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Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

by Xinbo Zhu 1,2,*, Yaolin Wang 2, Yu Huang 2 and Yuxiang Cai 2
1
Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
2
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(12), 2430; https://doi.org/10.3390/app8122430
Received: 11 October 2018 / Revised: 4 November 2018 / Accepted: 7 November 2018 / Published: 30 November 2018
(This article belongs to the Section Chemistry)
In this work, a series of Ce-W-Ti catalysts were synthesized using a solution combustion method for the selective catalytic reduction (SCR) of NO with NH3 at low temperatures. The reaction performance of NH3-SCR of NO was significantly improved over the Ce-W-Ti catalysts compared to Ce0.4Ti and W0.4Ti catalysts, while Ce0.2W0.2Ti showed the best activity among all the samples. The Ce0.2W0.2Ti catalyst exhibited over 90% removal of NO and 100% N2 selectivity in the temperature range of 250–400 °C at a gas hourly space velocity (GHSV) of 120,000 mL·g−1·h−1. The Ce-W-Ti catalysts were characterized using N2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectrometry and temperature programmed desorption of NH3 to establish the structure-activity relationships of the Ce-W-Ti catalysts. The excellent catalytic performance of the Ce0.2W0.2Ti catalyst could be associated with the larger specific surface area, highly dispersed Ce and W species, increased amount of surface adsorbed oxygen (Oads) and enhanced total acidity on the catalyst surfaces. View Full-Text
Keywords: SCR; nitrogen oxides; Ce-W-Ti; solution combustion method SCR; nitrogen oxides; Ce-W-Ti; solution combustion method
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Zhu, X.; Wang, Y.; Huang, Y.; Cai, Y. Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method. Appl. Sci. 2018, 8, 2430.

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