ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Advances in low-temperature hydrothermal stability of Cu/SAPO-34 zeolite

Qiang Zhang, Meng-Yun Yu, Yan-Hong Chen, Jian-Xiang Li, Hao Kang, and Hui-bing Shi

State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, China

E-mail: girlzhangqiang@163.com

Received: 1 May 2023  Accepted: 19 October 2023

Abstract:

The Cu/SAPO-34 zeolite serves as an efficient active component for the selective catalytic reduction (SCR) of nitrogen oxides (NOx) in flue gas by ammonia. Despite its commendable high-temperature hydrothermal stability, the application of Cu/SAPO-34 zeolite is limited due to low-temperature hydrothermal deactivation issues in the steam environment. In this paper, we provide a systematic review on the denitration mechanism, low-temperature hydrothermal deactivation mechanism, factors influencing its low-temperature hydrothermal stability, and the corresponding improvement measures of Cu/SAPO-34 zeolite. Additionally, the advantages and disadvantages of different methods are analyzed to offer valuable insights for future research.

Keywords: Cu/SAPO-34; SCR; Denitration mechanism; Low-temperature hydrothermal deactivation mechanism; Influence factors

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-03183-7

Chemical Papers 78 (3) 1399–1413 (2024)