Transition Metal Doped MnO<sub>x</sub>-CeO<sub>2</sub>Catalysts by Ultrasonic Immersing for Selective Catalytic Reduction of NO with NH<sub>3</sub>at Low Temperature

• 作者: Cuiya Zhuang Jinshuo Qiao Kening Sun Ning Wang
• 来源期刊: 催化剂现代研究(英文)
• 学科: 化学
• 关键词: Mn-Based CATALYSTS ULTRASONIC Immersing Method Selective Catalytic Reduction SULFUR Tolerance
• 年，卷（期）: 2015,（1）
• 页码范围: 13-19
• 页数: 7页
• 分类号: O6

摘要

Transition metals doped Mn-based catalysts were prepared via ultrasonic immersing method for the selective catalytic reduction (SCR) of NOx from fuel gas. The Catalysts’ DeNOx efficiency and tolerance to sulfur were investigated in the paper. XRD results demonstrate high dispersion of Mn, Ce and M (Pr, Y, Zr, W) elements on TiO2 carrier, which is favor for reduction of active materials content. Mn-Ce-W catalyst presents uniform particle size about 500 nm to 800 nm from SEM pictures and shows the best NOx conversion of 93.2% at 200°C and 98.4% at 250°C, respectively. Sulfur tolerance analysis indicated that transition metals M can improve the catalysts’ performance when 0.01% SO2 exists in the fuel gas, because metal doping into the Mn-Ce catalyst can inhibit the sulfate deposition, especially metal sulfate, on the catalyst, which can be seen from the Fourier infrared spectrum.