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Effect of CO-SCR by CTAB modified vanadosilicate molecular sieve on low temperature catalytic denitrification |
HE Han-bing1,2,3, FU Guo-you2, ZHANG Li2, ZENG Jing2, WANG Yu-si2, LONG Hong-ming1, FAN You-qi1, ZHENG Ya-jie2, MA Ying4 |
1. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Ministry of Education), Anhui University of Technology, Maanshan 243002, Anhui, China; 2. School of Metallurgy and Environment, Central South University, Changsha 410083, China; 3. National Key Laboratory of Environmental Protection Mining and Metallurgy Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, China; 4. Yonker Environmental Protection Co., Ltd., Changsha 410001, China |
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Abstract To improve the NO-CO low-temperature selective catalytic reduction (SCR) denitration rate, finding new effective denitration catalysts has become the focus of the denitration field. A vanadium-substituted molecular sieve AM-6 was synthesized by hydrothermal method, the performance of AM-6 molecular sieve was improved by surfactant-assisted synthesis. The effect of different amounts of CTAB on the morphology, composition and the catalytic reduction performance was studied. These catalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the addition of CTAB does not introduce other impurity elements. When the ratio of CTAB to V is 1:4, AM-6(1/4CTAB) has more regular surface morphology, better crystalline formability, well-balanced ratio of V5+/V4+,and the denitrification activity reaches 81.54% at 150℃, which is reduced by 50℃ than the temperature at which the denitrification activity of AM-6 reaches 80%.
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Received: 19 November 2020
Published: 20 December 2021
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