Effect of Calcination Conditions on Catalytic Efficiency for NO Oxidation
Publication: Journal of Environmental Engineering
Volume 147, Issue 10
Abstract
Calcination conditions in the catalyst preparation process have a significant influence on catalyst performance. To explore the optimal calcination condition of catalysts for NO oxidation, a series of samples was prepared using the same support and active compound but under different calcination conditions. The catalytic efficiency of the catalyst was tested, and through characterization [X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE SEM), Brunauer–Emmett–Teller analysis (BET), and Barrett–Joyner–Halenda analysis (BJH)], the effect of calcination conditions on the catalytic performance was analyzed and discussed. The results showed that the samples calcined at 600°C for 5 h had the best catalytic performance. At a reaction temperature of 450°C, the molar ratio of conversion was as much as 1.65. The high surface area, crystal phase, and crystallinity (the relative content of is about 50%); the high content of lattice oxygen (about 20.4%); and high dispersion of active sites on the catalyst calcined at 600°C for 5 h led to its relatively high catalytic activity. Compared with traditional noble metal catalysts, the catalyst prepared by the impregnation method has good application prospects because of its low material cost, simple preparation process, and superior catalytic performance.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (51906193) and the Basic Research Program of Natural Science in Shaanxi Province (2020JQ-039).
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Received: Nov 5, 2020
Accepted: May 28, 2021
Published online: Jul 28, 2021
Published in print: Oct 1, 2021
Discussion open until: Dec 28, 2021
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