Catalytic combustion of volatile organic compounds over CuO-CeO2 supported on SiO2-Al2O3 modified glass-fiber honeycomb

HE Dan; LIU Lai-shuan; REN Jun; HU Tuo-ping

Volume 45 Issue 3

Mar. 2017

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HE Dan, LIU Lai-shuan, REN Jun, HU Tuo-ping. Catalytic combustion of volatile organic compounds over CuO-CeO2 supported on SiO2-Al2O3 modified glass-fiber honeycomb[J]. Journal of Fuel Chemistry and Technology, 2017, 45(3): 354-361.

Citation:

HE Dan, LIU Lai-shuan, REN Jun, HU Tuo-ping. Catalytic combustion of volatile organic compounds over CuO-CeO₂ supported on SiO₂-Al₂O₃ modified glass-fiber honeycomb[J]. Journal of Fuel Chemistry and Technology, 2017, 45(3): 354-361.

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Catalytic combustion of volatile organic compounds over CuO-CeO₂ supported on SiO₂-Al₂O₃ modified glass-fiber honeycomb

School of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China

Funds:

Foundation of Shanxi Province project 2009011011-4

International Scientific and Technological Cooperation Projects of Shanxi Province 2015081043

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Corresponding author: LIU Lai-shuan, Tel:+86 351 3922271, Fax:+863513922118, E-mail:liulaishuan@nuc.edu.cn
Received Date: 2016-11-14
Rev Recd Date: 2017-01-23

Available Online: 2021-01-23

Publish Date: 2017-03-10

Abstract

Abstract

CuO-CeO₂ monolithic catalysts supported on SiO₂-Al₂O₃ modified glass-fiber honeycomb were prepared via co-impregnation method and their performance in the oxidation of volatile organic compounds (VOCs) such as ethyl acetate, isopropanol and toluene was evaluated. Various techniques such as N₂ sorption, X-ray powder diffraction (XRD), hydrogen-temperature programmed reduction (H₂-TPR), ammonia-temperature programmed desorption (NH₃-TPD) and chemisorption of VOCs were employed to characterize the catalysts. The results show that the copper oxide species are highly dispersed on the CuO-CeO₂ based catalysts; moreover, the size of CeO₂ nanoparticles increases with the decrease of copper/ceria molar ratio. The addition of ceria oxide can evidently increase the amount of total acid sites, especially the Lewis ones, which can enhance the adsorption capacity of ethyl acetate and isopropanaol and promote the oxidation of ethyl acetate and isopropanaol. In the case of toluene combustion, the addition of large amount of CeO₂ may decrease the reducibility and oxygen activation capability; as a result, it contributes little to the adsorption of toluene, resulting in a low activity in the oxidation of toluene. The catalytic activity is related both to the reactivity of surface oxygen and to the adsorption capacity of the catalyst towards VOC molecules, which are determined by the complex interactions among copper, cerium oxide and the support.
- volatile organic compounds,
- catalytic oxidation,
- ethyl acetate,
- isopropanol,
- toluene,
- CuO,
- CeO₂,
- glass-fiber honeycomb

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References(36)

References

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