Issue 13, 2023

Highly effective and energy-saving removal of NO through an adsorption–microwave catalytic decomposition method under complex flue gas at low temperature

Abstract

Low-temperature NO decomposition with high efficiency and low energy consumption remains a huge challenge. Herein, we reported a novel adsorption–microwave catalytic decomposition method for the deep removal of NO using NaY-MgCo2O4-40%BaCO3 as the bi-functional adsorbent/catalyst material under complex flue gas. At room temperature, under the condition of excess O2, NO was first adsorbed on the bi-functional material for concentration, and then the adsorbed NO was quickly decomposed into N2 and O2 by microwave (MW) catalysis at a low temperature of 250 °C. It was found that the conversion of adsorbed NO reached 99.5% after only 15 min of microwave irradiation. NaY-MgCo2O4-40%BaCO3 had excellent recyclability with a high NO removal rate of 98.2% in the 4-cycles’ operation. Moreover, the application of the adsorption–microwave catalytic decomposition method for denitrification under complex flue gas (the presence of SO2 or CO2) was studied for the first time, and NaY-MgCo2O4-40%BaCO3 showed superior resistance to SO2 and CO2. This work provides a new and attractive approach for the deep removal of NOx at low temperature without adding an additional reducing agent, and it is green, efficient and energy-saving.

Graphical abstract: Highly effective and energy-saving removal of NO through an adsorption–microwave catalytic decomposition method under complex flue gas at low temperature

Article information

Article type
Research Article
Submitted
18 Jan 2023
Accepted
19 Feb 2023
First published
20 Feb 2023

Inorg. Chem. Front., 2023,10, 3808-3820

Highly effective and energy-saving removal of NO through an adsorption–microwave catalytic decomposition method under complex flue gas at low temperature

C. Yu, Y. Yi, J. Zhou and W. Xu, Inorg. Chem. Front., 2023, 10, 3808 DOI: 10.1039/D3QI00126A

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