Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst
Science Discovery
Volume 5, Issue 6, November 2017, Pages: 463-468
Received: Nov. 16, 2017; Published: Nov. 21, 2017
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Authors
Huixian Pan, Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China
Li Wang, Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China; Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, China
Shuanling He, Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China
Jie Wang, Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China
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Abstract
Modified sol-gel method was adopted to prepare TiO2-ZrO2 carrier of molar ratio 4:1, and the catalysts were prepared by impregnating with WO3 and MnOx-CeOx sequentially. The carriers and catalysts were characterized by X ray diffraction (XRD) and electron scanning electron microscopy (SEM), and their NH3-SCR denitrification activity and sulfur resistance were investigated at low temperature. The results shown that mixing zirconium oxychloride with butyl titanate ethanol solution first and then titrating acetic acid inhibitor would have more Zr4+ substituted Ti4+ doping into the TiO2 lattice, resulting in more lattice defects and active sites. The surface morphology of carriers were all nano particles, but the carrier prepared by modified method shown smaller particle size and better dispersion. The catalyst which was calcined at 200°C for 2.5h exhibited best NH3-SCR performance, its denitrification activity reached 98% at 100°C, and the NOx conversion could be maintained at about 75% after continuously injecting SO2 (100ppm) for 8h.
Keywords
Sol-Gel, Selective Catalytic Reduction, TiO2, ZrO2
To cite this article
Huixian Pan, Li Wang, Shuanling He, Jie Wang, Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst, Science Discovery. Vol. 5, No. 6, 2017, pp. 463-468. doi: 10.11648/j.sd.20170506.22
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