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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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2
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Kandukuri B, Das S, Mudadla UR, Madras G, Thatikonda S, Challapalli S. Non-thermal plasma mitigation of low concentration of air pollutants: removal of isopropyl alcohol using transition metal-oxide integration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-32569-7. [PMID: 38416355 DOI: 10.1007/s11356-024-32569-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 02/16/2024] [Indexed: 02/29/2024]
Abstract
The present work studied the decomposition of isopropyl alcohol (IPA), widely used in chemical industries and households, in a packed-bed dielectric barrier discharge (DBD) plasma reactor. Metal oxide (MOx) coated on γ-Al2O3 (M = Cu, Mn, Co) was utilized for packing. The plasma-packed mode was a likely alternative to the conventional removal techniques, as it aids the conversion of dilute concentrations of IPA to CO and CO2 at ambient conditions (room temperature and atmospheric pressure). The mean electron energy calculations suggest that electrons with higher energy are generated when the discharge zone is packed with catalysts. When comparing IPA conversion (input concentration of 25 ppm) for no packing mode and MOx/γ-Al2O3 coupled plasma mode, the latter method enhances conversion to greater than 90% at an applied voltage of 18 kV. Also, MOx/γ-Al2O3 showed the highest selectivity to CO2 (70%) compared to plasma-only mode (45%). The metal-oxide layer provides the necessary catalytic surface facilitating the oxidation of IPA to COx through active oxygen species or the interaction of surface hydroxyl groups. The use of MOx/γ-Al2O3 resulted in about 90% carbon balance and reduced ozone generation, demonstrating the significance of integrating metal oxide to achieve efficient conversion and maximal selectivity towards the desired products.
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Affiliation(s)
- Bhargavi Kandukuri
- Department of Chemistry, Indian Institute of Technology Hyderabad, Telangana, 502 285, India
| | - Supriya Das
- Department of Chemistry, Indian Institute of Technology Hyderabad, Telangana, 502 285, India
| | | | - Giridhar Madras
- Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Telangana, 502 285, India
| | - Shashidhar Thatikonda
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Telangana, 502 285, India
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Cha JS, Kim YM, Lee IH, Choi YJ, Rhee GH, Song H, Jeon BH, Lam SS, Khan MA, Andrew Lin KY, Chen WH, Park YK. Mitigation of hazardous toluene via ozone-catalyzed oxidation using MnOx/Sawdust biochar catalyst. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 312:119920. [PMID: 35977635 DOI: 10.1016/j.envpol.2022.119920] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 07/16/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
This study investigated catalytic ozone oxidation using a sawdust char (SDW) catalyst to remove hazardous toluene emitted from the chemical industry. The catalyst properties were analyzed by proximate, ultimate, nitrogen adsorption-desorption isotherms, Fourier-transform infrared, and X-ray photoelectron spectroscopy analyses. In addition, hydrogen-temperature programmed reduction experiments were conducted to analyze the catalyst properties. The specific area and formation of micropores of SDC were improved by applying KOH treatment. MnOx/SDC-K3 exhibited a higher toluene removal efficiency of 89.7% after 100 min than MnOx supported on activated carbon (MnOx/AC) with a removal efficiency of 6.6%. The higher (Oads (adsorbed oxygen)+Ov(vacancy oxygen))/OL (lattice oxygen) and Mn3+/Mn4+ ratios of MnOx/SDC-K3 than those of MnOx/AC seemed to be important for the catalytic oxidation of toluene.
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Affiliation(s)
- Jin Sun Cha
- Material Technology Center, Korea Testing Laboratory, Seoul, 08389, Republic of Korea
| | - Young-Min Kim
- Department of Environmental Engineering, Daegu University, Gyeongsan, 38453, Republic of Korea
| | - Im Hack Lee
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Yong Jun Choi
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Gwang Hoon Rhee
- Department of Mechanical and Information Engineering, University of Seoul, 02504, Seoul, Republic of Korea
| | - Hocheol Song
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Moonis Ali Khan
- Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Kun-Yi Andrew Lin
- Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan
| | - Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung Univ., Tainan, 701, Taiwan; Research Center for Smart Sustain. Circular Economy, Tunghai Univ., Taichung, 407, Taiwan; Department of Mechanical. Engineering, National Chin-Yi Univ. of Technol., Taichung, 411, Taiwan
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea.
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Recent Advances of Beta Zeolite in the Volatile Organic Compounds(VOCs) Elimination by the Catalytic Oxidations. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2038-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zhang J, Xu X, Zhao S, Meng X, Xiao FS. Recent advances of zeolites in catalytic oxidations of volatile organic compounds. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Low Temperature Catalytic Oxidation of Ethanol Using Ozone over Manganese Oxide-Based Catalysts in Powdered and Monolithic Forms. Catalysts 2022. [DOI: 10.3390/catal12020172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Catalytic oxidation of low concentrations of ethanol was investigated in dry and humid air streams at low temperature (60 °C) over manganese oxide-based catalysts supported on a meso–macrostructured TiO2 using ozone as the oxidant. Ethanol was selected as a representative model VOC present in indoor air, and its concentration was fixed to 10 ppm. For that purpose, a series of Mn/TiO2 powder and monolithic catalysts was prepared, some doped with 0.5 wt% Pd. Whatever the catalyst, the presence of water vapor in the gas phase had a beneficial effect on the conversion of ethanol and ozone. The Pd–Mn/TiO2 catalyst containing 0.5 wt% Pd and 5 wt% Mn exhibited superior oxidation efficiency to the Mn/TiO2 counterparts by increasing ozone decomposition (77%) while simultaneously increasing the selectivity to CO2 (85%). The selectivity to CO2 approached nearly 100% by increasing the amount of catalyst from 20 to 80 mg. In a further step, alumina wash-coated cordierite honeycomb monoliths were coated with the 0.5Pd–5Mn/TiO2 catalyst. Full conversion of ethanol to CO2 without residual O3 emitted (less than 10 ppb) could be attained, thereby demonstrating that the proposed Pd–Mn/TiO2 monolithic catalyst fulfills the specifications required for onboard systems.
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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: 71] [Impact Index Per Article: 35.5] [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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8
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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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Ghavami M, Soltan J, Chen N. Enhancing Catalytic Ozonation of Acetone and Toluene in Air Using MnOx/Al2O3 Catalysts at Room Temperature. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mehraneh Ghavami
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
| | - Jafar Soltan
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
| | - Ning Chen
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
- Canadian Light Source Inc., University of Saskatchewan, 101 Perimeter Road, Saskatoon, SK S7N 0X4, Canada
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Wei L, Chen H, Wei Y, Jia J, Zhang R. Ce-promoted Mn/ZSM-5 catalysts for highly efficient decomposition of ozone. J Environ Sci (China) 2021; 103:219-228. [PMID: 33743904 DOI: 10.1016/j.jes.2020.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 06/12/2023]
Abstract
Manganese oxides supported by ZSM-5 zeolite (Mn/ZSM-5) as well as their further modified by Ce promoter were achieved by simple impregnation method for ozone catalytic decomposition. The yCe20Mn/ZSM-5-81 catalyst with 8% Ce loading showed the highest catalytic activity at relative humidity of 50% and a space velocity of 360 L/(g × hr), giving 93% conversion of 600 ppm O3 after 5 hr. Moreover, this sample still maintained highly activity and stability in humid air with 50%-70% relative humidity. Series of physicochemical characterization including X-ray diffraction, temperature-programmed technology (NH3-TPD and H2-TPR), X-ray photoelectron spectroscopy and oxygen isotopic exchange were introduced to disclose the structure-performance relationship. The results indicated that moderate Si/Al ratio (81) of zeolite support was beneficial for ozone decomposition owing to the synergies of acidity and hydrophobicity. Furthermore, compared with 20Mn/ZSM-5-81, Ce doping could enhance the amount of low valance manganese (such as Mn2+ and Mn3+). Besides, the Ce3+/Ce4+ ratio of 8Ce20Mn/ZSM-5-81 sample was higher than that of 4Ce20Mn/ZSM-5-81. Additionally, the synergy between the MnOx and CeO2 could easily transfer electron via the redox cycle, thus resulting in an increased reducibility at low temperatures and high concentration of surface oxygen. This study provides important insights to the utilization of porous zeolite with high surface area to disperse active component of manganese for ozone decomposition.
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Affiliation(s)
- Linlin Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Hongxia Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Ying Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jingbo Jia
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Runduo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, PR China.
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Shao Q, Dong H, Zhang J, Xu B, Wu Y, Long C. Manganese supported on controlled dealumination Y-zeolite for ozone catalytic oxidation of low concentration toluene at low temperature. CHEMOSPHERE 2021; 271:129604. [PMID: 33460898 DOI: 10.1016/j.chemosphere.2021.129604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/01/2021] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Low-temperature catalytic degradation of VOCs with ozone has received widespread attention recently. In this work, a combination method of steam and nitric acid was used to control the dealuminization of Y zeolite, and then manganese oxide was loaded on the Y zeolite by impregnation method. It was found that MnOx was highly dispersed in the dealumination zeolite, and the adsorbed oxygens were more easily activated in the active oxygen vacancies. The MnOx supported on dealumination Y zeolite showed better catalytic effect than that supported on the parent Y. At low humidity (0.8%) in 30 °C, the degradation efficiency of toluene reached above 94% by using the catalyst with mild dealumination. When more water vapor was introduced, the degradation of toluene was inhibited. However, the catalytic performance of the catalyst with deep dealumination was not affected. With the help of in-situ DRIFTS, it was observed that the intermediates and reaction by-products had changed under different humidity conditions.
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Affiliation(s)
- Qi Shao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Hao Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Jian Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Bowen Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Yuhao Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Chao Long
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China; Quanzhou Institute for Environmental Protection Industry, Nanjing University, Beifeng Road, Quanzhou, 362000, China.
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Chen H, Fang C, Gao X, Jiang G, Wang X, Sun SP, Duo Wu W, Wu Z. Sintering- and oxidation-resistant ultrasmall Cu(I)/(II) oxides supported on defect-rich mesoporous alumina microspheres boosting catalytic ozonation. J Colloid Interface Sci 2021; 581:964-978. [PMID: 32956914 DOI: 10.1016/j.jcis.2020.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 11/28/2022]
Abstract
Supported copper oxides with well-dispersed metal species, small size, tunable valence and high stability are highly desirable in catalysis. Herein, novel copper oxide (CuOx) catalysts supported on defect-rich mesoporous alumina microspheres are developed using a spray-drying-assisted evaporation induced self-assembly method. The catalysts possess a special structure composed of a mesoporous outer layer, a mesoporous-nanosphere-stacked under layer and a hollow cavity. Because of this special structure and the defective nature of the alumina support, the CuOx catalysts are ultrasmall in size (1 ~ 3 nm), bivalent with a very high Cu+/Cu2+ ratio (0.7), and highly stable against sintering and oxidation at high temperatures (up to 800 °C), while the wet impregnation method results in CuOx catalysts with much larger sizes (~15 nm) and lower the Cu+/Cu2+ ratios (~0.29). The catalyst formation mechanism through the spray drying method is proposed and discussed. The catalysts show remarkable performance in catalytic ozonation of phenol wastewaters. With high-concentration phenol (250 ppm) as the model organic pollutant, the optimized catalyst delivers promising catalytic performance with 100% phenol removal and 53% TOC removal in 60 min, and a high cyclic stability. Superoxide anion free radicals (⋅O2-), singlet oxygen (1O2) and hydroxyl radicals (⋅OH) are the predominant reactive species. A detailed structure-performance study reveals the surface hydroxyl groups and Cu+/Cu2+ redox couples play cooperatively to accelerate O3 decomposition generating reactive radicals. The plausible catalytic O3 decomposition mechanism is proposed and discussed with supportive evidences.
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Affiliation(s)
- Hua Chen
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China
| | - Cunxia Fang
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China
| | - Xingmin Gao
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China
| | - Guanyun Jiang
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China
| | - Xiaoning Wang
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China
| | - Sheng-Peng Sun
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China
| | - Winston Duo Wu
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China.
| | - Zhangxiong Wu
- Engineering Research Centre of Advanced Powder Technology (ERCAPT), School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu Province 215123, PR China.
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He C, Wang Y, Li Z, Huang Y, Liao Y, Xia D, Lee S. Facet Engineered α-MnO 2 for Efficient Catalytic Ozonation of Odor CH 3SH: Oxygen Vacancy-Induced Active Centers and Catalytic Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:12771-12783. [PMID: 32877602 DOI: 10.1021/acs.est.0c05235] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The oxygen vacancy in MnO2 is normally proved as the reactive site for the catalytic ozonation, and acquiring a highly reactive crystal facet with abundant oxygen vacancy by facet engineering is advisable for boosting the catalytic activity. In this study, three facet-engineered α-MnO2 was prepared and successfully utilized for catalytic ozonation toward an odorous CH3SH. The as-synthesized 310-MnO2 exhibited superior activity in catalytic ozonation of CH3SH than that of 110-MnO2 and 100-MnO2, which could achieve 100% removal efficiency for 70 ppm of CH3SH within 20 min. The results of XPS, Raman, H2-TPR, and DFT calculation all prove that the (310) facets possess a higher surface energy than other facets can feature the construction of oxygen vacancies, thus facilitating the adsorption and activate O3 into intermediate peroxide species (O2-/O22-) and reactive oxygen species (•O2-/1O2) for eliminating adjacent CH3SH. In situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) revealed that the CH3SH molecular was chemisorbed on S atom to form CH3S-, which was further converted into intermediate CH3SO3- and finally oxidized into SO42- and CO32-/CO2 during the process. Attributed to the deep oxidation of CH3SH on 310-MnO2 via efficient cycling of active oxygen vacancies, the lifetime of 310-MnO2 can be extended to 2.5 h with limited loss of activity, while 110-MnO2 and 100-MnO2 were inactivated within 1 h. This study deepens the comprehension of facet-engineering in MnO2 and presents an efficient and portable catalyst to control odorous pollution.
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Affiliation(s)
- Chun He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
| | - Yunchen Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhiyao Li
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Yajing Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Yuhong Liao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Dehua Xia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
| | - Shuncheng Lee
- Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong, China
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Lee JE, Ok YS, Tsang DCW, Song J, Jung SC, Park YK. Recent advances in volatile organic compounds abatement by catalysis and catalytic hybrid processes: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 719:137405. [PMID: 32114230 DOI: 10.1016/j.scitotenv.2020.137405] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 02/04/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
Air pollution, particularly for toxic and harmful compounds to humans and the environment, has aroused increasing public concerns. Among air pollutants, volatile organic compounds (VOCs) are the main sources of air pollution. Many attempts have been made to control VOCs using catalysts, plasma, photolysis, and adsorption. Among them, oxidative catalysis by noble metals or transition metal oxides is considered one of the most feasible and effective methods to control VOCs. This paper reviews the experimental achievements on the abatement of VOCs using noble metals, transition metals and modified metal oxide catalysts. Although the catalytic degradation of VOCs appears to be feasible, there are unavoidable problems when only catalysis treatments are applied to the field. Therefore, catalysts including hybrid processes are developed to improve the removal efficiency of VOCs. This review addresses new hybrid treatments to remove VOCs using catalysts, including hybrid treatment combined with plasma, photolysis, and adsorption. The mechanism of the oxidation of VOCs by catalysts is explained by adsorption-desorption principles, such as the Langmuir-Hinshelwood, Eley-Rideal, and Mars-van-Krevelen mechanisms. A π-backbonding interaction between unsaturated compounds and transition metals is introduced to better understand the mechanism of VOC removals. Finally, several factors affecting the catalytic activities, such as support, component ratio, preparation method, metal loading, and deactivation factor, are discussed.
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Affiliation(s)
- Jung Eun Lee
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea
| | - Yong Sik Ok
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - JiHyeon Song
- Department of Civil and Environmental Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Sang-Chul Jung
- Department of Environmental Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea.
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Hu J, Li Y, Nan S, Yoza BA, Li Y, Zhan Y, Wang Q, Li QX, Guo S, Chen C. Catalytic Ozonation of Nitrobenzene by Manganese-Based Y Zeolites. Front Chem 2020; 8:80. [PMID: 32117897 PMCID: PMC7028746 DOI: 10.3389/fchem.2020.00080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 01/24/2020] [Indexed: 11/21/2022] Open
Abstract
Catalytic ozonation process (COP) is considered as a cost-efficient technology for the treatment of refractory chemical wastewaters. The catalyst performance plays an important role for the treatment efficiency. The present study investigated efficiencies and mechanisms of manganese (Mn)-based Y zeolites in COPs for removing nitrobenzene from water. The catalysts of Mn/NaY and Mn/USY were prepared by incipient wetness impregnation, while Mn-USY was obtained by hydrothermal synthesis. Mn-USY contained a greater ratio of Mn2+ than Mn/NaY, and Mn/USY. Mn oxides loaded on Y zeolites promoted the COP efficiencies. Mn/NaY increased total organic carbon removal in COP by 7.3% compared to NaY, while Mn/USY and Mn-USY increased 11.5 and 15.8%, respectively, relative to USY in COP. Multivalent Mn oxides (Mn2+, Mn3+, and Mn4+) were highly dispersed on the surface of NaY or USY, and function as catalytic active sites, increasing mineralization. Mn-USY showed the highest total organic carbon removal (44.3%) in COP among the three catalysts, because Mn-USY had a higher ratio of Mn2+ to the total Mn oxides on the surface than Mn/NaY and Mn/USY and the catalytic effects from intercorrelations between Mn oxides and mesoporous surface structures. The hydroxyl radicals and superoxide radicals governed oxidations in COP using Mn-USY. Nitrobenzene was oxidized to polyhydroxy phenol, polyhydroxy nitrophenol, and p-benzoquinone. The intermediates were then oxidized to small organic acids and ultimately carbon dioxide and water. This study demonstrates the potential of Y zeolites used in COP for the treatment of refractory chemical wastewaters.
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Affiliation(s)
- Jingze Hu
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Yiming Li
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Shaoshuai Nan
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Brandon A Yoza
- Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Yifan Li
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Yali Zhan
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Qinghong Wang
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Shaohui Guo
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
| | - Chunmao Chen
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, China
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He C, Cheng J, Zhang X, Douthwaite M, Pattisson S, Hao Z. Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources. Chem Rev 2019; 119:4471-4568. [DOI: 10.1021/acs.chemrev.8b00408] [Citation(s) in RCA: 769] [Impact Index Per Article: 153.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chi He
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, P.R. China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Jie Cheng
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Xin Zhang
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Mark Douthwaite
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Samuel Pattisson
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Zhengping Hao
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
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17
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Preparation of Ce⁻Mn Composite Oxides with Enhanced Catalytic Activity for Removal of Benzene through Oxalate Method. NANOMATERIALS 2019; 9:nano9020197. [PMID: 30717455 PMCID: PMC6409587 DOI: 10.3390/nano9020197] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 01/30/2019] [Accepted: 01/30/2019] [Indexed: 11/24/2022]
Abstract
The catalytic activities of CeO2-MnOx composite oxides synthesized through oxalate method were researched. The results exhibited that the catalytic properties of CeO2-MnOx composite oxides were higher than pure CeO2 or MnOx. When the Ceat/Mnat ratio was 3:7, the catalytic activity reached the best. In addition, the activities of CeO2-MnOx synthesized through different routes over benzene oxidation were also comparative researched. The result indicated that the catalytic property of sample prepared by oxalate method was better than others, which maybe closely related with their meso-structures. Meanwhile, the effects of synergistic interaction and oxygen species in the samples on the catalytic ability can’t be ignored.
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Xiao H, Wu J, Wang X, Wang J, Mo S, Fu M, Chen L, Ye D. Ozone-enhanced deep catalytic oxidation of toluene over a platinum-ceria-supported BEA zeolite catalyst. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.09.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Wang H, Guo W, Jiang Z, Yang R, Jiang Z, Pan Y, Shangguan W. New insight into the enhanced activity of ordered mesoporous nickel oxide in formaldehyde catalytic oxidation reactions. J Catal 2018. [DOI: 10.1016/j.jcat.2018.02.023] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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20
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Omoike AI, Hall KN. Oxidative Degradation of Bisphenol A Using Recyclable Nanomaterials. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-017-0627-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Zaitan H, Manero MH, Valdés H. Application of high silica zeolite ZSM-5 in a hybrid treatment process based on sequential adsorption and ozonation for VOCs elimination. J Environ Sci (China) 2016; 41:59-68. [PMID: 26969051 DOI: 10.1016/j.jes.2015.05.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 04/14/2015] [Accepted: 05/05/2015] [Indexed: 06/05/2023]
Abstract
In this study, a hydrophobic synthetic zeolite, namely ZSM-5 is chosen as an adsorbent/catalyst for toluene removal. Experimental results showed that toluene adsorption onto ZSM-5 was favourable, following a Langmuir adsorption isotherm model. ZSM-5 zeolite was regenerated using gaseous ozone at low temperature. Adsorbed toluene was oxidised, releasing mainly CO2 and H2O. Traces of oxidation by-products such as acetic acid and acetaldehyde were formed and remained adsorbed after the oxidativate regeneration with ozone. After four successive cycles of adsorption/ozonation, the adsorption efficiency was not affected (92%-99%). These results showed that volatile organic compound (VOC) removal by adsorption onto ZSM-5 zeolite followed by ozone regeneration could be used as a promising hybrid process for the control of VOC emissions in terms of efficiency.
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Affiliation(s)
- Hicham Zaitan
- Laboratoire de Chimie de la Matière Condensée (LCMC), Faculté des Sciences et Techniques, Université Sidi Mohamed Ben Abdellah, B.P. 2202, Fès , Maroc.
| | - Marie Hélène Manero
- Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique, 4, Allée Emile Monso, F-31030 Toulouse, France; CNRS, Laboratoire de Génie Chimique, F-31030 Toulouse, France
| | - Héctor Valdés
- Laboratorio de Tecnologías Limpias (F. Ingeniería), Universidad Católica de la Santísima Concepción, Alonso de Ribera 2850, Concepción, Chile
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22
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Huang H, Huang W, Xu Y, Ye X, Wu M, Shao Q, Ou G, Peng Z, Shi J, Chen J, Feng Q, Zan Y, Huang H, Hu P. Catalytic oxidation of gaseous benzene with ozone over zeolite-supported metal oxide nanoparticles at room temperature. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.01.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Jiang L, Zhu R, Mao Y, Chen J, Zhang L. Conversion characteristics and production evaluation of styrene/o-xylene mixtures removed by DBD pretreatment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:1334-50. [PMID: 25629961 PMCID: PMC4344669 DOI: 10.3390/ijerph120201334] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 11/26/2014] [Accepted: 12/30/2014] [Indexed: 11/16/2022]
Abstract
The combination of chemical oxidation methods with biotechnology to removal recalcitrant VOCs is a promising technology. In this paper, the aim was to identify the role of key process parameters and biodegradability of the degradation products using a dielectric barrier discharge (DBD) reactor, which provided the fundamental data to evaluate the possibilities of the combined system. Effects of various technologic parameters like initial concentration of mixtures, residence time and relative humidity on the decomposition and the degradation products were examined and discussed. It was found that the removal efficiency of mixed VOCs decreased with increasing initial concentration. The removal efficiency reached the maximum value as relative humidity was approximately 40%-60%. Increasing the residence time resulted in increasing the removal efficiency and the order of destruction efficiency of VOCs followed the order styrene > o-xylene. Compared with the single compounds, the removal efficiency of styrene and o-xylene in the mixtures of VOCs decreased significantly and o-xylene decreased more rapidly. The degradation products were analyzed by gas chromatography and gas chromatography-mass spectrometry, and the main compounds detected were O3, COx and benzene ring derivatives. The biodegradability of mixed VOCs was improved and the products had positive effect on biomass during plasma application, and furthermore typical results indicated that the biodegradability and biotoxicity of gaseous pollutant were quite depending on the specific input energy (SIE).
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Affiliation(s)
- Liying Jiang
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Runye Zhu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Yubo Mao
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Jianmeng Chen
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Liang Zhang
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
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24
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Einaga H, Maeda N, Nagai Y. Comparison of catalytic properties of supported metal oxides for benzene oxidation using ozone. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00315f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxidation behavior of intermediate compounds is the key factor for controlling the catalytic activities.
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Affiliation(s)
- Hisahiro Einaga
- Department of Energy and Material Sciences
- Faculty of Engineering Sciences
- Kyushu University
- Kasuga
- Japan
| | - Nanako Maeda
- Department of Energy and Material Sciences
- Faculty of Engineering Sciences
- Kyushu University
- Kasuga
- Japan
| | - Yusuke Nagai
- Department of Energy and Material Sciences
- Faculty of Engineering Sciences
- Kyushu University
- Kasuga
- Japan
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25
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Liu Y, Li X, Liu J, Shi C, Zhu A. Ozone catalytic oxidation of benzene over AgMn/HZSM-5 catalysts at room temperature: Effects of Mn loading and water content. CHINESE JOURNAL OF CATALYSIS 2014. [DOI: 10.1016/s1872-2067(14)60070-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Alejandro S, Valdés H, Manéro MH, Zaror CA. Oxidative regeneration of toluene-saturated natural zeolite by gaseous ozone: the influence of zeolite chemical surface characteristics. JOURNAL OF HAZARDOUS MATERIALS 2014; 274:212-220. [PMID: 24794812 DOI: 10.1016/j.jhazmat.2014.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 04/01/2014] [Accepted: 04/02/2014] [Indexed: 06/03/2023]
Abstract
In this study, the effect of zeolite chemical surface characteristics on the oxidative regeneration of toluene saturated-zeolite samples is investigated. A Chilean natural zeolite (53% clinoptilolite, 40% mordenite and 7% quartz) was chemically modified by acid treatment with hydrochloric acid and by ion-exchange with ammonium sulphate. Thermal pre-treatments at 623 and 823K were applied and six zeolite samples with different chemical surface characteristics were generated. Chemical modification of natural zeolite followed by thermal out-gassing allows distinguishing the role of acidic surface sites on the regeneration of exhausted zeolites. An increase in Brønsted acid sites on zeolite surface is observed as a result of ammonium-exchange treatment followed by thermal treatment at 623K, thus increasing the adsorption capacity toward toluene. High ozone consumption could be associated to a high content of Lewis acid sites, since these could decompose ozone into atomic active oxygen species. Then, surface oxidation reactions could take part among adsorbed toluene at Brønsted acid sites and surface atomic oxygen species, reducing the amount of adsorbed toluene after the regenerative oxidation with ozone. Experimental results show that the presence of adsorbed oxidation by-products has a negative impact on the recovery of zeolite adsorption capacity.
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Affiliation(s)
- Serguei Alejandro
- Laboratorio de Tecnologías Limpias (F. Ingeniería), Universidad Católica de la Santísima Concepción, Alonso de Ribera 2850, Concepción, Chile; Núcleo de Energías Renovables (F. Ingeniería), Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco, Chile
| | - Héctor Valdés
- Laboratorio de Tecnologías Limpias (F. Ingeniería), Universidad Católica de la Santísima Concepción, Alonso de Ribera 2850, Concepción, Chile.
| | - Marie-Hélène Manéro
- Université de Toulouse; INPT, UPS; Laboratoire de Génie Chimique, 4, Allée Emile Monso, F-31030 Toulouse, France; CNRS; Laboratoire de Génie Chimique; F-31030 Toulouse, France
| | - Claudio A Zaror
- Departamento de Ingeniería Química (F. Ingeniería), Universidad de Concepción, Concepción, Correo 3, Casilla 160-C, Chile
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Park SH, Jeon JK, Kim SC, Jung SC, Park YK. Recent Trends on Catalytic Oxidation of Benzene without or with Ozone over Mn-Based Catalysts. APPLIED CHEMISTRY FOR ENGINEERING 2014. [DOI: 10.14478/ace.2014.1050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Liu Y, Li XS, Shi C, Liu JL, Zhu AM, Jang BWL. Ozone catalytic oxidation of adsorbed benzene over AgMn/HZSM-5 catalysts at room temperature. Catal Sci Technol 2014. [DOI: 10.1039/c3cy01102j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Investigation of ozone catalytic oxidation of adsorbed benzene over AgMn/HZSM-5 to provide insight into plasma catalytic oxidation of adsorbed benzene in the cycled storage–discharge process.
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Affiliation(s)
- Yang Liu
- Laboratory of Plasma Physical Chemistry
- School of Physics and Optoelectronic Engineering & School of Chemistry
- Dalian University of Technology
- 116024 Dalian, China
| | - Xiao-Song Li
- Laboratory of Plasma Physical Chemistry
- School of Physics and Optoelectronic Engineering & School of Chemistry
- Dalian University of Technology
- 116024 Dalian, China
| | - Chuan Shi
- Laboratory of Plasma Physical Chemistry
- School of Physics and Optoelectronic Engineering & School of Chemistry
- Dalian University of Technology
- 116024 Dalian, China
| | - Jing-Lin Liu
- Laboratory of Plasma Physical Chemistry
- School of Physics and Optoelectronic Engineering & School of Chemistry
- Dalian University of Technology
- 116024 Dalian, China
| | - Ai-Min Zhu
- Laboratory of Plasma Physical Chemistry
- School of Physics and Optoelectronic Engineering & School of Chemistry
- Dalian University of Technology
- 116024 Dalian, China
| | - Ben W.-L. Jang
- Department of Chemistry
- Texas A&M University-Commerce
- , USA
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29
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Einaga H, Teraoka Y, Ogata A. Catalytic oxidation of benzene by ozone over manganese oxides supported on USY zeolite. J Catal 2013. [DOI: 10.1016/j.jcat.2013.05.016] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Petrova P, Tabakova T, Munteanu G, Zanella R, Tsvetkov M, Ilieva L. Gold catalysts on Co-doped ceria for complete benzene oxidation: Relationship between reducibility and catalytic activity. CATAL COMMUN 2013. [DOI: 10.1016/j.catcom.2013.03.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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31
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Zhang P, Gong Y, Li H, Chen Z, Wang Y. Selective oxidation of benzene to phenol by FeCl3/mpg-C3N4 hybrids. RSC Adv 2013. [DOI: 10.1039/c3ra23357j] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Zhao DZ, Shi C, Li XS, Zhu AM, Jang BWL. Enhanced effect of water vapor on complete oxidation of formaldehyde in air with ozone over MnOx catalysts at room temperature. JOURNAL OF HAZARDOUS MATERIALS 2012; 239-240:362-369. [PMID: 23021101 DOI: 10.1016/j.jhazmat.2012.09.009] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 08/14/2012] [Accepted: 09/05/2012] [Indexed: 06/01/2023]
Abstract
At room temperature, the enhanced effect of water vapor on ozone catalytic oxidation (OZCO) of formaldehyde to CO2 over MnOx catalysts and the reaction stability was reported. In a dry air stream, only below 20% of formaldehyde could be oxidized into CO2 by O3. In humid air streams (RH≥55%), ∼100% of formaldehyde were oxidized into CO2 by O3 and the reaction stability was significantly enhanced. Meanwhile, in situ Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectra of OZCO of HCHO demonstrate that the amount of both monodentate and bidentate carbonate species on MnOx, in the dry stream, increased gradually with time on stream (TOS). However, in the humid stream, almost no accumulation of carbonate species on the catalysts was observed. To clarify the enhanced mechanism, formaldehyde surface reactions and CO2 adsorption/desorption on the fresh, O3 and O3+H2O treated MnOx catalysts were examined comparatively.
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Affiliation(s)
- De-Zhi Zhao
- Laboratory of Plasma Physical Chemistry, School of Physics and Optoelectronic Engineering & School of Chemistry, Dalian University of Technology, Dalian 116024, China
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Ilieva L, Petrova P, Tabakova T, Zanella R, Abrashev M, Sobczak J, Lisowski W, Kaszkur Z, Andreeva D. Relationship between structural properties and activity in complete benzene oxidation over Au/CeO2–CoOx catalysts. Catal Today 2012. [DOI: 10.1016/j.cattod.2012.03.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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35
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Ozone Catalytic Oxidation of HCHO in Air over MnOx at Room Temperature. CHINESE JOURNAL OF CATALYSIS 2012. [DOI: 10.1016/s1872-2067(11)60360-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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36
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LONG L, ZHAO J, YANG L, FU M, WU J, HUANG B, YE D. Room Temperature Catalytic Ozonation of Toluene over MnO2/Al2O3. CHINESE JOURNAL OF CATALYSIS 2011. [DOI: 10.1016/s1872-2067(10)60216-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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