Citation: Xiaona Liu, Yi Cao, Nana Yan, Chao Ma, Lei Cao, Peng Guo, Peng Tian, Zhongmin Liu. Cu-SAPO-17: A novel catalyst for selective catalytic reduction of NO_x[J]. Chinese Journal of Catalysis, ;2020, 41(11): 1715-1722. doi: 10.1016/S1872-2067(20)63609-9 shu

Cu-SAPO-17: A novel catalyst for selective catalytic reduction of NO_x

Xiaona Liu ^a,b, ,
Yi Cao ^a,c ,
Nana Yan ^a,b ,
Chao Ma ^a,b,d ,
Lei Cao ^a ,
Peng Guo ^a ,
Peng Tian ^a ,
Zhongmin Liu ^a

a National Engineering Laboratory for Methanol to Olefins, State Energy Low Carbon Catalysis and Engineering R&D Center, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b University of Chinese Academy of Sciences, Beijing 100049, China;
c School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China;
d Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 21 February 2020
Revised Date: 29 March 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (21972136, 21676262, 21606221, 21991091) and the Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-JSC040).

The high-temperature (HT) and low-temperature (LT) hydrothermal stabilities of molecular-sieve-based catalysts are important for the selective catalytic reduction of NO_x with ammonia (NH₃-SCR). In this paper, we report a catalyst, Cu²⁺ loading SAPO-17, synthesized using cyclohexylamine (CHA), which is commercially available and inexpensive and is utilized in NH₃-SCR reduction for the first time. After systematic investigations on the optimization of Si and Cu²⁺ contents, it was concluded that Cu-SAPO-17-8.0%-0.22 displays favorable catalytic performance, even after being heated at 353 K for 24 h and at 973 K for 16 h. Moreover, the locations of CHAs, host-guest interaction and the Brönsted acid sites were explored by Rietveld refinement against powder X-ray diffraction data of as-made SAPO-17-8.0%. The refinement results showed that two CHAs exist within one eri cage and that the protonated CHA forms a hydrogen bond with O4, which indicates that the proton bonding with O4 will form the Brönsted acid site after the calcination.
- SAPO-17 molecular sieve,
- Rietveld refinement,
- Host-guest interaction,
- Selective catalytic reduction by ammonia (NH₃-SCR),
- Hydrothermal stability,
- Location of Cu²⁺
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Cu-SAPO-17: A novel catalyst for selective catalytic reduction of NOx

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Cu-SAPO-17: A novel catalyst for selective catalytic reduction of NO_x