https://scholars.lib.ntu.edu.tw/handle/123456789/406442
Title: | NOx abatement from stationary emission sources by photo-assisted SCR: Lab-scale to pilot-scale studies | Authors: | Yu J.C.C. Nguyen V.-H. Lasek J. Chiang S.-W. Li D.X. Wu J.C.S. |
Keywords: | Desulfurization;Lab-scale;NOx abatement;Photo-assisted SCR;Photocatalyst;Pilot-scale | Issue Date: | 2016 | Journal Volume: | 523 | Start page/Pages: | 294-303 | Source: | Applied Catalysis A: General | Abstract: | In developing a higher activity for NOx abatement from stationary emission sources, photo-assisted selective catalytic reduction (photo-SCR) was systematically investigated over TiO2 supported on a spherical £\-Al2O3/£^-Al2O3. The formation of NO2 was virtually suppressed in the reaction temperature range of 110¡V200?¢XC. The NOx removal efficiencies of TiO2/£^-Al2O3 photocatalyst at 120?¢XC for real flue gas (in pilot-scale photoreactor) and simulated flue gas (in lab-scale photoreactor) were 68¡V75% and 43.5%, respectively, in the presence of reducing reagent (C4H10). SEM and XPS techniques revealed that sulfur temporarily occupied the active sites of the photocatalyst, causing deactivation. Spent TiO2/£^-Al2O3 photocatalyst was regenerated via desulfurization by either air or hydrogen at 400¡V500?¢XC. The effects of regeneration temperature and regeneration time on the photocatalytic activity are methodically investigated, demonstrating that using hydrogen at 500?¢XC in 1?h could completely regenerate the spent photocatalyst. ? 2016 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/406442 | ISSN: | 0926860X | DOI: | 10.1016/j.apcata.2016.06.020 |
Appears in Collections: | 化學工程學系 |
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