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Peng Z, Liu H, Zhang C, Zhai Y, Hu W, Tan Y, Li X, Zhou Z, Gong X. Potential Strategy to Control the Organic Components of Condensable Particulate Matter: A Critical Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:7691-7709. [PMID: 38664958 DOI: 10.1021/acs.est.3c10615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
More and more attention has been paid to condensable particulate matter (CPM) since its emissions have surpassed that of filterable particulate matter (FPM) with the large-scale application of ultralow-emission reform. CPM is a gaseous material in the flue stack but instantly turns into particles after leaving the stack. It is composed of inorganic and organic components. Organic components are an important part of CPM, and they are an irritant, teratogenic, and carcinogenic, which triggers photochemical smog, urban haze, and acid deposition. CPM organic components can aggravate air pollution and climate change; therefore, consideration should be given to them. Based on existing methods for removing atmospheric organic pollutants and combined with the characteristics of CPM organic components, we provide a critical overview from the aspects of (i) fundamental cognition of CPM, (ii) common methods to control CPM organic components, and (iii) catalytic oxidation of CPM organic components. As one of the most encouraging methods, catalytic oxidation is discussed in detail, especially in combination with selective catalytic reduction (SCR) technology, to meet the growing demands for multipollutant control (MPC). We believe that this review is inspiring for a fuller understanding and deeper exploration of promising approaches to control CPM organic components.
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Affiliation(s)
- Zhengkang Peng
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hanxiao Liu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- Zhejiang Feida Environmental Science & Technology Co., Ltd., Zhuji 311800, China
- Zhejiang Environmental Protection Group Eco-Environmental Research Institute, Hangzhou 310030, China
| | - Chuxuan Zhang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yunfei Zhai
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wei Hu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yuyao Tan
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiaomin Li
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zijian Zhou
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xun Gong
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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John AT, Tricoli A. Flame assisted synthesis of nanostructures for device applications. ADVANCES IN PHYSICS: X 2022. [DOI: 10.1080/23746149.2021.1997153] [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] Open
Affiliation(s)
- Alishba T John
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, The Australian National University, Canberra, Australia
| | - Antonio Tricoli
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, The Australian National University, Canberra, Australia
- Nanotechnology Research Laboratory, School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Camperdown, Australia
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The Synthesis of Cu–Mn–Al Mixed-Oxide Combustion Catalysts by Co-Precipitation in the Presence of Starch: A Comparison of NaOH with Organic Precipitants. Catalysts 2022. [DOI: 10.3390/catal12101159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Cu–Mn mixed oxides are well known as active combustion catalysts. The common method for their synthesis is based on co-precipitation, with NaOH as a precipitant, and is burdened with the possibility of introducing undesired Na contamination. This work describes the use of two organic bases, tetrabutylammonium hydroxide and choline hydroxide, as precipitating agents in a novel alkali-free route for Cu–Mn–Al catalyst synthesis. To obtain fine crystalline precursors, which are considered advantageous for the preparation of active catalysts, co-precipitation was carried out in the presence of starch gel. Reference materials prepared with NaOH in the absence of starch were also obtained. Mixed oxides were produced by calcination at 450 °C. The precursors contained MnCO3 doped with Cu and Al, and an admixture of amorphous phases. Those prepared in the presence of starch were less crystalline and retained biopolymer residues. The combustion of these residues during calcination enhanced the formation of larger amounts of the Cu1.5Mn1.5O4 spinel phase, with better crystallinity in comparison to catalysts prepared from conventionally synthesized precursors. Tests of toluene combustion demonstrated that the catalysts prepared with starch performed better than those obtained in starch-free syntheses, and that the mixed oxides obtained by the alkali-free route were more active than catalysts prepared with NaOH. Catalytic data are discussed in terms of property–performance relationships.
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Barama A, Hadj-Sadok Ouaguenouni M, Barama S. Structural, Textural Properties and Catalytic Activity of Ni–Mn Mixed Oxides in the Combustion of Toluene at Low-Temperatures. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-07276-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Du Y, Xiao G, Guo Z, Lin B, Fu M, Ye D, Hu Y. A high-performance and stable Cu/Beta for adsorption-catalytic oxidation in-situ destruction of low concentration toluene. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155288. [PMID: 35429572 DOI: 10.1016/j.scitotenv.2022.155288] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/02/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Finding a cost-effective treatment to remove of low concentrations of volatile organic compounds (VOCs) is still a challenge. In this study, a Cu/Beta material was developed for in situ adsorption-catalytic oxidation of low concentrations of toluene. The results showed that the addition of Cu enhanced the adsorption and catalytic oxidation of toluene by Beta zeolite. Cu7/Beta with a Cu+ ratio of close to 50% performed best. The high adsorption of Cu7/Beta was mainly attributed to the abundant Cu+ species and the micro-mesoporous structure of the Beta zeolite, and the high catalytic oxidation was attributed to the lattice oxygen in the uniformly dispersed CuO. Finally, the adsorption intermediates and reaction pathways in the catalytic oxidation of toluene were clarified using XPS and DRIFTS spectra. This work provides new strategies for the development of efficient and stable adsorption-catalytic oxidation in situ destruction materials.
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Affiliation(s)
- Yueying Du
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Gaofei Xiao
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Ziyang Guo
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Beilong Lin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China.
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Magnesium-Modified Co3O4 Catalyst with Remarkable Performance for Toluene Low Temperature Deep Oxidation. Catalysts 2022. [DOI: 10.3390/catal12040411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Co3O4, MgCo2O4 and MgO materials have been synthesized using a simple co-precipitation approach and systematically characterized. The total conversion of toluene to CO2 and H2O over spinel MgCo2O4 with wormlike morphology has been investigated. Compared with single metal oxides (Co3O4 and MgO), MgCo2O4 with the highest activity has exhibited almost 100% oxidation of toluene at 255 °C. The obtained results are analogous to typical precious metal supported catalysts. The activation energy of toluene over MgCo2O4 (38.5 kJ/mol) is found to be much lower than that of Co3O4 (68.9 kJ/mol) and MgO ((87.8 kJ/mol)). Compared with the single Co and Mg metal oxide, the as-prepared spinel MgCo2O4 exhibits a larger surface area, highest absorbed oxygen and more oxygen vacancies, thus highest mobility of oxygen species due to its good redox capability. Furthermore, the samples specific surface area, low-temperature reducibility and surface adsorbed oxygenated species ratio decreased as follows: MgCo2O4 > Co3O4 > MgO; which is completely in line with the catalytic performance trends and constitute the reasons for MgCo2O4 high excellent activity towards toluene total oxidation. The overall finding supported by ab initio molecular dynamics simulations of toluene oxidation on the Co3O4 and MgCo2O4 suggest that the catalytic process follows a Mars–van Krevelen mechanism.
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Long Y, He Z, Li X, Yin Y, Wang Y, Li H, Hu J. Removal of elemental mercury from flue gas using the magnetic attapulgite by Mn-Cu oxides modification. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:14058-14069. [PMID: 34601680 DOI: 10.1007/s11356-021-16777-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
Mercury pollution has become one of the most concerned environmental issues in the world because of its high toxicity, non-degradability, and bioaccumulation. Attapulgite adsorbents modified by magnetic manganese-copper (MnxCuy-MATP) were fabricated by co-precipitation and ultrasonic impregnation method, aiming at removing Hg0 from coal-fired flue gas. BET, SEM, XRD, VSM, and XPS were used to systematically explore the physical and chemical properties of the adsorbents, the effects of manganese and copper additions, reaction temperature, and various components in the flue gas on the efficiency of Hg0 removal were investigated. Mn8Cu5-MATP exhibited the optimal properties, and excessive copper loadings led to the aggregation of the active components. The efficiency of mercury removal can be effectively improved by NO and HCl regardless of the absence and presence of O2, because the NO+, NO3, NO2, and Cl* produced during the reaction can promote the adsorption and oxidation of Hg0. SO2 and H2O inhibited the oxidation of Hg0 because of the competitive adsorption at the active sites, while a large amount of sulfite and sulfate were formed to block the pores. However, the introduction of copper caused the sample to obtain SO2 resistance, which resulted in a mercury removal efficiency of 84.3% even under 1500 ppm SO2. In addition, after 5 cycles of adsorption and regeneration, Mn8Cu5-MATP can still maintain excellent Hg0 removal ability. The fabricated adsorbent can save the actual production cost and effectively improve the mercury removal efficiency in sulfur-containing flue gas.
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Affiliation(s)
- Yifei Long
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China
| | - Zhong He
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China
| | - Xiaoyi Li
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China
| | - Yajie Yin
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China
| | - Yuan Wang
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China
| | - Honghu Li
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China
| | - Jiangjun Hu
- School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei, 430079, People's Republic of China.
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Huang R, Luo L, Hu W, Tang Z, Ji X, Chen L, Yu Z, Zhang Y, Zhang D, Xiao P. Insight into the pH effect on the oxygen species and Mn chemical valence of Co–Mn catalysts for total toluene oxidation. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00357k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mn-Based metal oxides have shown promising performance in catalytic oxidation of toluene due to the mixed Mn3+ and Mn4+ valences and in large numbers of oxygen vacancy clusters on the surface.
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Affiliation(s)
- Rui Huang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Li Luo
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Wei Hu
- Chongqing Academy of Ecological and Environmental Science, Chongqing 401147, China
| | - Zhixin Tang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Xing Ji
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Leqi Chen
- College of Physics, Chongqing University, Chongqing 400044, China
| | - Zhaoshi Yu
- College of Physics, Chongqing University, Chongqing 400044, China
| | - Yunhuai Zhang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Dan Zhang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
- Chongqing Academy of Ecological and Environmental Science, Chongqing 401147, China
| | - Peng Xiao
- College of Physics, Chongqing University, Chongqing 400044, China
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Kim SC, Kim MK, Jung SC, Jung HY, Kim H, Park YK. Effect of palladium on the black mass-based catalyst prepared from spent Zn/Mn alkaline batteries for catalytic combustion of volatile organic compounds. CHEMOSPHERE 2021; 276:130209. [PMID: 34088094 DOI: 10.1016/j.chemosphere.2021.130209] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/01/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
A large amount of spent batteries is produced annually. When spente batteries are buried, their harmful components may contaminate soil and water. Therefore, recycling of spent batteries is essential for environmental reasons. We evaluated the BM (black mass) of spent Zn/Mn alkaline batteries as a catalyst substance for the catalytic combustion of volatile organic compounds (VOCs: benzene, toluene, and o-xylene). The SBM catalyst (black mass-based catalyst) was prepared by treating BM with 0.1 N of sulfuric acid solution. Major elements of the SBM catalyst were manganese, zinc, iron, aluminum, potassium, and sodium except for carbon. In addition, to find out the additive effect of palladium on the SBM catalyst, we prepared the Pd/SBM catalysts using a conventional impregnation method. We investigated the physicochemical properties of the SBM and Pd/SBM catalysts by instrumental analysis. Benzene, toluene, and o-xylene (BTX) were oxidized completely over the SBM catalyst at reaction temperatures less than 410, 340, and 410 °C, respectively (gas hourly space velocity: 40,000 h-1). As expected, for the Pd/SBM catalysts, increasing the palladium loading on the SBM from 0.1 wt% to 1.0 wt% increased the conversions of BTX. In the 1.0 wt% Pd/SBM catalyst, the reaction temperatures for catalytic combustion of BTX were greatly reduced to 310, 260, and 250 °C, respectively (gas hourly space velocity: 40,000 h-1). Instrumental analysis indicated that the increase in activity by adding palladium resulted from the active ingredient (palladium oxide: PdO) and better redox properties.
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Affiliation(s)
- Sang Chai Kim
- Department of Environmental Education, Mokpo National University, Muan, 58554, Republic of Korea
| | - Min Ki Kim
- Department of Environmental Education, Mokpo National University, Muan, 58554, Republic of Korea
| | - Sang-Chul Jung
- Department of Environmental Engineering, Sunchon National University, Sunchon, 57975, Republic of Korea
| | - Ho-Young Jung
- Department of Environment and Energy Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyunook Kim
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea.
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Park YK, Jung SC, Jung HY, Foong SY, Lam SS, Kim SC. Performance of platinum doping on spent alkaline battery-based catalyst for complete oxidation of o-xylene. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:24552-24557. [PMID: 32533488 DOI: 10.1007/s11356-020-09575-6] [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: 04/02/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
Oxidation of o-xylene was performed using alkaline battery-based catalyst doped with platinum to investigate the properties and activities. O-xylene was selected as the model of volatile organic compound (VOC) in this work. Physicochemical properties of the selected catalysts were characterized by FE/TEM (field emission transmission electron microscopy), BET (Brunauer-Emmett-Teller) analysis, XRD (X-ray powder diffraction), SEM/EDX (scanning electron microscopy/energy dispersive X-ray spectroscopy), and H2-TPR (hydrogen temperature programmed reduction). Major elements of the spent alkaline battery-based catalyst treated with sulfuric acid solution [SAB (400) catalyst] were manganese, zinc, iron, oxygen, carbon, chlorine, aluminum, sodium, silicon, and potassium. Increasing the doping amount of platinum on SAB (400) catalyst from 0.1 to 1 wt% increased particle size of platinum and lowered the temperature of TPR (TTP) for SAB (400) catalyst. Better redox properties were achieved with an increase in the o-xylene conversion according to the doping amount of platinum. When GHSV (gas hourly space velocity) was 40,000 h-1, o-xylene was oxidized completely over SAB (400) catalyst and 1.0 wt% Pt/SAB(400) catalyst at temperatures of 400 °C and 280 °C, respectively.
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Affiliation(s)
- Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Sang-Chul Jung
- Department of Environmental Engineering, Sunchon National University, Sunchon, 57975, Republic of Korea
| | - Ho-Young Jung
- Department of Environment and Energy Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Shin Ying Foong
- Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Su Shiung Lam
- Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Sang Chai Kim
- Department of Environmental Education, Mokpo National University, 61, Muan, 58554, Republic of Korea.
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Influence of Alumina Precursor Properties on Cu-Fe Alumina Supported Catalysts for Total Toluene Oxidation as a Model Volatile Organic Air Pollutant. Catalysts 2021. [DOI: 10.3390/catal11020252] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The structure–property relationship of catalytic supports for the deposition of redox-active transition metals is of great importance for improving the catalytic efficiency and reusability of the catalysts. In this work, the role of alumina support precursors of Cu-Fe/Al2O3 catalysts used for the total oxidation of toluene as a model volatile organic air pollutant is elucidated. Surface characterization of the catalysts revealed that the surface area, pore volume and acid site concentration of the alumina supports are important but not the determining factors for the catalytic activity of the studied catalysts for this type of reaction. The determining factors are the structural order of the support precursor, the homogeneous distribution of the catalytic sites and reducibility, which were elucidated by XRD, NMR, TEM and temperature programed reduction (TPR). Cu–Fe/Al2O3 prepared from bayerite and pseudoboehmite as highly ordered precursors showed better catalytic performance compared to Cu-Fe/Al2O3 derived from the amorphous alumina precursor and dawsonite. Homogeneous distribution of FexOy and CuOx with defined Cu/Fe molar ratio on the Al2O3 support is required for the efficient catalytic performance of the material. The study showed a beneficial effect of low iron concentration introduced into the alumina precursor during the alumina support synthesis procedure, which resulted in a homogeneous metal oxide distribution on the support.
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Effect of the variation of metal and cerium loadings on CeO2x–TiO2(100−x) supports in the complete catalytic oxidation of formaldehyde. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04299-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Synthesis and Characterization of CoxOy–MnCO3 and CoxOy–Mn2O3 Catalysts: A Comparative Catalytic Assessment Towards the Aerial Oxidation of Various Kinds of Alcohols. Processes (Basel) 2020. [DOI: 10.3390/pr8080910] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
CoxOy–manganese carbonate (X%)(CoxOy–MnCO3 catalysts (X = 1–7)) were synthesized via a straightforward co-precipitation strategy followed by calcination at 300 °C. Upon calcination at 500 °C, these were transformed to CoxOy–dimanganese trioxide i.e., (X%)CoxOy–Mn2O3. A relative catalytic evaluation was conducted to compare the catalytic efficiency of the two prepared catalysts for aerial oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) using O2 molecule as a clean oxidant without utilizing any additives or alkalis. Amongst the different percentages of doping with CoxOy (0–7% wt./wt.) on MnCO3 support, the (1%)CoxOy–MnCO3 catalyst exhibited the highest catalytic activity. The influence of catalyst loading, calcination temperature, reaction time, and temperature and catalyst dosage was thoroughly assessed to find the optimum conditions of oxidation of benzyl alcohol (BzOH) for getting the highest catalytic efficiency. The (1%)CoxOy–MnCO3 catalyst which calcined at 300 °C displayed the best effectiveness and possessed the largest specific surface area i.e., 108.4 m2/g, which suggested that the calcination process and specific surface area play a vital role in this transformation. A 100% conversion of BzOH along with BzH selectivity >99% was achieved after just 20 min. Notably, the attained specific activity was found to be considerably larger than the previously-reported cobalt-containing catalysts for this transformation. The scope of this oxidation reaction was expanded to various alcohols containing aromatic, aliphatic, allylic, and heterocyclic alcohols without any further oxidation i.e., carboxylic acid formation. The scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET) specific surface area analytical techniques were used to characterize the prepared catalysts. The obtained catalyst could be easily regenerated and reused for six consecutive runs without substantial decline in its efficiency.
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Abstract
In recent years, the impending necessity to improve the quality of outdoor and indoor air has produced a constant increase of investigations in the methodologies to remove and/or to decrease the emission of volatile organic compounds (VOCs). Among the various strategies for VOC elimination, catalytic oxidation and recently photocatalytic oxidation are regarded as some of the most promising technologies for VOC total oxidation from urban and industrial waste streams. This work is focused on bimetallic supported catalysts, investigating systematically the progress and developments in the design of these materials. In particular, we highlight their advantages compared to those of their monometallic counterparts in terms of catalytic performance and physicochemical properties (catalytic stability and reusability). The formation of a synergistic effect between the two metals is the key feature of these particular catalysts. This review examines the state-of-the-art of a peculiar sector (the bimetallic systems) belonging to a wide area (i.e., the several catalysts used for VOC removal) with the aim to contribute to further increase the knowledge of the catalytic materials for VOC removal, stressing the promising potential applications of the bimetallic catalysts in the air purification.
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Zhu L, Pan S, Liu Z, Wei P, Liu Z, Yu P, Xu Y. Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b07086] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Lei Zhu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China
- National Supervision and Testing Center of Fine Chemicals, Taizhou 225300, China
| | - Shunlong Pan
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Zhiying Liu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Ping Wei
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Zhuyun Liu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Peng Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Yanhua Xu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China
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Li JR, Wang FK, He C, Huang C, Xiao H. Catalytic total oxidation of toluene over carbon-supported Cu Co oxide catalysts derived from Cu-based metal organic framework. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.12.060] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Zhou X, Shang Y, Wei W, Lin T, Wang J, Lai X, Wang J, Chen Y. Effect of a mixed precursor over monolith MnO x/La–Al 2O 3 catalyst for toluene oxidation. NEW J CHEM 2020. [DOI: 10.1039/d0nj01432j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The MNMA catalyst prepared with a mixed precursor of Mn(NO3)2 and Mn(Ac)2·4H2O possesses more α-MnO2 species and good dispersion and is more active for toluene oxidation.
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Affiliation(s)
- Xiaoying Zhou
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
- Chengdu Research Academy of Environmental Sciences
| | - Yingnan Shang
- Chengdu Research Academy of Environmental Sciences
- Chengdu 610000
- China
| | - Wei Wei
- Chengdu Research Academy of Environmental Sciences
- Chengdu 610000
- China
| | - Tao Lin
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
| | - Jiecai Wang
- Chengdu Research Academy of Environmental Sciences
- Chengdu 610000
- China
| | - Xiaoxiao Lai
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
| | - Jianli Wang
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
| | - Yaoqiang Chen
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
- College of New Energy and Low-Carbon Technology
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Lyu Y, Li C, Du X, Zhu Y, Zhang Y, Li S. Catalytic removal of toluene over manganese oxide-based catalysts: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:2482-2501. [PMID: 31848947 DOI: 10.1007/s11356-019-07037-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
It is necessary to control the emissions of toluene, which is hazardous to both human health and the atmosphere environment and has been classified as a priority pollutant. Manganese oxide-based (Mn-based) catalysts have received increased attention due to their high catalytic performance, good physicochemical characteristic, availability in various crystal structures and morphologies, and being environmentally friendly and low cost. These catalysts can be classified into five categories, namely single manganese oxide, Mn-based composite oxides, Mn-based special oxides, supported Mn-based oxides, and Mn-based monoliths. This review focused on the recent progress on the five types of Mn-based catalysts for catalytic removal of toluene at low temperature and further systematically summarized the strategies improving catalysts, including improving synthetic methods, incorporating MnOx with other metal oxides, depositing Mn-based oxides on proper supports, and tuning the supports. Moreover, the effect of coexisting components, the reaction kinetics, and the oxidation mechanisms toward the removal of toluene were also discussed. Finally, the future research direction of this field was presented.
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Affiliation(s)
- Yue Lyu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, People's Republic of China
| | - Caiting Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, People's Republic of China.
| | - Xueyu Du
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, People's Republic of China
| | - Youcai Zhu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, People's Republic of China
| | - Yindi Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, People's Republic of China
| | - Shanhong Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, People's Republic of China
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20
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Zhang X, Zhao H, Song Z, Zhao J, Ma Z, Zhao M, Xing Y, Zhang P, Tsubaki N. Influence of hydrothermal synthesis temperature on the redox and oxygen mobility properties of manganese oxides in the catalytic oxidation of toluene. TRANSIT METAL CHEM 2019. [DOI: 10.1007/s11243-019-00331-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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21
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Zhang S, Guo Y. Effects of large CuO contents on the performance of Pd/Al2O3-CuO catalysts in ethanol oxidation reaction. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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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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23
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The Titanium–Aluminum Binary Oxide Immobilized over Long-Axis SBA-15 as Efficient and Benign Catalyst for Conversion of Sucrose into 5-Hydroxymethylfurfural. CATALYSIS SURVEYS FROM ASIA 2019. [DOI: 10.1007/s10563-019-09267-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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24
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Wei TS, Pan KL, Yu SJ, Yan SY, Chang MB. Storage and reduction of NO x by combining Sr-based perovskite catalyst with nonthermal plasma. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:35582-35593. [PMID: 30353430 DOI: 10.1007/s11356-018-3475-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
A novel NOx storage and reduction (NSR) system is developed for NOx removal by integrating Sr-based perovskite catalyst with nonthermal plasma (NTP)-assisted process. In this hybrid system, Sr-based perovskite catalyst is applied for NOx adsorption in the lean-burn condition while NTP is used as a desorption-reduction step to convert NOx into N2 under rich-burn condition. Innovative Sr-based perovskites including SrKMnCoO4/BaO/Al2O3 (SKMCBA), SrKMnCeO4/BaO/Al2O3 (SKMCeBA), and SrKCoNiO4/BaO/Al2O3 (SKCNBA) are successfully prepared by impregnation method. Results indicate that SKMCBA possesses the highest NOx trapped (214 μmole NOx/gcatalyst) at 400 °C among 3 Sr-based perovskites investigated. High performance of SKMCBA for NOx adsorption is mainly attributed to the addition of Mn and Co which own good oxidation ability. Further, SKMCBA is combined with NTP-assisted process for NOx reduction. Result indicates that NOx conversion achieved with NTP-assisted process reaches 83% with the applied voltage of 18 kV and frequency of 10 kHz in the absence of reducing agent. Additionally, various reducing agents including hydrogen (H2), carbon monoxide (CO), and propene (C3H6) are introduced, individually, into the NTP reduction process, and the results indicate that performance of NSR with NTP can be effectively enhanced. Especially, 100% NOx conversion is achieved with H2-NTP. This study demonstrates that reduction of NOx via NTP-assisted process is promising.
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Affiliation(s)
- Tong Syuan Wei
- Graduate Institute of Environmental Engineering, National Central University, No.300, Jhongda Rd., Jhongli District, Taoyuan City, 32001, Taiwan
| | - Kuan Lun Pan
- Graduate Institute of Environmental Engineering, National Central University, No.300, Jhongda Rd., Jhongli District, Taoyuan City, 32001, Taiwan
| | - Sheng Jen Yu
- Green Energy and Environment Institute, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Shaw Yi Yan
- Green Energy and Environment Institute, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Moo Been Chang
- Graduate Institute of Environmental Engineering, National Central University, No.300, Jhongda Rd., Jhongli District, Taoyuan City, 32001, Taiwan.
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25
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Zhou X, Lai X, Lin T, Feng J, Hou Z, Chen Y. Preparation of a monolith MnOx–CeO2/La–Al2O3 catalyst and its properties for catalytic oxidation of toluene. NEW J CHEM 2018. [DOI: 10.1039/c8nj02908c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalyst DP-MnCe prepared by the deposition–precipitation method has the best catalytic activity for toluene oxidation.
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Affiliation(s)
- Xiaoying Zhou
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
| | - Xiaoxiao Lai
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
| | - Tao Lin
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
- Sichuan Provincial Vehicular Exhaust Gases Abatement Engineering Technology Center
- Chengdu 610064
| | - Jie Feng
- College of Chemical Engineering, Sichuan University
- Chengdu 610064
- China
| | - Zhongyan Hou
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
| | - Yaoqiang Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
- Sichuan Provincial Vehicular Exhaust Gases Abatement Engineering Technology Center
- Chengdu 610064
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26
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Mixed Zinc/Manganese on Highly Reduced Graphene Oxide: A Highly Active Nanocomposite Catalyst for Aerial Oxidation of Benzylic Alcohols. Catalysts 2017. [DOI: 10.3390/catal7120391] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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27
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Assal ME, Kuniyil M, Khan M, Al-Warthan A, Siddiqui MRH, Tremel W, Nawaz Tahir M, Adil SF. Synthesis and Comparative Catalytic Study of Zirconia-MnCO 3 or -Mn 2O 3 for the Oxidation of Benzylic Alcohols. Chemistry 2017; 6:112-120. [PMID: 28168156 PMCID: PMC5288761 DOI: 10.1002/open.201600116] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 11/06/2022]
Abstract
We report on the synthesis of the zirconia-manganese carbonate ZrOx(x %)-MnCO3 catalyst (where x=1-7) that, upon calcination at 500 °C, is converted to zirconia-manganese oxide ZrOx(x %)-Mn2O3 . We also present a comparative study of the catalytic performance of the both catalysts for the oxidation of benzylic alcohol to corresponding aldehydes by using molecular oxygen as the oxidizing agent. ZrOx(x %)-MnCO3 was prepared through co-precipitation by varying the amounts of Zr(NO3)4 (w/w %) in Mn(NO3)2. The morphology, composition, and crystallinity of the as-synthesized product and the catalysts prepared upon calcination were studied by using scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and powder X-ray diffraction. The surface areas of the catalysts [133.58 m2 g-1 for ZrOx(1 %)-MnCO3 and 17.48 m2 g-1 for ZrOx(1 %)-Mn2O3 ] were determined by using the Brunauer-Emmett-Teller method, and the thermal stability was assessed by using thermal gravimetric analysis. The catalyst with composition ZrOx(1 %)-MnCO3 pre-calcined at 300 °C exhibited excellent specific activity (48.00 mmolg-1 h-1) with complete conversion within approximately 5 min and catalyst cyclability up to six times without any significant loss in activity. The specific activity, turnover number and turnover frequency achieved is the highest so far (to the best of our knowledge) compared to the previously reported catalysts used for the oxidation of benzyl alcohol. The catalyst showed selectivity for aromatic alcohols over aliphatic alcohols.
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Affiliation(s)
- Mohamed E Assal
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia
| | - Mufsir Kuniyil
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia
| | - Mujeeb Khan
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia
| | - Abdulrahman Al-Warthan
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia
| | - Mohammed Rafiq H Siddiqui
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia
| | - Wolfgang Tremel
- Institute of Inorganic and Analytical Chemistry Johannes Gutenberg-University of Mainz 55128 Mainz Germany
| | - Muhammad Nawaz Tahir
- Institute of Inorganic and Analytical Chemistry Johannes Gutenberg-University of Mainz 55128 Mainz Germany
| | - Syed Farooq Adil
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia
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28
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Synthesis, Characterization, and Relative Study on the Catalytic Activity of Zinc Oxide Nanoparticles Doped MnCO3, –MnO2, and –Mn2O3 Nanocomposites for Aerial Oxidation of Alcohols. J CHEM-NY 2017. [DOI: 10.1155/2017/2937108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Zinc oxide nanoparticles doped manganese carbonate catalysts [X% ZnOx–MnCO3] (where X = 0–7) were prepared via a facile and straightforward coprecipitation procedure, which upon different calcination treatments yields different manganese oxides, that is, [X% ZnOx–MnO2] and [X% ZnOx–Mn2O3]. A comparative catalytic study was conducted to evaluate the catalytic efficiency between carbonates and oxides for the selective oxidation of secondary alcohols to corresponding ketones using molecular oxygen as a green oxidizing agent without using any additives or bases. The prepared catalysts were characterized by different techniques such as SEM, EDX, XRD, TEM, TGA, BET, and FTIR spectroscopy. The 1% ZnOx–MnCO3 calcined at 300°C exhibited the best catalytic performance and possessed highest surface area, suggesting that the calcination temperature and surface area play a significant role in the alcohol oxidation. The 1% ZnOx–MnCO3 catalyst exhibited superior catalytic performance and selectivity in the aerial oxidation of 1-phenylethanol, where 100% alcohol conversion and more than 99% product selectivity were obtained in only 5 min with superior specific activity (48 mmol·g−1·h−1) and 390.6 turnover frequency (TOF). The specific activity obtained is the highest so far (to the best of our knowledge) compared to the catalysts already reported in the literatures used for the oxidation of 1-phenylethanol. It was found that ZnOx nanoparticles play an essential role in enhancing the catalytic efficiency for the selective oxidation of alcohols. The scope of the oxidation process is extended to different types of alcohols. A variety of primary, benzylic, aliphatic, allylic, and heteroaromatic alcohols were selectively oxidized into their corresponding carbonyls with 100% convertibility without overoxidation to the carboxylic acids under base-free conditions.
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29
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Lee YH, Park JH, Shin CH. Physicochemical properties of manganese dioxide synthesized using C2–C5 alcohols as reducing agents and their catalytic activities for CO oxidation. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.08.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Zhang X, Pei Z, Wu T, Lu H, Huang H. A mechanistic study of the sulfur tolerance of Cu–V mixed oxides in toluene catalytic combustion. REACTION KINETICS MECHANISMS AND CATALYSIS 2015. [DOI: 10.1007/s11144-015-0912-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Wang W, Wang H, Zhu T, Fan X. Removal of gas phase low-concentration toluene over Mn, Ag and Ce modified HZSM-5 catalysts by periodical operation of adsorption and non-thermal plasma regeneration. JOURNAL OF HAZARDOUS MATERIALS 2015; 292:70-78. [PMID: 25795275 DOI: 10.1016/j.jhazmat.2015.03.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 03/04/2015] [Accepted: 03/05/2015] [Indexed: 06/04/2023]
Abstract
Ag/HZSM-5, Mn/HZSM-5, Ce/HZSM-5, Ag-Mn/HZSM-5 and Ce-Mn/HZSM-5 were prepared by impregnation method. Both their adsorption capacity and catalytic activity were investigated for the removal of gas phase low-concentration toluene by periodical operation of adsorption and non-thermal plasma regeneration. Results show that catalysts loaded with Ag (Ag/HZSM-5 and Ag-Mn/HZSM-5) had larger adsorption capacity for toluene than the other catalysts. And Ag-Mn/HZSM-5 displayed the best catalytic performance for both toluene oxidation by non-thermal plasma and byproducts suppression. On the other hand, the deactivated catalyst can be fully regenerated by calcining in air stream when its adsorption capacity and catalytic activity of the Ag-Mn/HZSM-5 catalyst was found to be decreased after 10 cycles of periodical adsorption and non-thermal regeneration.
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Affiliation(s)
- Wenzheng Wang
- School of Chemistry and Environment, Beihang University, Beijing 100191, PR China.
| | - Honglei Wang
- School of Chemistry and Environment, Beihang University, Beijing 100191, PR China
| | - Tianle Zhu
- School of Chemistry and Environment, Beihang University, Beijing 100191, PR China.
| | - Xing Fan
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China
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