Preparation and characterization of Ni-Ti-O mixed oxide for selective catalytic reduction of NO under lean-burn conditions

doi:10.1016/S1872-2067(12)60614-7

Chinese Journal of Catalysis

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Preparation and characterization of Ni-Ti-O mixed oxide for selective catalytic reduction of NO under lean-burn conditions

YUAN Deling, LI Xinyong, ZHAO Qidong

School of Environmental Science and Technology, State Key Laboratory of Fine Chemical, Key Laboratory of Industrial Ecology and Environmental Engineering of Ministry of Education, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2013-02-27 Revised:2013-05-10 Online:2013-07-16 Published:2013-07-16
Supported by:
This work was supported by the National Natural Science Foundation of China (21250110513, 51178076).

Abstract

Abstract: A novel Ni-Ti-O mixed-oxide catalyst was prepared by a homogeneous coprecipitation method and tested in the selective catalytic reduction of NO by propene (C₃H₆-SCR) in the presence of excess O₂. Catalysts with different molar ratios of Ni-Ti were characterized using X-ray diffraction, N₂ adsorption-desorption, pyridine adsorption, temperature-programmed desorption, and in-situ Fourier-transform infrared spectroscopy. The Ni₁Ti₁ catalyst showed good activity in C₃H₆-SCR at 430 ℃ and the NO_x conversion achieved 68%. This catalyst displayed an anatase structure and had a high surface area (149 m²/g), which is helpful to enhance the catalyst activity. Lewis acid sites were beneficial for adsorbing nitrate, which was the main intermediate produced during the SCR of NO by C₃H₆.

Key words: Ni-Ti-O mixed oxide, Selective catalytic reduction, Nitrogen monoxide, Propene

YUAN Deling, LI Xinyong, ZHAO Qidong. Preparation and characterization of Ni-Ti-O mixed oxide for selective catalytic reduction of NO under lean-burn conditions[J]. Chinese Journal of Catalysis, DOI: 10.1016/S1872-2067(12)60614-7.

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https://www.cjcatal.com/EN/Y2013/V34/I7/1449

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Preparation and characterization of Ni-Ti-O mixed oxide for selective catalytic reduction of NO under lean-burn conditions

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