화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.36, No.8, 1249-1257, August, 2019
DOI10.1007/s11814-019-0307-x  Export Citation
Effects of regeneration conditions on sulfated CuSSZ-13 catalyst for NH3-SCR
Meiqing Shen1, 2, Zhixin Wang1, Xinhua Li1, Jiaming Wang1, Jianqiang Wang1, Chen Wang3, †, and Jun Wang1, †
  • 1Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300350, P. R. China
  • 2Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin 300350, P. R. China
  • 3School of Environmental and Safety Engineering, North University of China, Taiyuan 030051, P. R. China
E-mail:,
To understand the role of regeneration conditions on sulfur-poisoned Cu/SSZ-13 catalysts for NH3-SCR, the physicochemical characterizations and NOx conversions were investigated. The sulfur-poisoned Cu/SSZ-13 catalysts were treated at different conditions as a function of temperature and duration. TGA results revealed that regeneration at 500 °C only removed parts of sulfur spices and at 700 °C can completely remove all sulfur spices. The physical structural characterizations results illustrate that regeneration below 700 °C has no significant impact on CHA structure for Cu/SSZ-13 catalysts, while dealumination occurs on poisoned Cu/SSZ-13 when regeneration temperature is higher than 700 °C. EPR and H2-TPR results show that the sulfate decomposition and Cu migration reactions involved during regeneration and, as a result, the content of Cu2+ gradually increased as the extent of regeneration increased. The kinetics tests support that NOx conversion recovery is related to the content of Cu2+ increase during regeneration. Our study reveals that the optimum regeneration temperature is 700 °C, because severe dealumination at 750 °C inhibited Cu2+ amount increase.
Keywords:Cu/SSZ-13;NH3-SCR;Sulfur Poisoning;Regeneration;Cu Species
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