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Zhang H, Wu G, Liu Q, Liu Z, Yang Q, Cui Q, Bao X, Yuan P. Bifunctional Cu-incorporated carbon nanospheres via in-situ complexation strategy as efficient toluene adsorbents and antibacterial agents. CHEMOSPHERE 2024; 349:140876. [PMID: 38081525 DOI: 10.1016/j.chemosphere.2023.140876] [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: 06/27/2023] [Revised: 11/11/2023] [Accepted: 11/30/2023] [Indexed: 01/10/2024]
Abstract
Carbon adsorbents have been widely used to remove indoor volatile organic compounds (VOCs), however, the proliferation of bacteria on the carbon adsorbents may deteriorate the indoor air quality and thus pose a serious threat to human health. Herein, we report the synthesis of antibacterial porous carbon spheres (carbonized aminophenol-formaldehyde resin, CAF) with well-dispersed Cu species via an in situ incorporation of Cu2+ during the polymerization of 3-aminophenol-formaldehyde resin followed by a thermal carbonization and reduction process. Compared with CAF, the Cu/CAF-x nanocomposites with Cu loading show a much higher specific surface area (>700 m2 g-1vs. 569 m2 g-1 for CAF). In addition, the pore size of Cu/CAF-x is ranging from 0.7 to 1.68 nm, which is exactly conducive to adsorb the toluene molecules. As a result, the toluene adsorption capacity is improved from 123.50 mg g-1 for CAF to >170 mg g-1 for Cu/CAF-x. More importantly, such adsorbents possess excellent antibacterial performance, the Cu/CAF-10 (10 wt% of Cu loading) with a concentration of 50 μg mL-1 can completely kill the E. coli within 30 min. Our work paves the way to the development of bifunctional adsorbents with both efficient VOCs adsorption and excellent antibacterial performance.
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Affiliation(s)
- Hongwei Zhang
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
| | - Guanghui Wu
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
| | - Qunhong Liu
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
| | - Zhichen Liu
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
| | - Qin Yang
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
| | - Qingyan Cui
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
| | - Xiaojun Bao
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China; Qingyuan Innovation Laboratory, Quanzhou, 362801, China
| | - Pei Yuan
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350002, China; Qingyuan Innovation Laboratory, Quanzhou, 362801, China.
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Chen Y, Xi J, Lu Y, Cai J. Removal of toluene via non-thermal plasma generated by applying rare-earth tungsten electrode and nanosecond pulsed power supply. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:609-621. [PMID: 38015402 DOI: 10.1007/s11356-023-31176-2] [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: 08/02/2023] [Accepted: 11/18/2023] [Indexed: 11/29/2023]
Abstract
The objective of this investigation is to evaluate the characteristics associated with degradation of toluene through the utilization of non-thermal plasma (NTP) generated via application of a low-work-function electrode and nanosecond pulsed power supply. Initially, a comparative analysis is made between toluene removal efficiency utilizing the low-work-function electrode and that achieved with the conventional stainless-steel electrode. The outcomes demonstrate that NTP generated by the low-work-function electrode exhibits markedly superior removal efficiency for toluene in comparison to the stainless-steel electrode operating at the same voltage. Subsequently, the impacts of voltage, pulse frequency, and initial concentration of toluene on the removal efficiency and production of by-products are investigated. It is found that as the voltage and frequency increase, the removal efficiency also increases, and a maximum toluene removal efficiency of 87.2% is achieved at a voltage of 12,000 V and pulse frequency of 2000 Hz. The removal efficiency first increases and then decreases with increasing toluene initial concentration. The investigation also finds that energy yield is negatively correlated with voltage and pulse frequency and positively correlated with the initial concentration. Finally, the reaction products were subjected to quantitative analysis using GC-MS. Based on the analysis results, potential reaction pathways are inferred.
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Affiliation(s)
- Yurun Chen
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210023, China
| | - Jianfei Xi
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210023, China.
| | - Yang Lu
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210023, China
| | - Jie Cai
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210023, China
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3
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Catalytic Non-thermal Plasma Reactor for Oxidative Degradation of Toluene Present in Low Concentration. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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4
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Zhao Y, Zhuang Y, Ye K, Wu Y, Luo C, Li D, Zhang Y, Yao J, Ali S. Decomposition of VOCs by a novel catalytic DBD plasma reactor: A pilot study. ChemistrySelect 2022. [DOI: 10.1002/slct.202201614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yafei Zhao
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Ye Zhuang
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Kai Ye
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Yifei Wu
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Changhe Luo
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Dan Li
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Yi Zhang
- Technology R&D Department Fujian Longking Co., Ltd. Longyan 364000 China
| | - Jin Yao
- School of Chemistry and Materials Science University of Chinese Academy of Sciences Hangzhou 310024 China
| | - Sajid Ali
- Department of Chemical and Biochemical Engineering Xiamen University Xiamen Fujian Xiamen 361005 China)
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Xu J, Zhang T, Fang S, Wu Z, Gao E, Zhu J, Yao S, Li J, Dai L, Liu W, Zhang B, Zhang J. Revealing the significant differences of CO plasma oxidation on β-MnO2 catalyst in in- and post-plasma catalysis configurations using operando DRIFTS-MS. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Efficient post-plasma catalytic degradation of toluene via series of Co–Cu/TiO2 catalysts. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04805-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Chang T, Wang Y, Wang Y, Zhao Z, Shen Z, Huang Y, Veerapandian SKP, De Geyter N, Wang C, Chen Q, Morent R. A critical review on plasma-catalytic removal of VOCs: Catalyst development, process parameters and synergetic reaction mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154290. [PMID: 35248631 DOI: 10.1016/j.scitotenv.2022.154290] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 02/28/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
It is urgent to control the emission of volatile organic compounds (VOCs) due to their harmful effects on the environment and human health. A hybrid system integrating non-thermal-plasma and catalysis is regarded as one of the most promising technologies for VOCs removal due to their high VOCs removal efficiency, product selectivity and energy efficiency. This review systematically documents the main findings and improvements of VOCs removal using plasma-catalysis technology in recent 10 years. To better understand the fundamental relation between different aspects of this research field, this review mainly addresses the catalyst development, key influential factors, generation of by-products and reaction mechanism of VOCs decomposition in the plasma-catalysis process. Also, a comparison of the performance in various VOCs removal processes is provided. Particular emphasis is given to the importance of the selected catalyst and the synergy of plasma and catalyst in the VOCs removal in the hybrid system, which can be used as a reference point for future studies in this field.
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Affiliation(s)
- Tian Chang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 - B4, 9000 Ghent, Belgium; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710049, China; State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Yu Wang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yaqi Wang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Zuotong Zhao
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Zhenxing Shen
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yu Huang
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710049, China
| | - Savita K P Veerapandian
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 - B4, 9000 Ghent, Belgium.
| | - Nathalie De Geyter
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 - B4, 9000 Ghent, Belgium
| | - Chuanyi Wang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Qingcai Chen
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Rino Morent
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 - B4, 9000 Ghent, Belgium
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A highly efficient multi-stage dielectric barrier discharge (DBD)-catalytic system for simultaneous toluene degradation and O3 elimination. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.09.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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Liang H, Wu G, Zhang H, Liu Q, Yang Q, Xiong S, Yue Y, Yuan P. Controllable synthesis of N-doped hollow mesoporous carbon with tunable structures for enhanced toluene adsorption. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Chang KL, Lin YC, Qiu MZ, Tu CW, Chang CP, Wu JL, Lin YC, Chang CK. Gas-phase isopropanol degradation by nonthermal plasma combined with Mn-Cu/-Al 2O 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:40693-40702. [PMID: 33245541 DOI: 10.1007/s11356-020-10721-3] [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: 04/08/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
In this study, the dielectric barrier discharge (DBD) induced by nonthermal plasma (NTP) technology was used for isopropanol (IPA) degradation. IPA, intermediate, final product, and ozone concentrations were analyzed using GC-MS, carbon dioxide detector, and ozone detector. The experimental flow rate and concentration were fixed to 1 L/min and 1200 ppm ± 10%, respectively. Different reaction procedures were proposed for self-made metal catalyst combined with a plasma system (plasma alone and γ-Al2O3 combined with plasma, Cu (5 wt%)/γ-Al2O3 combined with plasma, Mn (3 wt%)-Cu (5 wt%)/γ-Al2O3 combined with plasma). In addition, the effect of the carrier gas oxygen content (0%, 20%, and 100%) on IPA conversion and intermediate and carbon dioxide selectivity was also investigated. The results revealed that the Mn (F)-Cu/γ-Al2O3 combined with plasma exhibited more efficient IPA conversion. In the 100% oxygen environment, the IPA conversion rate increased from 79.32 to 99.99%, and carbon dioxide selectivity increased from 3.82 to 50.23%. IPA was completely converted after 60 min of plasma treatment with the acetone selectivity, carbon dioxide selectivity, and tail ozone concentration of 26.71% ± 1.27%, 50.23% ± 0.56%, and 1761 ± 11 ppm, respectively. This study proved that the current single planar DBD configuration is an effective advanced treatment technology for the decomposition of VOCs.
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Affiliation(s)
- Ken-Lin Chang
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Chieh Lin
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Ming-Ze Qiu
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chun-Wei Tu
- Environmental Resource and Management Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Chih-Ping Chang
- Environmental Resource and Management Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Jhong-Lin Wu
- Environmental Resource and Management Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Yung-Chang Lin
- Department of Electrical Engineering, Cheng Shiu University, Kaohsiung, Taiwan
- Department of Electrical Engineering, Cheng Shiu University, Kaohsiung, Taiwan
- Center for environmental Toxin and Emerging Contaminant Research, Cheng Shiu University, Kaohsiung, Taiwan
| | - Chien-Kuei Chang
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.
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11
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Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream. Catalysts 2021. [DOI: 10.3390/catal11070845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The abatement of toluene was studied in a sequential adsorption-plasma catalysis (APC) process. Within this process, Hopcalite was used as bifunctional material: as adsorbent (storage stage) and as catalyst via the oxidation of adsorbed toluene (discharge stage). It was observed that the desorption and oxidation activity of the adsorbed toluene was significantly affected the process variables. In addition, the adsorption time influenced the CO2 selectivity and CO2 yield by changing the interaction between the catalyst and the plasma generated species. At least four APC sequences were performed for each examined condition suggesting that Hopcalite is very stable under plasma exposure during all the sequences. Consequently, these results could contribute to advance the plasma–catalyst system with an optimal VOC oxidation efficiency. The catalytic activity, amount of toluene adsorbed, amount of toluene desorbed and product formation have been quantified by FT-IR. Moreover, the catalyst was characterized by XRD, H2-TPR, N2 adsorption–desorption analysis and XPS. Hopcalite shows a good CO2 selectivity and CO2 yield when the APC process is performed with an adsorption time of 20 min and a plasma treatment with a discharge power of 46 W which leads to a low energy cost of 11.6 kWh·m−3 and energy yields of toluene and CO2 of 0.18 (±0.01) g·kWh−1 and 0.48 (±0.06) g·kWh−1 respectively.
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Qin C, Bai W, Liu P, Huang J, Guo H, Huang X, Dang X, Yan D. Enhanced plasma mineralization of adsorbed toluene by optimization the hybrid support of Ag–Mn catalysts. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.08.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Zhou W, Guan Z, Zhao M, Li J. Characteristics and mechanism of toluene removal from gas by novelty array double dielectric barrier discharge combined with TiO 2/Al 2O 3 catalyst. CHEMOSPHERE 2019; 226:766-773. [PMID: 30965247 DOI: 10.1016/j.chemosphere.2019.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 03/30/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
A new reactor of array double dielectric barrier discharge (DDBD) combined with catalysis was prepared, and the effect of different factors on removal efficiency of toluene at pilot scale were investigated. The possible degradation mechanism was explored. The results indicate that the removal efficiency of toluene in the exhaust gas decreases with the increasing of the toluene initial concentration and the gas flow rate, but increases with the increasing of the specific energy density. When the air relative humidity is 55%, the removal efficiency of toluene is higher than that of the relative humidity by 85%. The results of XPS, FT-IR and GC-MS analysis show that the main intermediate products of removing toluene by DDBD combined with TiO2/Al2O3 catalyst are phenol, benzaldehyde, benzyl alcohol, benzoic acid, N-benzyl formamide, dimethyl terephthalate, dimethyl isophthalate and other substances. There are five possible pathways to degrade toluene by DDBD combined with TiO2/Al2O3.
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Affiliation(s)
- Wu Zhou
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Zheng Guan
- Environmental Science Research and Design Institute of Zhejiang Province, Hangzhou, 310007, China
| | - Mengge Zhao
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Jiwu Li
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China.
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Guo H, Liu X, Hojo H, Yao X, Einaga H, Shangguan W. Removal of benzene by non-thermal plasma catalysis over manganese oxides through a facile synthesis method. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:8237-8247. [PMID: 30701473 DOI: 10.1007/s11356-019-04264-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 01/15/2019] [Indexed: 06/09/2023]
Abstract
Three manganese oxide catalysts (MnOx) were synthesized via a simple method, and then they were introduced into the non-thermal plasma (NTP) system for benzene removal. The XRD and EXAFS results showed the MnOx were mainly in the Mn3O4 phase, and from the analysis of N2 adsorption/desorption isotherms, we knew the MnOx calcined at 250 °C (Mn250) had the largest surface area of 274.5 m2 g-1. Besides, Mn250 also exerted higher benzene adsorption capacity (0.430 mmol g-1) according to C6H6-TPD. O2-TPD indicated that Mn250 showed better oxygen mobility than Mn300. Moreover, by analyzing XPS results, it revealed that Mn250 exhibited rich abundant of surface adsorbed oxygen species (Oads) and moderate ratio of Mn4+/Mn3+, and the reducibility temperature was also the lowest among all the MnOx catalysts drawn by H2-TPR profiles. As a result, Mn250 combined with NTP could remove 96.9% of benzene at a low input power of 3 W (benzene concentration 200 ppm, and GHSV 60,000 mL gcat.-1 h-1), performing the best catalytic activity among the three catalysts and plasma only. Furthermore, the "NTP + Mn250" system also produced the highest CO2 concentration and lowest CO concentration in downstream, and the residual O3 after catalytic reaction was also the lowest, that is to say, the synergistic effect between NTP and Mn250 was more effective than other catalysts in benzene removal. Graphical abstract.
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Affiliation(s)
- Hao Guo
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China
- Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Xin Liu
- Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Hajime Hojo
- Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Xin Yao
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China
| | - Hisahiro Einaga
- Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka, 816-8580, Japan.
| | - Wenfeng Shangguan
- Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China.
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Toluene abatement through adsorption and plasma oxidation using ZSM-5 mixed with γ-Al2O3, TiO2 or BaTiO3. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.03.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Qin C, Huang X, Zhao J, Huang J, Kang Z, Dang X. Removal of toluene by sequential adsorption-plasma oxidation: Mixed support and catalyst deactivation. JOURNAL OF HAZARDOUS MATERIALS 2017; 334:29-38. [PMID: 28384555 DOI: 10.1016/j.jhazmat.2017.03.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 03/21/2017] [Accepted: 03/22/2017] [Indexed: 06/07/2023]
Abstract
A sequential adsorption-plasma oxidation system was used to remove toluene from simulated dry air using γ-Al2O3, HZSM-5, a mixture of the two materials or their supported Mn-Ag catalyst as adsorbents under atmospheric pressure and room temperature. After 120min of plasma oxidation, γ-Al2O3 had a better carbon balance (∼75%) than HZSM-5, but the CO2 yield of γ-Al2O3 was only ∼50%; and there was some desorption of toluene when γ-Al2O3 was used. When a mixture of HZSM-5 and γ-Al2O3 with a mass ratio of 1/2 was used, the carbon balance was up to 90% and 82% of this was CO2. The adsorption performance and electric discharge characteristics of the mixed supports were tested in order to rationalize this high COx yield. After seven cycles of sequential adsorption-plasma oxidation, support and Mn-Ag catalyst deactivation occurred. The support and catalyst were characterized before and after deactivation by SEM, a BET method, XRD, XPS and GC-MS in order to probe the mechanism of their deactivation. 97.6% of the deactivated supports and 76% of the deactivated catalysts could be recovered by O2 temperature-programmed oxidation.
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Affiliation(s)
- Caihong Qin
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
| | - Xuemin Huang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
| | - Junjie Zhao
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
| | - Jiayu Huang
- Research Center of Air Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Zhongli Kang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
| | - Xiaoqing Dang
- School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China.
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