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Catalysts
Volume 15
Issue 2
10.3390/catal15020109
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Analysis of CeO2-Supported Ru Catalysts for an Efficient Catalytic Wet Air Oxidation of Reconstituted Tobacco Wastewater

by
Guanfan Qian
1,
Fan Zhong
1,
Hongliang Lu
2,
Huangbin Chen
1,
Jianzai Shi
3,
Pengfei Ma
2,
Xiaohua Deng
2,
Zhengzhong Fang
2,
Nuowei Zhang
1,*,
Quanxing Zheng
2,* and
Binghui Chen
1
1
Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
2
Technology Center, China Tobacco Fujian Industrial Co., Ltd., Xiamen 361021, China
3
Fujian Jinmin Reconstituted Tobacco Development Co., Ltd., Fuzhou 350600, China
*
Authors to whom correspondence should be addressed.
Catalysts 2025, 15(2), 109; https://doi.org/10.3390/catal15020109
Submission received: 3 December 2024 / Revised: 29 December 2024 / Accepted: 6 January 2025 / Published: 23 January 2025
(This article belongs to the Special Issue Advanced Catalytic Materials and Processes for Water/Wastewater Treatment)
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Abstract

CeO2-supported noble metal catalysts show great application potential in the catalytic oxidation of volatile organic compounds and hazardous organic wastewater. In this paper, an efficient Ru/CeO2 catalyst is developed by combining the oxygen affinity of noble metals and the redox of supports for catalytic wet air oxidation (CWAO) of reconstituted tobacco wastewater. First, what factors affect the catalytic performance are studied by investigating the effect of supports (C, TiO2, Al2O3, and CeO2) and noble metals (Pt, Pd, and Ru) on the activity. Second, the catalytic performance of Ru/CeO2 is further enhanced by tuning the morphology of CeO2 supports. The results indicate that the Ru/CeO2-R (rod-like) catalyst is highly active and can reach a high TOC conversion of 97.6% at 220 °C in 1 h. In contrast, the TOC conversions of Ru/CeO2-MOF, Ru/CeO2-NP (nanoparticle), and Ru/CeO2-C (cube-like) are 93.3, 77.9, and 68.2%, respectively. Ru/CeO2-R also presented good stability. The TOC conversion can be maintained at approximately 85% in four consecutive cycles. The characterization results indicate that better Ru dispersion, higher Ce3+ content, more surface reactive oxygen species, electron transfer between Ru and CeO2-R, and oxygen transfer from CeO2-R to Ru are the main reasons for the best catalytic performance of the Ru/CeO2-R catalyst.
Keywords: ceria morphology; Ce3+ fraction; oxygen activation and transfer; catalytic wet air oxidation ceria morphology; Ce3+ fraction; oxygen activation and transfer; catalytic wet air oxidation
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MDPI and ACS Style

Qian, G.; Zhong, F.; Lu, H.; Chen, H.; Shi, J.; Ma, P.; Deng, X.; Fang, Z.; Zhang, N.; Zheng, Q.; et al. Analysis of CeO2-Supported Ru Catalysts for an Efficient Catalytic Wet Air Oxidation of Reconstituted Tobacco Wastewater. Catalysts 2025, 15, 109. https://doi.org/10.3390/catal15020109

AMA Style

Qian G, Zhong F, Lu H, Chen H, Shi J, Ma P, Deng X, Fang Z, Zhang N, Zheng Q, et al. Analysis of CeO2-Supported Ru Catalysts for an Efficient Catalytic Wet Air Oxidation of Reconstituted Tobacco Wastewater. Catalysts. 2025; 15(2):109. https://doi.org/10.3390/catal15020109

Chicago/Turabian Style

Qian, Guanfan, Fan Zhong, Hongliang Lu, Huangbin Chen, Jianzai Shi, Pengfei Ma, Xiaohua Deng, Zhengzhong Fang, Nuowei Zhang, Quanxing Zheng, and et al. 2025. "Analysis of CeO2-Supported Ru Catalysts for an Efficient Catalytic Wet Air Oxidation of Reconstituted Tobacco Wastewater" Catalysts 15, no. 2: 109. https://doi.org/10.3390/catal15020109

APA Style

Qian, G., Zhong, F., Lu, H., Chen, H., Shi, J., Ma, P., Deng, X., Fang, Z., Zhang, N., Zheng, Q., & Chen, B. (2025). Analysis of CeO2-Supported Ru Catalysts for an Efficient Catalytic Wet Air Oxidation of Reconstituted Tobacco Wastewater. Catalysts, 15(2), 109. https://doi.org/10.3390/catal15020109

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