Simultaneous Removal of NO_x and PM over La_1-xK_xCo_1-yMn_yO₃ Perovskite-Type Catalysts

Abstract:

To study the effect of K and Mn substitution on simultaneous removal of NOx and particulate materials (PM), a series of La_1-xK_xCo_1-yMn_yO₃ (x, y=0.1, 0.2, 0.3, 0.4, 0.5) perovskite-type catalysts were synthesized by complex-combustion method. The catalytic performances of the catalysts were evaluated by temperature-programmed oxidation reaction (TPO). And the catalysts were characterized by XRD, FT-IR, H₂-TPR techniques. After introducing K and Mn to LaCoO₃ simultaneously, all the samples possess perovskite-type structures and the B-site ions form higher average oxidation state enhancing the catalytic performance obviously. La_0.8K_0.2Co_0.7Mn_0.3O₃ catalyst exhibits not only the lowest T _i(297 °C) temperature but also the lowest Tm (343 °C) temperature. Meanwhile, the NO reduction percentage over this catalyst can reach 97%.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 209-213
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.209
• Online since: July 2012
• Authors: Ting Ting Wang*, Yan Xia Hong, Hong Liang, Shu Hua Li, Qi Fen Chen, Jie Ying Cheng, Yao Chen, Dai Qi Ye
• Keywords: Catalytic Performance, NO_x, Perovskite, PM, Substitution

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