydraulic cement mortars.
KS L 5201, 2016. Portland cement.
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.
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).
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).

원문보기 상세보기

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

이산화티타늄을 이용한 대기정화 블록의 질소산화물 제거 성능 평가
Performance Evaluation of Nitrogen Oxide Removal by Air Purification Blocks with Titanium Dioxide 원문보기

Abstract ▼ AI-Helper

주제어

표/그림 (18)

표/그림 (18)

AI 본문요약
AI-Helper

가설 설정

제안 방법

대상 데이터

이론/모형

성능/효과

참고문헌 (12)

이 논문을 인용한 문헌

저자의 다른 논문 :

관련 콘텐츠

원문 보기

원문 URL 링크

오픈액세스(OA) 유형

이 논문과 함께 이용한 콘텐츠

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

이산화티타늄을 이용한 대기정화 블록의 질소산화물 제거 성능 평가 Performance Evaluation of Nitrogen Oxide Removal by Air Purification Blocks with Titanium Dioxide 원문보기

Abstract ▼ AI-Helper

주제어

표/그림 (18) 모든 표/그림 보기

표/그림 (18) 슬라이드로 보기

AI 본문요약 엑셀 다운로드 AI-Helper

가설 설정

제안 방법

대상 데이터

이론/모형

성능/효과

참고문헌 (12)

이 논문을 인용한 문헌

저자의 다른 논문 :

차상선 (9)

관련 콘텐츠

원문 보기

원문 URL 링크

오픈액세스(OA) 유형

이 논문과 함께 이용한 콘텐츠

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

이산화티타늄을 이용한 대기정화 블록의 질소산화물 제거 성능 평가
Performance Evaluation of Nitrogen Oxide Removal by Air Purification Blocks with Titanium Dioxide 원문보기

표/그림 (18)

표/그림 (18)

AI 본문요약
AI-Helper