Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (7): 1470.doi: 10.7503/cjcu20200197

• Articles • Previous Articles     Next Articles

Direct Synthesis of SSZ-13 Zeolite Using Tetraethylammonium Hydroxide as an Efficient Organic Template in the Presence of Conventional Aluminum and Silicon Sources

LUAN Huimin1,CHEN Wei2,WU Qinming1,*(),XU Hao1,HAN Shichao1,MENG Xiangju1,ZHENG Anmin2,XIAO Fengshou1,*()   

  1. 1. Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2020-04-11 Online:2020-07-10 Published:2020-05-11
  • Contact: Qinming WU,Fengshou XIAO E-mail:qinmingwu@zju.edu.cn;fsxiao@zju.edu.cn
  • Supported by:
    † National Natural Science Foundation of China(21720102001);National Natural Science Foundation of China(91634201);National Natural Science Foundation of China(21703203)

Abstract:

High silica CHA zeolite(SSZ-13) has been commercially applied in selective catalytic reduction of NOx with ammonia currently, but the use of costly organic templates of N,N,N-trimethyl-adamantammonium hydroxide(TMAdaOH) in the synthesis strongly limits its industrial application. To solve this problem, it is developed a synthetic route using relatively low-cost organic templates such as tetraethylammonium hydroxide(TEAOH), but in this case it is necessary to use costly high silica Y zeolite as a starting source. In this report, we for the first time show that SSZ-13 zeolite could be synthesized directly from conventional silicon and aluminum sources using TEAOH as an efficient organic template by carefully adjusting the starting gels in the presence of SSZ-13 seeds. The obtained aluminosilicate SSZ-13 product has good crystallinity, uniform crystals, and excellent hydrothermal stability. Furthermore, copper-exchanged SSZ-13 zeolite has excellent catalytic performance in NH3-SCR reaction before and after hydrothermal treatment. The combination of good catalytic performance with low-cost synthesis offers a good opportunity for wide applications of this zeolite in the future.

Key words: SSZ-13 zeolite, TEAOH, Conventional source, Design synthesis, NH3-SCR

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