The role of alkali metal ions on hydrothermal stability of Cu/SSZ-13 NH3-SCR catalysts

C Wang, W Yan, Z Wang, Z Chen, J Wang, J Wang… - Catalysis Today, 2020 - Elsevier
Cu/SSZ-13 has considered being a good candidate for NH 3-SCR catalysts. However, in
real world, Cu/SSZ-13 inevitably expose to alkali metals deposit and hydrothermal aging …

Unexpected increase in low-temperature NH3-SCR catalytic activity over Cu-SSZ-39 after hydrothermal aging

J Du, Y Shan, Y Sun, M Gao, Z Liu, X Shi, Y Yu… - Applied Catalysis B …, 2021 - Elsevier
The control of nitrogen oxides (NO x) from heavy-duty diesel vehicles is becoming
increasingly urgent due to its detrimental effects on the environment. Cu-SSZ-39, with its …

Methane partial oxidation by monomeric Cu active center confined on ZIF-7

H Lee, C Kwon, C Keum, HE Kim, H Lee, B Han… - Chemical Engineering …, 2022 - Elsevier
The monomeric cupric ion (Cu 2+) species coordinated to four nitrogen ligands (CuN 4) is
recognized as a possible active site for particulate methane monooxygenase (pMMO) of the …

Recent Understanding of Low-Temperature Copper Dynamics in Cu-Chabazite NH3-SCR Catalysts

H Lei, V Rizzotto, A Guo, D Ye, U Simon, P Chen - Catalysts, 2021 - mdpi.com
Dynamic motion of NH3-solvated Cu sites in Cu-chabazite (Cu-CHA) zeolites, which are the
most promising and state-of-the-art catalysts for ammonia-assisted selective reduction of …

Insights into hydrothermal aging of phosphorus-poisoned Cu-SSZ-13 for NH3-SCR

K Xie, J Woo, D Bernin, A Kumar… - Applied Catalysis B …, 2019 - Elsevier
Automotive catalysts are continuously exposed to different poisons and to high temperature,
which result in hydrothermal aging. Phosphorus is one of the poisons that the catalyst could …

N2O Formation Mechanism During Low-Temperature NH3-SCR over Cu-SSZ-13 Catalysts with Different Cu Loadings

D Yao, B Liu, F Wu, Y Li, X Hu, W Jin… - Industrial & Engineering …, 2021 - ACS Publications
Based on the in situ DRIFTS studies, the mechanism of formation and decomposition of
NH4NO3 (decomposition to N2O) over Cu-SSZ-13 with different Cu loadings was …

Interpretation of NH3-TPD Profiles from Cu-CHA Using First-Principles Calculations

L Chen, TVW Janssens, M Skoglundh, H Grönbeck - Topics in Catalysis, 2019 - Springer
Temperature-programmed desorption (TPD) with ammonia is widely used for zeolite
characterization revealing information on acidity and adsorption sites. The interpretation of …

Investigation of the robust hydrothermal stability of Cu/LTA for NH3-SCR reaction

A Wang, P Arora, D Bernin, A Kumar… - Applied Catalysis B …, 2019 - Elsevier
Recently copper ion-exchanged LTA zeolites were proved to be robust for NH 3-SCR
reaction. In this study, Cu/LTA catalysts with Si/Al= 15 and Cu/Al= 0.4 were synthesized via …

Understanding enhancement of strong Copper-Yttrium interactions on catalytic properties of Cu/Y-SSZ-13 for NH3-SCR

N Kang, Y Wang, ZW Chen, X Tang, Y Wang… - Chemical Engineering …, 2023 - Elsevier
Cu-SSZ-13 represents one of the most promising catalysts for selective catalytic reduction of
NO x with ammonia (NH 3-SCR), but it has remained challenging to gain superior low …

[HTML][HTML] Insight into the SO2 poisoning mechanism for NOx removal by NH3-SCR over Cu/LTA and Cu/SSZ-13

A Wang, L Olsson - Chemical Engineering Journal, 2020 - Elsevier
In this study, Cu/LTA and Cu/SSZ-13 catalysts are examined for sulfur poisoning and
regeneration. The nature of the Cu species was probed with H 2-TPR and in-situ DRIFTS …