Correlation of Physicochemical Characteristics of Supported by a Nanorod with NO Removal by CO
Publication: Journal of Environmental Engineering
Volume 146, Issue 1
Abstract
In this study, cobalt oxides were loaded on a nanorod and synthesized using a hydrothermal method and wet impregnation to reduce nitrogen monoxide (NO) by carbon monoxide (CO). A series of catalysts were characterized by nitrogen physisorption, high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray spectroscopy (XPS), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to determine the reacting path in the reduction zones. Co species were highly dispersed on the nanorod when the precursor solution content was less than 20% by weight. species were the most active components in the reaction, and the fraction reached a maximum when the precursor concentration was 10% by weight. A possible mechanism for the reaction was suggested in which NO adsorbs onto the surface of and transforms to some nitrite/nitrate species under the reacting condition. At lower temperature (), adsorbed CO species react with a nitro complex to generate and , whereas as the temperature increases, these nitro complexes transform to coordinate nitrates reacting with CO species to generate nontoxic and .
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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 financially supported by the National Key R&D Program of China (2017YFB0602902).
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Journal of Environmental Engineering
Volume 146 • Issue 1 • January 2020
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©2019 American Society of Civil Engineers.
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Received: Jan 8, 2019
Accepted: May 7, 2019
Published online: Nov 12, 2019
Published in print: Jan 1, 2020
Discussion open until: Apr 12, 2020
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