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Einaga H, Zheng X. Fundamental insights and recent advances in catalytic oxidation processes using ozone for the control of volatile organic compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:43540-43560. [PMID: 38909152 DOI: 10.1007/s11356-024-34004-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 06/11/2024] [Indexed: 06/24/2024]
Abstract
The development of technologies for highly efficient treatment of emissions containing low concentrations of volatile organic compounds (VOCs) remains an important challenge. Catalytic oxidation with ozone (catalytic ozonation) is useful for the oxidative decomposition of VOCs, particularly aromatic compounds, under ambient temperature conditions. Only inexpensive transition metal oxides are required as catalysts, and Mn-based catalysts are widely used for catalytic ozonation. This review describes the oxidation reaction mechanisms, reaction pathways of aromatic hydrocarbons, and dependence of the catalytic ozonation activity on the reaction conditions. The reasons why Mn oxides are effective in catalytic ozonation are also explained. The structure of the catalytic active sites and the types of supporting materials contributing to the reaction are also discussed in detail, with the aim of establishing a VOC control technology. In addition, recent progress in catalytic oxidation processes using ozone as an oxidant has been outlined, focusing on catalyst materials and reaction conditions.
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Affiliation(s)
- Hisahiro Einaga
- Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan.
- Department of Interdisciplinary Engineering Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan.
| | - Xuerui Zheng
- Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
- Department of Interdisciplinary Engineering Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
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Wan X, Shi K, Li H, Shen F, Gao S, Duan X, Zhang S, Zhao C, Yu M, Hao R, Li W, Wang G, Peressi M, Feng Y, Wang W. Catalytic Ozonation of Polluter Benzene from -20 to >50 °C with High Conversion Efficiency and Selectivity on Mullite YMn 2O 5. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023. [PMID: 37225661 DOI: 10.1021/acs.est.3c01557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Catalytic decomposition of aromatic polluters at room temperature represents a green route for air purification but is currently challenged by the difficulty of generating reactive oxygen species (ROS) on catalysts. Herein, we develop a mullite catalyst YMn2O5 (YMO) with dual active sites of Mn3+ and Mn4+ and use ozone to produce a highly reactive O* upon YMO. Such a strong oxidant species on YMO shows complete removal of benzene from -20 to >50 °C with a high COx selectivity (>90%) through the generated reactive species O* on the catalyst surface (60 000 mL g-1 h-1). Although the accumulation of water and intermediates gradually lowers the reaction rate after 8 h at 25 °C, a simple treatment by ozone purging or drying in the ambient environment regenerates the catalyst. Importantly, when the temperature increases to 50 °C, the catalytic performance remains 100% conversion without any degradation for 30 h. Experiments and theoretical calculations show that such a superior performance stems from the unique coordination environment, which ensures high generation of ROS and adsorption of aromatics. Mullite's catalytic ozonation degradation of total volatile organic compounds (TVOC) is applied in a home-developed air cleaner, resulting in high efficiency of benzene removal. This work provides insights into the design of catalysts to decompose highly stable organic polluters.
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Affiliation(s)
- Xiang Wan
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Kai Shi
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Huan Li
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Fangxie Shen
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Shan Gao
- Physics Department, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Xiangmei Duan
- Physics Department, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Shen Zhang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Chunning Zhao
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Meng Yu
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Ruiting Hao
- School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, Yunnan Province, China
| | - Weifang Li
- State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin 300191, China
| | - Gen Wang
- State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin 300191, China
| | - Maria Peressi
- Department of Physics, University of Trieste, Trieste 34151, Italy
| | - Yinchang Feng
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Weichao Wang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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Hong W, Liu Y, Zhu T, Wang H, Sun Y, Shen F, Li X. Promoting the Catalytic Ozonation of Toluene by Introducing SO 42- into the α-MnO 2/ZSM-5 Catalyst to Tune Both Oxygen Vacancies and Acid Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:15695-15704. [PMID: 36259958 DOI: 10.1021/acs.est.2c05174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Mn-based catalysts hold the promise of practical applications in catalytic ozonation of toluene at room temperature, yet improvement of toluene conversion and COx selectivity remains challenging. Here, an innovative α-MnO2/ZSM-5 catalyst modified with SO42- was successfully prepared, and both characterizations and density functional theory (DFT) calculations showed that SO42- introduction facilitated the formation of oxygen vacancies, Lewis and Brönsted acid sites, and active oxygen species and enhanced the adsorption ability of toluene on α-MnO2/ZSM-5. Characterizations also showed that SO42- introduction made the catalyst possess larger specific surface area, superior reducibility, and stronger surface acidity. As a result, α-MnO2/ZSM-5 with a S/Mn molar ratio of 0.019 exhibited the best toluene conversion and COx selectivity, 87 and 94%, respectively, after the reaction for 8 h at 30 °C under an initial concentration of 5 ppm toluene and 45 ppm ozone, relative humidity of 45%, and space velocity of 32,000 h-1, far superior to those of non-noble catalysts reported to date under comparable reaction conditions. The synergistic role of increased oxygen vacancies and acid sites of α-MnO2/ZSM-5 modified with SO42- resulted in excellent toluene conversion and COx selectivity. The findings represented a critical step toward the rational design and synthesis of highly efficient catalysts for catalytic ozonation of toluene.
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Affiliation(s)
- Wei Hong
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Yan Liu
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Tianle Zhu
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Haining Wang
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Ye Sun
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Fangxia Shen
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
| | - Xiang Li
- School of Space and Environment, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, Beihang University, Beijing100191, China
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Zhao R, Wang H, Zhao D, Liu R, Liu S, Fu J, Zhang Y, Ding H. Review on Catalytic Oxidation of VOCs at Ambient Temperature. Int J Mol Sci 2022; 23:ijms232213739. [PMID: 36430218 PMCID: PMC9697337 DOI: 10.3390/ijms232213739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/02/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022] Open
Abstract
As an important air pollutant, volatile organic compounds (VOCs) pose a serious threat to the ecological environment and human health. To achieve energy saving, carbon reduction, and safe and efficient degradation of VOCs, ambient temperature catalytic oxidation has become a hot topic for researchers. Firstly, this review systematically summarizes recent progress on the catalytic oxidation of VOCs with different types. Secondly, based on nanoparticle catalysts, cluster catalysts, and single-atom catalysts, we discuss the influence of structural regulation, such as adjustment of size and configuration, metal doping, defect engineering, and acid/base modification, on the structure-activity relationship in the process of catalytic oxidation at ambient temperature. Then, the effects of process conditions, such as initial concentration, space velocity, oxidation atmosphere, and humidity adjustment on catalytic activity, are summarized. It is further found that nanoparticle catalysts are most commonly used in ambient temperature catalytic oxidation. Additionally, ambient temperature catalytic oxidation is mainly applied in the removal of easily degradable pollutants, and focuses on ambient temperature catalytic ozonation. The activity, selectivity, and stability of catalysts need to be improved. Finally, according to the existing problems and limitations in the application of ambient temperature catalytic oxidation technology, new prospects and challenges are proposed.
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Affiliation(s)
- Rui Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Han Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Dan Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Rui Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Shejiang Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Jianfeng Fu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yuxin Zhang
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Hui Ding
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
- Correspondence:
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Liu B, Ji J, Zhang B, Huang W, Gan Y, Leung DYC, Huang H. Catalytic ozonation of VOCs at low temperature: A comprehensive review. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126847. [PMID: 34416698 DOI: 10.1016/j.jhazmat.2021.126847] [Citation(s) in RCA: 67] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/31/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
VOCs abatement has attracted increasing interest because of the detrimental effects on both atmospheric environment and human beings of VOCs. The assistance of ozone has enabled efficient VOCs removal at low temperature. Thereby, catalytic ozonation is considered as one of the most feasible and effective methods for VOCs elimination. This work systematically reviews the emerging advances of catalytic ozonation of different VOCs (i.e., aromatic hydrocarbons, oxygenated VOCs, chlorinated VOCs, sulfur-containing VOCs, and saturated alkanes) over various functional catalysts. General reaction mechanism of catalytic ozonation including both Langmuir-Hinshelwood and Mars-van-Krevelen mechanisms was proposed depending on the reactive oxygen species involving the reactions. The influence of reaction conditions (water vapor and temperature) is fully discussed. This review also introduces the enhanced VOCs oxidation via catalytic ozonation in the ozone-generating systems including plasma and vacuum ultraviolet. Lastly, the existing challenges of VOCs catalytic ozonation are presented, and the perspective of this technology is envisioned.
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Affiliation(s)
- Biyuan Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Jian Ji
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Boge Zhang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenjun Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yanling Gan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Dennis Y C Leung
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
| | - Haibao Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Indoor Air Pollution Control Engineering Research Center, Guangzhou 510006, China.
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Zhang L, Dai L, Li X, Yu W, Li S, Guan J. 3D structured TiO 2-based aerogel photocatalyst for the high-efficiency degradation of toluene gas. NEW J CHEM 2022. [DOI: 10.1039/d1nj05395g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 3D TiO2-based aerogel is prepared that improves the mass-transfer efficiency of the gas–solid reaction for the high-efficiency degradation of toluene gas.
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Affiliation(s)
- Li Zhang
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
| | - Li Dai
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
| | - Xueying Li
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
| | - Wei Yu
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
| | - Shijie Li
- Innovation & Application Institute, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China
| | - Jie Guan
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
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Xu Z, Mo S, Li Y, Zhang Y, Wu J, Fu M, Niu X, Hu Y, Ye D. Pt/MnO x for toluene mineralization via ozonation catalysis at low temperature: SMSI optimization of surface oxygen species. CHEMOSPHERE 2022; 286:131754. [PMID: 34399263 DOI: 10.1016/j.chemosphere.2021.131754] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/23/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
The problem of deep oxidation of low concentrations of VOCs in industrial tail gas is exceptionally urgent. The preparation of VOCs ozonation catalyst with a high mineralization rate is still a challenge. In this paper, manganese oxide carriers with different morphologies were synthesized by simple methods and used to catalyze ozone mineralization of toluene after loading Pt nanoparticles efficiently. The conversion of toluene over Pt/MnOx-T catalyst was more than 98 % at ambient temperature, and the mineralization rate of toluene was close to 100 % at 70 °C. Through a variety of characterization methods, the strong metal-support interaction (SMSI) between Pt nanoparticles and carriers was successfully constructed. It was found that SMSI successfully optimized the surface oxygen species and oxygen migration ability of the catalyst, and then realized the high degree of mineralization of toluene at low temperature. This paper guides the subsequent development of Pt-Mn catalysts for catalytic organic pollutants ozonation with high activity.
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Affiliation(s)
- Ziyang Xu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Shengpeng Mo
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Yanxia Li
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Yuchen Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Junliang Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou, 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou, 510006, China.
| | - Xiaojun Niu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou, 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou, 510006, China
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Xu S, Yang J, Hussein R, Liu G, Su B. Heterogeneous ozonation of ofloxacin using MnO x -CeO x /γ-Al 2 O 3 as a catalyst: Performances, degradation kinetics and possible degradation pathways. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:1361-1369. [PMID: 33524187 DOI: 10.1002/wer.1524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 01/05/2021] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
In this study, the performance of ofloxacin (OFX) degradation in synthetic wastewater using synthesized MnOx -CeOx /γ-Al2 O3 as a heterogeneous ozonation catalyst was evaluated. The removal rates of OFX and chemical oxygen demand (COD) during 15-day continuous-flow experiments were 98.2% and 76.7% on average, respectively. An ozone index (mgCOD/mgO3 ) of 1.09 with a high ozone utilization efficiency of 91.39% was achieved. The pseudo-first-order rate constant of ofloxacin degradation reached 15.216 × 10-2 min-1 , which was five times that (3.085 × 10-2 min-1 ) without catalysts. The results of gas chromatography-mass spectrometry (GC-MS) demonstrated that a variety of small-molecule organics occurred in the final oxidation products, such as 4-hydroxyl-4-methyl-2-pentanone and 2-oxoadipic acid in addition to homologs of OFX. The results of this study suggested that hydroxyl radicals played critical roles in the degradation and mineralization of OFX via four main pathways: (a) electrophilic addition of nitrogen; (b) breakdown of carbon-carbon double bonds; (c) hydrolysis of ether rings; and (d) halodecarboxylation of carboxyl groups. The biodegradability (BOD5 /COD) of OFX after catalytic ozonation reached 0.54. PRACTITIONER POINTS: Ofloxacin wastewater was treated using catalytic ozonation in a 15-day continuous experiment with MnOx -CeOx /γ-Al2 O3 as a catalyst. The ozone index reached 1.09 mgCOD/mgO3 during ozonation of ofloxacin. The presence of the catalyst increased the reaction rate constant by a factor of five. 4-hydroxy-4-methyl-2-pentanone was the primary ofloxacin oxidation product.
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Affiliation(s)
- Shengkai Xu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Jiaxin Yang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Rafaat Hussein
- College of Environment Science and Forest, State University of New York, Syracuse, NY, USA
| | - Guangqing Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Bensheng Su
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
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