Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (11): 2165-2173.doi: 10.3866/PKU.WHXB201509184

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Cu-SSZ-13 Catalyst Synthesized under Microwave Irradiation and Its Performance in Catalytic Removal of NOx from Vehicle Exhaust

Hua-Feng. YU1,Guo-Pei. ZHANG1,Li-Na. HAN1,2,Li-Ping. CHANG1,Wei-Ren. BAO1,Jian-Cheng. WANG1,*()   

  1. 1 Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, P. R. China
    2 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
  • Received:2015-08-19 Published:2015-11-13
  • Contact: Jian-Cheng. WANG E-mail:wangjiancheng@tyut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(20906067);“131 Talents Project” of Colleges and Universitiesin Shanxi Province, China, and Research Project Supported by Shanxi Scholarship Council of China(2015-039)

Abstract:

Cu-SSZ-13 catalysts had been prepared by using a microwave irradiation (MW) method and a conventional hydrothermal (CH) method, which were applied to removal of NOx from diesel vehicles by NH3. The physical and chemical properties of the samples were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, H2 temperature-programmed reduction (H2-TPR), electron paramagnetic resonance (EPR), NH3 temperature-programmed desorption (NH3-TPD), inductively coupled plasma-mass spectroscopy (ICP-MS), and X-ray photoelectron spectroscopy (XPS). The MW had some significant advantages, greatly shortening the crystallization time of SSZ-13 and improving its physical and chemical properties. The sample synthesized using MW with a crystallization time of 9 h had similar crystallinity to that synthesized by the CH with a crystallization time of 72 h. The sample synthesized by the MW had improved pore structure and amounts of Lewis (L) acid and Brönsted (B) acid. The great increase in Cu load as an active component indicated that the MW enhanced the ability of SSZ-13 to perform Cu exchange. The Cu-SSZ-13 synthesized by MW had improved low-temperature activity and anti-aging ability.

Key words: Microwave irradiation method, Conventional hydrothermal method, Cu-SSZ-13, DeNOx, Hydrothermal aging

MSC2000: 

  • O643