Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (1): 71-78.DOI: 10.1016/S1872-2067(17)62870-5

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Growth of Cu/SSZ-13 on SiC for selective catalytic reduction of NO with NH3

Tiaoyun Zhoua,b,c,d, Qing Yuanb,e, Xiulian Panb, Xinhe Baob   

  1. a Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;
    b State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    c University of Chinese Academy of Sciences, Beijing 100049, China;
    d School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
    e Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, Liaoning, China
  • Received:2017-03-07 Revised:2017-05-15 Online:2018-01-18 Published:2018-01-19
  • Contact: 10.1016/S1872-2067(17)62870-5
  • Supported by:

    This work was supported by the INCOEmission project coordinated by BASF SE, Germany. Qing Yuan acknowledges the support from the Fundamental Research Funds for the Central Universities (DC201502080409).

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Abstract:

Silicon carbide (SiC) was used as a support for SSZ-13 zeolite in an attempt to improve the high-temperature stability and activity of Cu/SSZ-13 in the selective catalytic reduction (SCR) of NO with NH3. SSZ-13 was grown via a hydrothermal method using the silicon and silica contained in SiC as the source of silicon, which led to the formation of a chemically bonded SSZ-13 layer on SiC. Characterization using X-ray diffraction, scanning electron microscopy, and N2 adsorption-desorption isotherms revealed that the alkali content strongly affected the purity of zeolite and the crystallization time affected the coverage and crystallinity of the zeolite layer. Upon ion exchange, the resulting Cu/SSZ-13@SiC catalyst exhibited enhanced activity in NH3-SCR in the high-temperature region compared with the unsupported Cu/SSZ-13. Thus, the application temperature was extended with the use of SiC as the support.

Key words: Zeolite, SSZ-13, Silicon carbide, Selective catalytic reduction by ammonia