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Huang P, Li Y, Shu Y, Liang S, Huang X, Gan Y, Li G, Huang H. Abatement of VOCs mixture of emerging concern by VUV-PCO process: From lab to pilot scale. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159295. [PMID: 36228796 DOI: 10.1016/j.scitotenv.2022.159295] [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: 09/13/2022] [Revised: 10/01/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
As a kind of emerging pollutant, volatile organic compounds (VOCs) are getting increasing attention due to their contribution to the formation of atmospheric haze and O3. Photocatalytic oxidation under vacuum ultraviolet photocatalytic oxidation (VUV-PCO) presents a promising method for VOCs degradation, but it is seldom studied for VOCs compound and the mechanism is still elusive. Herein, typical VOCs such as toluene and ethyl acetate were degraded separately or together in VUV system and in VUV-PCO system with the designed trifunctional catalyst Mn/TiO2/ZSM-5. Intermediates were recognized by PTR-TOF-MS. It is found that dual VOCs mixture outperformed single VOCs under both VUV process and VUV-PCO process. Possible degradation mechanisms were proposed. To explore the potential practicality of VUV-PCO technology, scale-up synthesis of Mn/TiO2/ZSM-5 on ceramic foams was successfully carried out and assembled into a homemade pilot-scale VUV-PCO equipment for the control of simulated VOCs complex (toluene, ethyl acetate, ethanol, and acetone). Pilot-scale catalytic testing with the monolithic catalysts achieved high removal efficiency (over 90 % efficiency after two cycles of regeneration) and confirmed the practical application possibility of VUV-PCO technology in multiple VOCs degradation. This work probes into the VUV-PCO technology applicability from lab scale to pilot scale and promotes the understanding of VUV and VUV-PCO in VOCs complex decomposition.
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Affiliation(s)
- Pingli Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Yiheng Li
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Yajie Shu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China; Institute of Solid-State Physics, Chinese Academy of Sciences, Hefei, China.
| | - Shimin Liang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Xiongfei Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Yanling Gan
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, China.
| | - Guangqin Li
- School of Chemistry, Sun Yat-Sen University, Guangzhou, China
| | - Haibao Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China.
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Jiang N, Qiu C, Guo L, Shang K, Lu N, Li J, Zhang Y, Wu Y. Plasma-catalytic destruction of xylene over Ag-Mn mixed oxides in a pulsed sliding discharge reactor. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:611-620. [PMID: 30825807 DOI: 10.1016/j.jhazmat.2019.02.087] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 02/22/2019] [Accepted: 02/24/2019] [Indexed: 06/09/2023]
Abstract
Plasma-assisted catalytic degradation of xylene was performed in a pulsed sliding dielectric barrier discharge (SLDBD) reactor based on three-electrode geometry over Ag-Mn bimetallic oxides catalysts at room temperature. Experimental results showed that more active species were distributed uniformly in the SLDBD plasma than traditional surface dielectric barrier discharge (SDBD), contributing to higher degradation and energy performance. The xylene degradation efficiency and energy yield in the SLDBD reactor driven by both +pulse (+18 kV) and -DC (-10 kV) were 40% and 2.3 g/kWh higher, respectively, than in the SDBD reactor energized by +pulse alone. The combination of SLDBD plasma with catalysts significantly improved the xylene degradation efficiency and CO2 selectivity than the plasma-only system. The incorporation of Ag into Mn oxide further enhanced its catalytic activity for xylene degradation, and the catalytic activity of Ag-Mn oxides was closely correlated with the Ag/Mn molar ratio. Ag-Mn/γ-Al2O3 (1:2) presented the best performance in plasma-catalysis process, with 91.5% of degradation efficiency and 80.1% of CO2 selectivity at 4.6 W. The higher proportion of surface Oads and better reducibility through the interaction between Ag and Mn species can explain the excellent reactivity of Ag-Mn/γ-Al2O3 (1:2).
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Affiliation(s)
- Nan Jiang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China; State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Cheng Qiu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Lianjie Guo
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Kefeng Shang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Na Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jie Li
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ying Zhang
- College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China
| | - Yan Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People's Republic of China, Dalian 116024, China; Institute of Electrostatics and Special Power, School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
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Kuśtrowski P, Rokicińska A, Kondratowicz T. Abatement of Volatile Organic Compounds Emission as a Target for Various Human Activities Including Energy Production. ADVANCES IN INORGANIC CHEMISTRY 2018. [DOI: 10.1016/bs.adioch.2018.05.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Yu H, Zhong S, Zhu B, Huang W, Zhang S. Synthesis and CO Oxidation Activity of 1D Mixed Binary Oxide CeO 2-LaO x Supported Gold Catalysts. NANOSCALE RESEARCH LETTERS 2017; 12:579. [PMID: 29098472 PMCID: PMC5668222 DOI: 10.1186/s11671-017-2352-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
One-dimensional (1D) Ce-La nanorods with different La contents (Ce and La in the molar ratio of 1:0, 3:1, 1:1, 1:3, and 0:1) were synthesized by hydrothermal process. Au/Ce-La nanorod catalysts were obtained by a modified deposition-precipitation method. The samples were characterized by N2 adsorption-desorption (BET), ICP, X-ray diffraction (XRD), SEM, TEM, EDX, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), and temperature-programmed reduction (H2-TPR). It revealed that La existed as LaO x in the 1D nanorods. The catalysis results demonstrated that the mixed binary Ce-La nanorod oxides could be a good support for gold catalysts. The contents of La had an important influence on the catalytic performance of Au/Ce-La nanorod catalysts. Among the catalysts, when the Ce/La molar ratio was 3:1, the 1.0%Au/Ce0.75-La0.25 nanorods pretreated at 300 °C showed the best activity among the catalysts for CO oxidation, which could convert CO completely at 30 °C. The catalysts also performed high temperature resistance and good stability for CO oxidation at the reaction temperatures of 40, 70, and 200 °C.
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Affiliation(s)
- Huanhuan Yu
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry (MOE), and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Siyuan Zhong
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry (MOE), and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Baolin Zhu
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry (MOE), and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Weiping Huang
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry (MOE), and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Shoumin Zhang
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry (MOE), and TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
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Pan H, Jian Y, Chen C, He C, Hao Z, Shen Z, Liu H. Sphere-Shaped Mn 3O 4 Catalyst with Remarkable Low-Temperature Activity for Methyl-Ethyl-Ketone Combustion. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:6288-6297. [PMID: 28467843 DOI: 10.1021/acs.est.7b00136] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mn3O4, FeMnOx, and FeOx catalysts synthesized via a solvothermal method were employed for catalytic oxidation of methyl-ethyl-ketone (MEK) at low temperature. Mn3O4 with sphere-like morphology exhibited the highest activity for MEK oxidation, over which MEK was completely oxidized to CO2 at 200 °C, and this result can be comparable to typical noble metal loaded catalysts. The activation energy of MEK over Mn3O4 (30.8 kJ/mol) was much lower than that of FeMnOx (41.5 kJ/mol) and FeOx (47.8 kJ/mol). The dominant planes, surface manganese species ratio, surface-absorbed oxygen, and redox capability played important roles in the catalytic activities of catalysts, while no significant correlation was found between specific surface area and MEK removal efficiency. Mn3O4 showed the highest activity, accounting for abundant oxygen vacancies, low content of surface Mn4+ and strong reducibility. The oxidation of MEK to CO2 via an intermediate of diacetyl is a reaction pathway on Mn3O4 catalyst. Due to high efficiency and low cost, sphere-shaped Mn3O4 is a promising catalyst for VOCs abatement.
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Affiliation(s)
- Hua Pan
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Yanfei Jian
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Changwei Chen
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Chi He
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University , Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Zhengping Hao
- Department of Environmental Nano-materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
| | - Zhenxing Shen
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Hongxia Liu
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
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