Issue 7, 2022

Constructing active copper species in Cu-zeolites for coal-gas-SCR and elucidating the synergistic catalytic function of CuO and Cu2+ ion species

Abstract

Coal-gas-SCR, initially proposed in this work, is a low-cost and effective strategy to eliminate NOx emission in the iron and steel industry. In this work, the Cu-ZSM-5-IE+CP catalyst prepared by liquid ion exchange combined with coprecipitation was filtered out for NOx abatement with coke-oven gas (H2, CH4, and CO). By means of XRD, TEM, H2-TPR, EPR, UV-vis, XPS, etc., active centers of Cu-ZSM-5-IE+CP were studied. Combined with DFT calculations and ab initio thermodynamic (AIT) analyses, it was confirmed that highly dispersed CuO nanoparticles with the (111) planes exposed and [ZCuOH]/[Z2Cu] in the Z[Cu(II)]-6R-D4h structure are the most possible main active motifs for the coal-gas-SCR. Moreover, the synergistic effect of Cu2+ ions and CuO species was elucidated. In situ DRIFTS and SCR-TPD results revealed that surface species can migrate between CuO and Cu2+ ions, which could further accelerate intermediate species (NCO, CH3NO, and NH4+) formation, resulting in better deNOx efficiency.

Graphical abstract: Constructing active copper species in Cu-zeolites for coal-gas-SCR and elucidating the synergistic catalytic function of CuO and Cu2+ ion species

Supplementary files

Article information

Article type
Paper
Submitted
21 Marts 2022
Accepted
07 Maijs 2022
First published
12 Maijs 2022

Environ. Sci.: Nano, 2022,9, 2372-2387

Constructing active copper species in Cu-zeolites for coal-gas-SCR and elucidating the synergistic catalytic function of CuO and Cu2+ ion species

J. Cheng, D. Zheng, C. Dai, R. Xu, N. Liu, G. Yu, N. Wang and B. Chen, Environ. Sci.: Nano, 2022, 9, 2372 DOI: 10.1039/D2EN00269H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements