Constructing Activity Copper Species in Cu-Zeolite for Coal-Gas-Scr and Elucidating Synergistic Catalytic Function of Cuo and Cu2+ Ion Species
Coal-gas-SCR is a low cost and effective strategy to eliminate NOx emission for iron and steel industry. In this work, Cu-ZSM-5-IE+CP catalyst prepared by liquid ion exchange combined with coprecipitation was filtered out for NOx abatement with the coke-oven gas (H2, CH4, and CO). By means of XRD, TEM, H2-TPR, EPR, UV-vis, XPS etc. technologies, active centres of Cu-ZSM-5-IE+CP were studied. Combined with DFT calculations and ab initio thermodynamic (AIT) analyses, It confirmed that highly dispersed CuO nanoparticles with (111) planes exposed and the [ZCuOH]/[Z2Cu] in 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 were 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 better deNOx efficiency
Year of publication: |
[2022]
|
---|---|
Authors: | Cheng, Jie ; Zheng, Dahai ; Xu, Ruinian ; Liu, Ning ; Dai, Chengna ; Yu, Gangqiang ; Wang, Ning ; Chen, Biaohua |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
Saved in favorites
Similar items by person
-
Zhang, Jinchang, (2003)
-
Hybrid stop schedule of urban rail train
Tan, Zheng-Min, (2015)
-
Bu, Ruijun, (2020)
- More ...