ReviewRecent advances in the selective catalytic reduction of NOx with NH3 on Cu-Chabazite catalysts

- Cu-CHA catalyst marks a great breakthrough in NH3-SCR area due to excellent hydrothermal stability.
- The state of Cu in the reaction was introduced.
- The preparation methods were compared and the reaction mechanism was outlined.
- The comparison between Cu-SSZ-13 and Cu-SAPO-34 catalysts was made.

The development of Cu-chabazite (CHA) catalysts, i.e. Cu-SSZ-13 and Cu-SAPO-34, represents a significant technology breakthrough for the removal of NOx by selective catalytic reduction (SCR) with ammonia. Cu-CHA catalysts show an excellent hydrothermal stability towards high temperature aging and wide active temperature windows for the ammonia SCR reaction. This work summarizes the recent progress in the development of the Cu-CHA catalysts for the NH3-SCR reaction. The state of Cu in the reaction and the preparation methods on the catalytic performance are discussed. The advances in the understanding of the reaction mechanism are reviewed. The hydrothermal stability of the typical Cu-CHA catalysts are compared.

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