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Title: Selective catalytic reduction of NOₓ in marine engine exhaust gas over supported transition metal oxide catalysts
Authors: Jia, Chunmiao
Gao, Jiajian
Huang, Kuniadi Wandy
Jose, Vishal
Thepsithar, Prapisala
Lee, Jong-Min
Keywords: Engineering::Chemical engineering
Issue Date: 2021
Source: Jia, C., Gao, J., Huang, K. W., Jose, V., Thepsithar, P. & Lee, J. (2021). Selective catalytic reduction of NOₓ in marine engine exhaust gas over supported transition metal oxide catalysts. Chemical Engineering Journal, 414, 128794-.
Project: M4061829
Journal: Chemical Engineering Journal
Abstract: The selective catalytic reduction (SCR) of nitrogen oxides (NOx) in the presence of methanol (methanol-SCR) was investigated over commercial oxide (γ-Al2O3 and TiO2) supported transition-metal oxide catalysts in lab scale. Of all the prepared catalysts, CuO/γ-Al2O3 catalyst exhibited the highest reduction efficiency in the methanol-SCR process. The practical test results in a marine engine further showed that the 2 wt% CuO/γ-Al2O3 catalyst can remove 93.9% of NOx without catalyst deactivation in several hours. Evidenced by relevant characterization results, the fast-redox properties of copper and rich acidic sites of γ-Al2O3 support were responsible for the excellent catalytic activity of the CuO/γ-Al2O3 catalyst. Revealed by In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), formate-like species derived from methanol dehydrogenation act as the reaction intermediates for NOx reduction. Moreover, this work provides a novel process to reduce NOx and make use of adverse hydrocarbons in the flue gas simultaneously, opening a new research direction in NOx reduction technologies.
ISSN: 1385-8947
DOI: 10.1016/j.cej.2021.128794
Schools: School of Chemical and Biomedical Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2021 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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