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

doi:10.1016/j.cjche.2020.09.021

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 Ding^1,3

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:2021-06-19 Published:2021-04-28
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).

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 Ding^1,3

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

通讯作者: Hui Ding
基金资助:
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

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

摘要： 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.

关键词: Catalytic ozonation, Normal temperature, Activated carbon fiber, Ethyl acetate, Noble metal catalysts

Jiahao Cui, Shejiang Liu, Hua Xue, Xianqin Wang, Ziquan Hao, Rui Liu, Wei Shang, Dan Zhao, Hui Ding. Catalytic ozonation of volatile organic compounds (ethyl acetate) at normal temperature[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 159-167.

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

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

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