Chinese Journal of Chemical Engineering ›› 2021, Vol. 32 ›› Issue (4): 159-167.doi: 10.1016/j.cjche.2020.09.021

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Catalytic ozonation of volatile organic compounds (ethyl acetate) at normal temperature

Jiahao Cui1, Shejiang Liu1, Hua Xue2, Xianqin Wang1, Ziquan Hao1, Rui Liu2, Wei Shang1, Dan Zhao1, Hui Ding1,3   

  1. 1 School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
    2 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    3 Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
  • Received:2019-11-19 Revised:2020-08-09 Online:2021-04-28 Published:2021-06-19
  • Contact: Hui Ding
  • Supported by:
    This work was supported by the National Key R&D Program of the Ministry of Science and Technology, China (Grant No. 2018YFC0705304); and the Key Scientific and Technological Support Projects, Tianjin City, China (Grant No. 19YFZCSF01090).

Abstract: Catalytic treatments of VOCs at normal temperature can greatly reduce the cost and temperature of processing, and improve the safety factor in line with the requirements of green chemistry. Activated carbon fiber (ACF) was pretreated with 10% H2SO4 by single factor optimization to increase specific surface area and pore volume obviously. The catalytic ozonation performance of ACF loaded with Au, Ag, Pt and Pd noble metals on ethyl acetate was investigated and Pd/ACF was selected as the optimal catalyst which had certain stability. Pd is uniformly distributed on the surface of ACF, and Palladium mainly exists in the form of Pd0 with a amount of Pd+2. The specific surface area of the catalysts gradually decreases as the loading increases. The activation energy of ethyl acetate calculated by Arrhenius equation is 113 kJ·mol-1. With 1% Pd loading and the concentration ratio of ozone to ethyl acetate is 3:1, catalytic ozonation performance is maximized and the conversion rate of ethyl acetate reached to 60% in 30-50℃ at 15,000-30,000 h-1.

Key words: Catalytic ozonation, Normal temperature, Activated carbon fiber, Ethyl acetate, Noble metal catalysts