EVALUATION METHOD FOR THE NO_x REMOVAL PERFORMANCE OF PHOTOCATALYTIC CEMENT PRODUCTS

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  • MURATA Yoshihiko
    Ube-Mitsubishi Cement Research Institute Corporation, Saitama Center
  • TOBINAI Keishi
    Ube-Mitsubishi Cement Research Institute Corporation, Saitama Center

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  • 光触媒を利用したセメント系材料のNO_x除去性能測定方法に関する研究
  • ヒカリ ショクバイ オ リヨウ シタ セメントケイ ザイリョウ ノ NOx ジョキョ セイノウ ソクテイ ホウホウ ニ カンスル ケンキュウ

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Abstract

Photocatalytic cement-based materials show environment purifying capability and can be used as a NO_x removing paving block, for which we have developed a performance evaluation system with an apparatus capable of supplying an imitated emission air continuously. Studying the relation between NO_x removing performance and test conditions such as NO concentrations, flow rate and relative humidity, an optimum test condition was determined : air gap of 5 mm, NO concentration in the imitated emission air of 1 ppm, flow rate of the imitated emission air of 1.5 to 3.0 liter/mm, relative humidity of the imitated emission air of 10 % or 50 % and UV irradiation of 6 W/m^2.

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