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Aneggi E, Hussain S, Baratta W, Zuccaccia D, Goi D. Enhanced Heterogeneous Fenton Degradation of Organic Dyes by Bimetallic Zirconia-Based Catalysts. Molecules 2024; 29:2074. [PMID: 38731565 PMCID: PMC11085515 DOI: 10.3390/molecules29092074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
The qualitative impact of pollutants on water quality is mainly related to their nature and their concentration, but in any case, they determine a strong impact on the involved ecosystems. In particular, refractory organic compounds represent a critical challenge, and several degradation processes have been studied and developed for their removal. Among them, heterogeneous Fenton treatment is a promising technology for wastewater and liquid waste remediation. Here, we have developed mono- and bimetallic formulations based on Co, Cu, Fe, and Mn, which were investigated for the degradation of three model organic dyes (methylene blue, rhodamine B, and malachite green). The treated samples were then analyzed by means of UV-vis spectrophotometry techniques. Bimetallic iron-based materials achieved almost complete degradation of all three model molecules in very short time. The Mn-Fe catalyst resulted in the best formulation with an almost complete degradation of methylene blue and malachite green at pH 5 in 5 min and of rhodamine B at pH 3 in 30 min. The results suggest that these formulations can be applied for the treatment of a broad range of liquid wastes comprising complex and variable organic pollutants. The investigated catalysts are extremely promising when compared to other systems reported in the literature.
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Affiliation(s)
- Eleonora Aneggi
- Dipartimento di Scienze AgroAlimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, e INSTM, 33100 Udine, Italy; (W.B.); (D.Z.)
| | - Sajid Hussain
- Dipartimento Politecnico di Ingegneria e Architettura, Università di Udine, e INSTM, 33100 Udine, Italy; (S.H.); (D.G.)
- Dipartimento di Ingegneria Industriale, Università di Padova, 35131 Padova, Italy
| | - Walter Baratta
- Dipartimento di Scienze AgroAlimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, e INSTM, 33100 Udine, Italy; (W.B.); (D.Z.)
| | - Daniele Zuccaccia
- Dipartimento di Scienze AgroAlimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, e INSTM, 33100 Udine, Italy; (W.B.); (D.Z.)
| | - Daniele Goi
- Dipartimento Politecnico di Ingegneria e Architettura, Università di Udine, e INSTM, 33100 Udine, Italy; (S.H.); (D.G.)
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Ogugua PC, Wang E, Jinyang Z, Wang Q, Su H. Advancements in low-temperature NH 3-SCR of NO x using Ba-based catalysts: a critical review of preparation, mechanisms, and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:84972-84998. [PMID: 37393212 DOI: 10.1007/s11356-023-27703-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 05/12/2023] [Indexed: 07/03/2023]
Abstract
Presently, selective catalytic reduction (SCR), with either carbon monoxide, urea, hydrocarbons, hydrogen, or ammonia as a reductant, has become a nitrogen oxide (NOx) removal technology (NOx conversion) of many catalytic companies and diesel engine exhaust gas. Although, there exists a serious threat of low-temperature limitations. So far, certain scientists have shown that barium-based (Ba-based) catalysts have the potential to be highly effective at SCR of NOx at low temperatures when ammonia is used as the reducing agent. The process of NOx storage and reduction which alternate SCR is known as the Lean NOx trap. Herein, we give the condensed advancements and production of the catalysts that involve BaO in low-temperature NH3-SCR of NOx, the advantages of BaO catalysts compared to the recently hot electrocatalysis, the stability of BaO catalyst materials, and the condensed advancements and production of the catalysts that involve BaO in low-temperature NH3-SCR of NOx. These catalysts are viewed in the light of their preparation method, particulate, and posture in mixed oxides. Also, the characteristic features of Ba-based catalysts are carefully considered and briefed under the following areas: preparation method and precursor, crystallinity, calcination temperature, morphology, acid sites, the specific surface area for reaction, redox property, and activation energy of catalysts. More to these are the discussions on Eley-Rideal [E-R] and Langmuir-Hinshelwood [L-H] mechanisms, the H2O/SO2 and O2 permissiveness, and the NH3-SCR reaction mechanism over Ba-based catalysts highlighting their possible effects. Finally, we proposed the prospect and the likely future research plan for the low-temperature NH3-SCR of NOx.
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Affiliation(s)
- Paul Chinonso Ogugua
- School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Enlu Wang
- School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Zhou Jinyang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Qi Wang
- School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Huihui Su
- School of China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, 200240, China
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Jia Y, Zheng R, Yuan J, Zhang X, Wang R, Gu M, Zhang S, Chen Y, Guo L. Promoting catalytic performance by balancing acid and redox sites on Mn3O4–Mn2P2O7/TiO2 for selective catalytic reduction of NO by NH3 at low temperature. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Chen W, Zou R, Wang X. Toward an Atomic-Level Understanding of the Catalytic Mechanism of Selective Catalytic Reduction of NO x with NH 3. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Weibin Chen
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
| | - Ruqiang Zou
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
| | - Xidong Wang
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
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Baltrėnas P, Urbanas D, Sukackienė Z, Stalnionienė I, Tamašauskaitė-Tamašiūnaitė L, Balčiūnaitė A, Jasulaitienė V. Selective catalytic reduction of NO by NH 3 using Mn-based catalysts supported by Ukrainian clinoptiolite and lightweight expanded clay aggregate. ENVIRONMENTAL TECHNOLOGY 2022; 43:3269-3282. [PMID: 33881966 DOI: 10.1080/09593330.2021.1921046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
In this study, Mn-based multicomponent catalysts supported by two different carriers (lightweight expanded clay aggregate and the Ukrainian clinoptiolite) were prepared by electroless metal deposition method and tested for the selective catalytic reduction of NO with ammonia (NH3-SCR de-NO). Prior to the activity test, all the catalysts prepared were characterized by inductively coupled plasma optical emission spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray mapping, X-ray photoelectron spectroscopy, H2-TPR and NH3-TPD techniques. The particular interest of the present study was focused on the investigation of the carrier's role in the NO catalytic reduction and the promoting effect provided by the incorporation of the small amount of Pt (0.1 wt.%) in the Mn-based catalytic layer. The results revealed that the carrier's role in the NO catalytic conversion can be considered as a factor determining the effectiveness of the conversion process. Ukrainian clinoptiolite was proved to be a more attractive carrier for the preparation of the effective SCR de-NO catalysts due to its intrinsic sorption capacity, surface acidity and the redox potential. The high NO conversion efficiency provided by the Mn-based clinoptiolite-supported catalysts can be explained by the synergistic effect between the carrier and the active species deposited. It was shown that both the Mn97.6Cu2.4/clinoptiolite and the Mn97.5Co2.5/clinoptiolite catalysts can be successfully applied as the low-temperature (100-300°C) catalysts for NH3-SCR de-NO. When the NO removal efficiency varies in the range of 86-91%, the additional incorporation of Pt in the active layer in the amount of 0.1 wt.% can enhance the NO reduction by about 5% on average.
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Affiliation(s)
- Pranas Baltrėnas
- Faculty of Environmental Engineering, Vilnius Gediminas Technical University, Vilnius, Lithuania
| | - Davyd Urbanas
- Faculty of Environmental Engineering, Vilnius Gediminas Technical University, Vilnius, Lithuania
| | - Zita Sukackienė
- Center for Physical Sciences and Technology Vilnius, Lithuania
| | | | | | | | - Vitalija Jasulaitienė
- Faculty of Environmental Engineering, Vilnius Gediminas Technical University, Vilnius, Lithuania
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Chen J, Yang Y, Zhao S, Bi F, Song L, Liu N, Xu J, Wang Y, Zhang X. Stable Black Phosphorus Encapsulation in Porous Mesh-like UiO-66 Promoted Charge Transfer for Photocatalytic Oxidation of Toluene and o-Dichlorobenzene: Performance, Degradation Pathway, and Mechanism. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01375] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jinfeng Chen
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yang Yang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Shenghao Zhao
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Fukun Bi
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Liang Song
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Ning Liu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jingcheng Xu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jun Gong Road, Shanghai 200093, P. R. China
| | - Yuxin Wang
- Institute of Applied Biotechnology, Taizhou Vocation & Technical College, Taizhou 318000, Zhejiang, China
| | - Xiaodong Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
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Zhai G, Han Z, Du H, Gao Y, Pan X. An investigation on the promoting effect of Pr modification on SO 2 resistance over MnO x catalysts for selective reduction of NO with NH 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:17295-17308. [PMID: 34661840 DOI: 10.1007/s11356-021-17006-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
Pr-modified MnOx catalyst was synthesized through a facile co-precipitation process, and the results showed that MnPrOx catalyst exhibited much better selective catalytic reduction (SCR) activity and SO2 resistance performance than pristine MnOx catalyst. The addition of Pr in MnOx catalyst led to a complete NO conversion efficiency in 120-220 °C. Moreover, Pr-modified MnOx catalyst exhibited a superior resistance to H2O and SO2 compared with MnOx catalyst. After exposing to SO2 and H2O for 4 h, the NO conversion efficiency of MnPrOx catalyst could remain to 87.6%. The characterization techniques of XRD, BET, hydrogen-temperature programmed reduction (H2-TPR), ammonia-temperature programmed desorption (NH3-TPD), XPS, TG and in situ diffuse reflectance infrared spectroscopy (DRIFTS) were adopted to further explore the promoting effect of Pr doping in MnOx catalyst on SO2 resistance performance. The results showed that MnPrOx catalyst had larger specific surface area, stronger reducibility, and more L acid sites compared with MnOx catalyst. The relative percentage of Mn4+/Mnn+ on the MnPrOx-S catalyst surface was also much higher than those of MnOx catalyst. Importantly, when SO2 exists in feed gas, PrOx species in MnPrOx catalyst would preferentially react with SO2, thus protecting the Mn active sites. In addition, the introduction of Pr might promote the reaction between SO2 and NH3 rather than between SO2 and Mn active sites, which was also conductive to protect the Mn active sites to a great extent. Since the presence of SO2 in feed gas had little effect on NH3 adsorption on the MnPrOx catalyst surface, and the inhibiting effect of SO2 on NO adsorption was alleviated, SCR reactions could still proceed in a near-normal way through the Eley-Rideal (E-R) mechanism on Pr-modified MnOx catalyst, while SCR reactions through the Langmuir-Hinshelwood (L-H) mechanism were suppressed slightly.
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Affiliation(s)
- Guangpeng Zhai
- Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian, 116026, China
| | - Zhitao Han
- Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian, 116026, China.
- Liaoning Research, Center for Marine Internal Combustion Engine Energy-Saving, Dalian, 116026, China.
| | - Huan Du
- Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian, 116026, China
| | - Yu Gao
- Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian, 116026, China
| | - Xinxiang Pan
- Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian, 116026, China.
- Liaoning Research, Center for Marine Internal Combustion Engine Energy-Saving, Dalian, 116026, China.
- Guangdong Ocean University, Zhanjiang, 524088, Guangdong, China.
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Xu S, Cao Y, Liu Z. Dimethyl carbonate synthesis from CO2 and methanol over CeO2-ZrO2 catalyst. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106397] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Han Z, Du H, Xu D, Gao Y, Yang S, Song L, Dong J, Pan X. Fe and Mn mixed oxide catalysts supported on Sn-modified TiO 2 for the selective catalytic reduction of NO with NH 3 at low temperature. NEW J CHEM 2022. [DOI: 10.1039/d1nj05290j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
FeMn/SnxTiO2 catalysts were synthesized by introducing Sn as an additive to modify TiO2 supports, and the Sn doping could improve the SO2 tolerance and low-temperature SCR activity significantly.
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Affiliation(s)
- Zhitao Han
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Huan Du
- China Waterborne Transport Research Institute, Beijing 100088, China
| | - Duo Xu
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Yu Gao
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Shaolong Yang
- School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Liguo Song
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Jingming Dong
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Xinxiang Pan
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
- School of Electronic and Information Technology, Guangdong Ocean University, Zhanjiang 524088, China
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Shan W, Yu Y, Zhang Y, He G, Peng Y, Li J, He H. Theory and practice of metal oxide catalyst design for the selective catalytic reduction of NO with NH3. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.05.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Abstract
In this contribution, the three Mn-Zr catalysts with MnxZr1−xO2 hybrid phase were synthesized by two-step precipitation route (TP), conventional coprecipitation method (CP) and ball milling process (MP). The components, textural and redox properties of the Mn-Zr hybrid catalysts were studied via XRD, BET, XPS, HR-TEM, H2-TPR. Regarding the variation of synthesis routes, the TP and CP routes offer a more obvious advantage in the adjustment of the concentration of MnxZr1−xO2 solid solution compared to the MP process, which directly commands the content of Mn4+ and oxygen vacancy and lattice oxygen, and thereby leads to the enhanced mobility of reactive oxygen species and catalytic activity for toluene combustion. Moreover, the TP-Mn2Zr3 catalyst with the enriched exposure content of 51.4% for the defective (111) lattice plane of MnxZr1−xO2 exhibited higher catalytic activity and thermal stability for toluene oxidation than that of the CP-Mn2Zr3 sample with a value of 49.3%. This new observation will provide a new perspective on the design of bimetal catalysts with a higher VOCs combustion abatement.
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Li L, Ji J, Tan W, Song W, Wang X, Wei X, Guo K, Zhang W, Tang C, Dong L. Enhancing low-temperature NH3-SCR performance of Fe–Mn/CeO2 catalyst by Al2O3 modification. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.08.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Pr-modified MnO catalysts for selective reduction of NO with NH3 at low temperature. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.06.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Selective Catalytic Reduction of NO by NH3 over Mn–Cu Oxide Catalysts Supported by Highly Porous Silica Gel Powder: Comparative Investigation of Six Different Preparation Methods. Catalysts 2021. [DOI: 10.3390/catal11060702] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In this study, Mn-based catalysts supported by highly porous silica gel powder (SSA up to 470 m2·g−1 and total pore volume up to 0.8 cm3·g−1) were prepared by six different methods in liquid solutions (electroless metal deposition, stepwise addition of a reducing agent, wet impregnation, incipient wetness impregnation, urea hydrolysis, and ammonia evaporation) and tested for selective catalytic reduction of NOx with ammonia (NH3-SCR de-NOx). Prior to the activity test all the catalysts prepared were characterized by ICP-OES, SEM, EDX mapping, XPS, XRD and N2 adsorption techniques to provide the comprehensive information about their composition and morphology, investigate the dispersion of active components on the carrier surface, identify the chemical forms and structural properties of the catalytically active species of the catalysts prepared. The results revealed that all the methods applied for preparation of SCR de-NOx catalysts can ensure the uniform distribution of Mn species on the carrier surface, however as it is typical for preparation techniques in a liquid phase the significant reduction in SSA and pore volume along with increasing the loading was observed. Considering both the physicochemical properties and the catalytic performance of the catalysts the least effective preparation method was shown to be ammonia evaporation, while the most attractive techniques are incipient wetness impregnation and electroless metal deposition.
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Insight into the Promoting Role of Er Modification on SO2 Resistance for NH3-SCR at Low Temperature over FeMn/TiO2 Catalysts. Catalysts 2021. [DOI: 10.3390/catal11050618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Er-modified FeMn/TiO2 catalysts were prepared through the wet impregnation method, and their NH3-SCR activities were tested. The results showed that Er modification could obviously promote SO2 resistance of FeMn/TiO2 catalysts at a low temperature. The promoting effect and mechanism were explored in detail using various techniques, such as BET, XRD, H2-TPR, XPS, TG, and in-situ DRIFTS. The characterization results indicated that Er modification on FeMn/TiO2 catalysts could increase the Mn4+ concentration and surface chemisorbed labile oxygen ratio, which was favorable for NO oxidation to NO2, further accelerating low-temperature SCR activity through the “fast SCR” reaction. As fast SCR reaction could accelerate the consumption of adsorbed NH3 species, it would benefit to restrain the competitive adsorption of SO2 and limit the reaction between adsorbed SO2 and NH3 species. XPS results indicated that ammonium sulfates and Mn sulfates formed were found on Er-modified FeMn/TiO2 catalyst surface seemed much less than those on FeMn/TiO2 catalyst surface, suggested that Er modification was helpful for reducing the generation or deposition of sulfate salts on the catalyst surface. According to in-situ DRIFTS the results of, the presence of SO2 in feeding gas imposed a stronger impact on the NO adsorption than NH3 adsorption on Lewis acid sites of Er-modified FeMn/TiO2 catalysts, gradually making NH3-SCR reaction to proceed in E–R mechanism rather than L–H mechanism.
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Xu P, Zheng J, Jing F, Chu W. Influence of support precursor on FeCe-TiO2 for selective catalytic reduction of NO with ammonia. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111586] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Xu G, Guo X, Cheng X, Yu J, Fang B. A review of Mn-based catalysts for low-temperature NH 3-SCR: NO x removal and H 2O/SO 2 resistance. NANOSCALE 2021; 13:7052-7080. [PMID: 33889905 DOI: 10.1039/d1nr00248a] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The development of high-efficiency catalysts is the key to the low-temperature NH3-SCR technology. The introduction of SO2 and H2O will lead to poisoning and deactivation of the catalysts, which severely limits the development and application of NH3-SCR technology. This review introduces the necessity of NOx removal, explains the mechanisms of H2O and SO2 poisoning on NH3-SCR catalysts, highlights the Mn-based catalysts of different active metals and supports and their resistance to H2O and SO2, and analyses the relationship between metal modification, selection of support and preparation method, morphology and structure design and SO2/H2O resistance. Given the current problems, this review points out the future research focus of Mn-based catalysts and also puts forward corresponding countermeasures to solve the existing problems.
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Affiliation(s)
- Guiying Xu
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
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Gu S, Gui K, Ren D, Wei Y. The synergy between manganese oxide and iron oxide in NO catalytic removal with MnFeOx/SiO2 catalyst. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-020-01890-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
The effect of Mn impregnation on the NH3-SCR (selective catalytic reduction of NOx by NH3) activity of in situ synthesized Cu-SSZ-13 was investigated in this work. It was found that Mn addition could efficiently improve the low-temperature activity of Cu-SSZ-13. The optimal amount of Mn was 5 wt.%, and NOx conversion was improved by more than 20% over a temperature range of 120 °C to 150 °C. SEM (scanning electron microscopy), XRD (X-ray diffraction), N2 adsorption-desorption, H2-TPR (temperature programmed reduction of H2), NH3-TPD (temperature programmed desorption of NH3) and in situ DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) experiments were conducted to investigate the changes in the zeolite structure, active sites, acid sites and reaction mechanism. The impregnated MnOx species caused a decline in the crystallinity of Cu-SSZ-13 but markedly improved the redox ability. Nitrate and nitrite species were observed in the Mn-modified Cu-SSZ-13, and the formation of these species was thought to cause the observed increase in low-temperature NH3-SCR activity. The results show that the addition of Mn is a promising method for promoting the low-temperature catalytic activity of Cu-SSZ-13.
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Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NOx with NH3. Catalysts 2020. [DOI: 10.3390/catal10101154] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Sb-containing catalysts (SbZrOx (SbZr), SbCeOx (SbCe), SbCeZrOx (SbCeZr)) were prepared by citric acid method and investigated for the selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR). SbCeZr outperformed SbZr and SbCe and exhibited the highest activity with 80% NO conversion in the temperature window of 202–422 °C. Meanwhile, it also had good thermal stability and resistance against H2O and SO2. Various characterization methods, such as XRD, XPS, H2-TPR, NH3-TPD, and in situ diffuse reflectance infrared Fourier transform (DRIFT), were applied to understand their different behavior in NOx removal. The presence of Sb in the metal oxides led to the difference in acid distribution and redox property, which closely related with the NH3 adsorption and NO oxidation. Brønsted acid and Lewis acid were evenly distributed on SbCe, while Brønsted acid dominated on SbCeZr. Compared with Brønsted acid, Lewis acid was slightly active in NH3-SCR. The competition between NH3 adsorption and NO oxidation was dependent on SbOx and metal oxides, which were found on SbCe while not on SbCeZr.
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Modification of V 2O 5-WO 3/TiO 2 Catalyst by Loading of MnO x for Enhanced Low-Temperature NH 3-SCR Performance. NANOMATERIALS 2020; 10:nano10101900. [PMID: 32977574 PMCID: PMC7598263 DOI: 10.3390/nano10101900] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/18/2020] [Accepted: 09/19/2020] [Indexed: 11/16/2022]
Abstract
V2O5-WO3/TiO2 as a commercial selective catalytic reduction (SCR) catalyst usually used at middle-high temperatures was modified by loading of MnOx for the purpose of enhancing its performance at lower temperatures. Manganese oxides were loaded onto V-W/Ti monolith by the methods of impregnation (I), precipitation (P), and in-situ growth (S), respectively. SCR activity of each modified catalyst was investigated at temperatures in the range of 100–340 °C. Catalysts were characterized by specific surface area and pore size determination (BET), X-ray diffraction (XRD), temperature programmed reduction (TPR), etc. Results show that the loading of MnOx remarkably enhanced the SCR activity at a temperature lower than 280 °C. The catalyst prepared by the in-situ growth method was found to be most active for SCR.
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Tian J, Li Y, Zhou X, Yao Y, Wang D, Dan J, Dai B, Wang Q, Yu F. Overwhelming low ammonia escape and low temperature denitration efficiency via MnO -decorated two-dimensional MgAl layered double oxides. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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The effects of manganese precursors on NO catalytic removal with MnOx/SiO2 catalyst at low temperature. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01772-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Yang L, Zhang X, Kan Q, Zhao B, Ma X. Effect of gas composition on nitric oxide removal from simulated flue gas with DBD-NPC method. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.01.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Han L, Cai S, Gao M, Hasegawa JY, Wang P, Zhang J, Shi L, Zhang D. Selective Catalytic Reduction of NOx with NH3 by Using Novel Catalysts: State of the Art and Future Prospects. Chem Rev 2019; 119:10916-10976. [DOI: 10.1021/acs.chemrev.9b00202] [Citation(s) in RCA: 568] [Impact Index Per Article: 113.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Lupeng Han
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Sixiang Cai
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
- School of Materials Science and Engineering, Hainan University, Haikou 570228, Hainan, China
| | - Min Gao
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Jun-ya Hasegawa
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Penglu Wang
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Jianping Zhang
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Liyi Shi
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
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26
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Improvement of NH3-SCR performance and SO2 resistance over Sn modified CeMoOx electrospun fibers at low temperature. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Yao X, Cao J, Chen L, Kang K, Chen Y, Tian M, Yang F. Doping effect of cations (Zr4+, Al3+, and Si4+) on MnO /CeO2 nano-rod catalyst for NH3-SCR reaction at low temperature. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(18)63204-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Han Z, Yu Q, Teng Z, Wu B, Xue Z, Qin Q. Effects of manganese content and calcination temperature on Mn/Zr-PILM catalyst for low-temperature selective catalytic reduction of NO x by NH 3 in metallurgical sintering flue gas. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:12920-12927. [PMID: 30888621 DOI: 10.1007/s11356-019-04837-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 03/08/2019] [Indexed: 06/09/2023]
Abstract
The effects of manganese content, carrier calcination temperature, and catalyst calcination temperature of manganese-based zirconium pillared intercalated montmorillonite (Mn/Zr-PILM) catalysts were investigated for low-temperature selective catalytic reduction of NOx by NH3 (NH3-SCR) in the metallurgical sintering flue gas. The physicochemical properties of these catalysts can be characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherm, and temperature-programmed desorption of ammonia (NH3-TPD). The 10Mn/Zr400-PILM(300) catalyst had the highest NOx conversion under excess oxygen conditions (15 vol% oxygen) and reached 91.8% NOx conversion at 200 °C. It was found that when the loading of manganese was 10 wt.%, the catalyst had the highest catalytic activity and the manganese-active component was highly dispersed on the Zr-PILM surface. The optimal calcination temperature of the Zr-PILM was 400 °C because the catalyst pore size was concentrated at 1.92 nm and the catalyst had the most acidic sites. And the optimum calcination temperature of the catalyst was 300 °C. This was because excessive calcination temperature promoted the manganese oxide polymerization and reduced the catalytic activity of the catalyst.
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Affiliation(s)
- Zhicheng Han
- School of Metallurgy, Northeastern University, P.O. Box 345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Qingbo Yu
- School of Metallurgy, Northeastern University, P.O. Box 345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China.
| | - Zhaolong Teng
- School of Metallurgy, Northeastern University, P.O. Box 345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Bin Wu
- School of Metallurgy, Northeastern University, P.O. Box 345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Zhijia Xue
- School of Metallurgy, Northeastern University, P.O. Box 345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
- College of Energy and Power Engineering, Shenyang Institute of Engineering, No. 18, PuChang Road, ShenBei District, Shenyang, 110136, Liaoning, People's Republic of China
| | - Qin Qin
- School of Metallurgy, Northeastern University, P.O. Box 345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
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29
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Zhang L, Li L, Ge C, Li T, Li C, Li S, Xiong F, Dong L. Promoting N2 Selectivity of CeMnOx Catalyst by Supporting TiO2 in NH3-SCR Reaction. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00650] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Zhang
- School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, People’s Republic of China
| | - Lulu Li
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Chengyan Ge
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, People’s Republic of China
| | - Tingzhen Li
- School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, People’s Republic of China
| | - Chuanjiang Li
- School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, People’s Republic of China
| | - Shuxin Li
- School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, People’s Republic of China
| | - Feng Xiong
- School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, People’s Republic of China
| | - Lin Dong
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
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30
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Improvement of catalytic activity over Mn-modified CeZrO catalysts for the selective catalytic reduction of NO with NH3. J Colloid Interface Sci 2018; 531:91-97. [DOI: 10.1016/j.jcis.2018.07.050] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 11/19/2022]
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31
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Han Z, Yu Q, Xie H, Liu K, Qin Q, Xue Z. Fabrication of manganese-based Zr-Fe polymeric pillared interlayered montmorillonite for low-temperature selective catalytic reduction of NO x by NH 3 in the metallurgical sintering flue gas. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32122-32129. [PMID: 30218339 DOI: 10.1007/s11356-018-3164-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 09/06/2018] [Indexed: 06/08/2023]
Abstract
A series of Zr-Fe (Zr/Fe = 4:0, 3:1, 2:2, 1:3, 0:4) polymeric pillared interlayered montmorillonite loading 10 wt.% MnOx (Mn/Zr-Fe-PILM) were investigated for the selective catalytic reduction of NOx by NH3 (NH3-SCR) in metallurgical sintering flue gas. The X-ray diffraction (XRD), N2 adsorption-desorption isotherm, scanning electron microscope (SEM), and ammonia temperature-programmed desorption (NH3-TPD) were used to analyze the physicochemical property. The Fe polymerized with Zr exchanged to montmorillonite can improve the Mn/Zr-Fe-PILM low-temperature NOx conversion and N2 selectivity. The Mn/Zr-Fe-PILM (1:3) shows the highest NOx conversion between 140 and 180 °C. The XRD results suggest that the growth of crystalline ZrO2 phase is intensely restrained for the Fe2O3 migration into the ZrO2 lattice. The ZrO2 and MnOx have an excellent dispersion in montmorillonite. The N2 adsorption result illustrates that the increase of Fe molar content in the Zr-Fe-PILM support increases the catalyst-specific surface area. The NH3-TPD results elucidate that the Mn/Zr-Fe-PILM (1:3) has the most total acid sites. Therefore, the low-temperature catalytic activity of the Mn/Zr-Fe-PILM (1:3) has been assigned to the large specific surface area, abundant acid sites, and the dispersion of metallic oxides.
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Affiliation(s)
- Zhicheng Han
- School of Metallurgy, Northeastern University, P.O, Box345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Qingbo Yu
- School of Metallurgy, Northeastern University, P.O, Box345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China.
| | - Huaqing Xie
- School of Metallurgy, Northeastern University, P.O, Box345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Kaijie Liu
- School of Metallurgy, Northeastern University, P.O, Box345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Qin Qin
- School of Metallurgy, Northeastern University, P.O, Box345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
| | - Zhijia Xue
- School of Metallurgy, Northeastern University, P.O, Box345, No.11, Lane 3, WenHua Road, HePing District, Shenyang, 110819, Liaoning, People's Republic of China
- College of Energy and Power Engineering, Shenyang Institute of Engineering, No. 18, PuChang Road, ShenBei District, Shenyang, 110136, Liaoning, People's Republic of China
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32
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Peng C, Liang J, Peng H, Yan R, Liu W, Wang Z, Wu P, Wang X. Design and Synthesis of Cu/ZSM-5 Catalyst via a Facile One-Pot Dual-Template Strategy with Controllable Cu Content for Removal of NOx. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03432] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cheng Peng
- College of Chemistry, Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China
| | - Jian Liang
- College of Chemistry, Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China
| | - Honggen Peng
- College of Chemistry, Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China
| | - Ran Yan
- College of Chemistry, Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China
| | - Wenming Liu
- College of Chemistry, Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China
| | - Zheng Wang
- State Key Laboratory of High-efficiency Utilization of Coal & Green Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Peng Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry and Molecular Engineering, East China Normal University, North Zhongshan Road 3663, 200062 Shanghai, China
| | - Xiang Wang
- College of Chemistry, Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China
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33
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Gao Y, Luan T, Zhang W, Li H. The promotional effects of cerium on the catalytic properties of Al2O3-supported MnFeOx for NO oxidation and fast SCR reaction. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3636-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Zhao D, Wang C, Yu F, Shi Y, Cao P, Dan J, Chen K, Lv Y, Guo X, Dai B. Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NO x with NH₃. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E620. [PMID: 30111727 PMCID: PMC6116200 DOI: 10.3390/nano8080620] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/09/2018] [Accepted: 08/10/2018] [Indexed: 11/21/2022]
Abstract
A two-dimensional MnAl-layered double oxide (LDO) was obtained by flash nanoprecipitation method (FNP) and used for the selective catalytic reduction of NOx with NH₃. The MnAl-LDO (FNP) catalyst formed a particle size of 114.9 nm. Further characterization exhibited rich oxygen vacancies and strong redox property to promote the catalytic activity at low temperature. The MnAl-LDO (FNP) catalyst performed excellent NO conversion above 80% at the temperature range of 100⁻400 °C, and N₂ selectivity above 90% below 200 °C, with a gas hourly space velocity (GHSV) of 60,000 h-1, and a NO concentration of 500 ppm. The maximum NO conversion is 100% at 200 °C; when the temperature in 150⁻250 °C, the NO conversion can also reach 95%. The remarkable low-temperature catalytic performance of the MnAl-LDO (FNP) catalyst presented potential applications for controlling NO emissions on the account of the presentation of oxygen vacancies.
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Affiliation(s)
- Dan Zhao
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Chao Wang
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Feng Yu
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Yulin Shi
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Peng Cao
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Jianming Dan
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Kai Chen
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Yin Lv
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
| | - Xuhong Guo
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Bin Dai
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
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35
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Wang C, Yu F, Zhu M, Shi Y, Dan J, Lv Y, Guo X, Dai B. Up-scaled flash nano-precipitation production route to develop a MnOx–CeO2–Al2O3 catalyst with enhanced activity and H2O resistant performance for NOx selective catalytic reduction with NH3. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.04.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Wu K, Yang M, Hu H, Liang J, Wu Y. ZrMn Oxides for Aqueous-Phase Ketonization of Acetic Acid: Effect of Crystal and Porosity. Chem Asian J 2018; 13:1180-1186. [PMID: 29498220 DOI: 10.1002/asia.201800114] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 02/16/2018] [Indexed: 11/07/2022]
Abstract
Aqueous-phase ketonization of bio-based acetic acid is important to improve the conversion efficiency of biomass resources. In this study, ZrMn mixed oxides (ZrMnOx ) with high aqueous-phase ketonization activity are synthetized through a carbonization/oxidation method (COM) and solvothermal method (STM). The results show that ZrMnOx prepared by COM possesses tetragonal ZrO2 , and hausmannite Mn3 O4 is observed only at a high oxidation temperature of 750 °C. Low-temperature and long oxidation results in decreased crystallinity and crystallite size, which is related to highly dispersed Mnn+ species. The catalysts with improved acid sites possess high ketonization activity. Surface areas and pore size of ZrMnOx synthetized by STM are controlled by the solvents for thermal treatment. Compared with water as solvent, ethanol increases the surface area and pore size, resulting in high ketonization activity.
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Affiliation(s)
- Kejing Wu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China.,Institute of New Energy Low-Carbon Technology, Sichuan University, Chengdu, 610065, P. R. China
| | - Mingde Yang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Husheng Hu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Junmei Liang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Yulong Wu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China.,Beijing Key Laboratory of Fine Ceramics, Beijing, 100084, P. R. China
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37
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Zhang Y, Huang T, Xiao R, Xu H, Shen K, Zhou C. A comparative study on the Mn/TiO 2-M(M = Sn, Zr or Al) O x catalysts for NH 3-SCR reaction at low temperature. ENVIRONMENTAL TECHNOLOGY 2018; 39:1284-1294. [PMID: 28504006 DOI: 10.1080/21622515.2017.1329345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 05/07/2017] [Indexed: 06/07/2023]
Abstract
A series of TiO2-M(M = Sn, Zr or Al) Ox were prepared and manganese oxide (MnOx) was supported on the carrier by the traditional impregnation method for low-temperature selective catalytic reduction (SCR) of NOx with ammonia as a reductant. The obtained catalysts were characterized by XRD, BET, high-resolution transmission electron microscope (HRTEM), H2-TPR, NH3-TPD, X-ray photoelectron spectroscopy (XPS) and in situ Fourier-transform infrared (FT-IR) and their catalytic activities for NOx reduction with NH3 in the presence of SO2 were investigated comparatively. The results showed that the highest NOx conversion of over 90% could be obtained with the Mn/Ti-Sn catalyst at a wide range of temperature window of 150-270°C. The combination of characterization techniques, such as BET, XRD and HRTEM, revealed that manganese oxides were well dispersed on Ti-Sn. H2-TPR suggested that Ti-Sn and Ti-Zr supports could enhance the reduction ability of catalysts. Accordingly, Mn/Ti-Al exhibited worse activity at low temperature. XPS results were in good agreement with H2-TPR results, and Mn/Ti-Sn had more surface-reducible species of Mn4+ ions and more surface-adsorbed oxygen species, which was conducive to SCR reaction. The in situ FT-IR spectra of NH3 adsorption indicated that all the modified catalysts had more Lewis acid sites and the amide species at 1506 cm-1 had a certain influence on the catalytic reaction at low temperature. Mn/Ti-Zr showed a stronger resistance to SO2 but Mn/Ti-Al was affected more adversely and all the catalysts could not be restored to the initial catalytic activity after stopping feeding SO2. NH3-TPD revealed that the total acid amount of the Mn/Ti-Sn sample was larger than other samples, which indicated that the Ti-Sn solid solution could provide more surface acid sites over the catalyst.
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Affiliation(s)
- Yaping Zhang
- a Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment , Southeast University , Nanjing , People's Republic of China
| | - Tianjiao Huang
- a Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment , Southeast University , Nanjing , People's Republic of China
| | - Rui Xiao
- a Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment , Southeast University , Nanjing , People's Republic of China
| | - Haitao Xu
- a Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment , Southeast University , Nanjing , People's Republic of China
| | - Kai Shen
- a Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment , Southeast University , Nanjing , People's Republic of China
| | - Changcheng Zhou
- a Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment , Southeast University , Nanjing , People's Republic of China
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38
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Xin Y, Li H, Zhang N, Li Q, Zhang Z, Cao X, Hu P, Zheng L, Anderson JA. Molecular-Level Insight into Selective Catalytic Reduction of NOx with NH3 to N2 over a Highly Efficient Bifunctional Va-MnOx Catalyst at Low Temperature. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00196] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ying Xin
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan 250022, People’s Republic of China
| | - Hao Li
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan 250022, People’s Republic of China
| | - Nana Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan 250022, People’s Republic of China
| | - Qian Li
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan 250022, People’s Republic of China
| | - Zhaoliang Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan 250022, People’s Republic of China
| | - Xiaoming Cao
- Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - P. Hu
- Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Lirong Zheng
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - James A. Anderson
- Surface Chemistry and Catalysis Group, Materials and Chemical Engineering, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
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39
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2D, 3D mesostructured silicas templated mesoporous manganese dioxide for selective catalytic reduction of NOx with NH3. J Colloid Interface Sci 2018; 516:254-262. [DOI: 10.1016/j.jcis.2018.01.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/08/2018] [Accepted: 01/12/2018] [Indexed: 11/24/2022]
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40
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Husnain N, Wang E, Li K, Anwar MT, Mehmood A, Gul M, Li D, Mao J. Iron oxide-based catalysts for low-temperature selective catalytic reduction of NO
x
with NH3. REV CHEM ENG 2018. [DOI: 10.1515/revce-2017-0064] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Selective catalytic reduction (SCR) is now an established NO
x
removal technology for industrial flue gas as well as for diesel engine exhaust gas. However, it is still a big challenge to develop a novel low-temperature catalyst for NH3-SCR of NO
x
, especially at a temperature below 200°C. In the past few years, many studies have demonstrated the potential of iron (Fe)-based catalysts as low-temperature catalysts for NH3-SCR of NO
x
. Herein, we summarize the recent progress and performance of Fe-based catalysts for low-temperature NH3-SCR of NO
x
. Catalysts are divided into three categories: single Fe
x
O
y
, Fe-based multimetal oxide, and Fe-based multimetal oxide with support catalysts. The catalytic activity and selectivity of Fe-based catalysts are systematically analyzed and summarized in light of some key factors such as activation energy, specific surface area, morphology, crystallinity, preparation method and precursor, acid sites, calcination temperature, other metal dopant/substitute, and redox property of catalysts. In addition, H2O/SO2 tolerance and the NH3-SCR reaction mechanism over Fe-based catalysts, including Eley-Rideal and Langmuir-Hinshelwood mechanism, are emphasized. Lastly, the perspectives and future research directions of low-temperature NH3-SCR of NO
x
are also proposed.
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Affiliation(s)
- Naveed Husnain
- School of Mechanical Engineering , Shanghai Jiao Tong University , Shanghai 200240 , China
- Department of Mechanical Engineering , Bahauddin Zakariya University , Multan 60800 , Pakistan
| | - Enlu Wang
- School of Mechanical Engineering , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Kai Li
- School of Mechanical Engineering , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Muhammad Tuoqeer Anwar
- School of Mechanical Engineering , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Aamir Mehmood
- Department of Mechanical Engineering , University of Engineering and Technology Lahore (FSD Campus) , Faisalabad 38000 , Pakistan
| | - Mustabshirha Gul
- Department of Mechanical Engineering , Bahauddin Zakariya University , Multan 60800 , Pakistan
| | - Deli Li
- School of Mechanical Engineering , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Jinda Mao
- School of Mechanical Engineering , Shanghai Jiao Tong University , Shanghai 200240 , China
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41
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Han Z, Yu Q, Xue Z, Liu K, Qin Q. Sm-doped manganese-based Zr–Fe polymeric pillared interlayered montmorillonite for low temperature selective catalytic reduction of NOx by NH3 in metallurgical sintering flue gas. RSC Adv 2018; 8:42017-42024. [PMID: 35558804 PMCID: PMC9092082 DOI: 10.1039/c8ra09434a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 12/11/2018] [Indexed: 11/21/2022] Open
Abstract
In this work, Sm-doped manganese supported Zr–Fe polymeric pillared interlayered montmorillonites (Mn/ZrFe-PILMs) were prepared for the low-temperature selective catalytic reduction (SCR) of NOx with NH3 in metallurgical sintering flue gas. These pillared interlayered montmorillonite catalysts were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy, nitrogen adsorption–desorption isotherm, ammonia temperature-programmed desorption, and hydrogen temperature-programmed reduction to study the influence of Sm doping on the SCR performance. The ZrFe-PILMs with a Mn/Sm molar ratio of 18 : 2 showed the excellent SCR activity among these catalysts, where a 95.5% NOx conversion ratio at 200 °C at a space velocity of 20 000 h−1 was obtained. Samarium oxide and manganese oxides were highly dispersed on the ZrFe-PILMs with different Mn/Sm molar ratios by the XRD results and SEM-EDS results. Meanwhile, the Mn–Sm/ZrFe-PILM (18 : 2) had the lowest temperature hydrogen reduction peak by H2-TPR results, which indicated that it had the lowest active bond energy on its surface. And the NH3-TPD results expressed that the Mn–Sm/ZrFe-PILM (18 : 2) had the most acidic sites, especially the weakly acidic sites. Therefore, it was found that the introduction of a small amount of Sm (Mn : Sm = 18 : 2) to Mn/ZrFe-PILM can significantly improve catalytic activity by the increased active oxygen component and the surface acidity. Trace amount of Sm-doped Mn-based Zr–Fe polymeric pillared interlayered montmorillonite promotes low temperature catalytic activity in excess oxygen.![]()
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Affiliation(s)
- Zhicheng Han
- School of Metallurgy
- Northeastern University
- Shenyang
- PR China
| | - Qingbo Yu
- School of Metallurgy
- Northeastern University
- Shenyang
- PR China
| | - Zhijia Xue
- School of Metallurgy
- Northeastern University
- Shenyang
- PR China
- College of Energy and Power Engineering
| | - Kaijie Liu
- School of Metallurgy
- Northeastern University
- Shenyang
- PR China
| | - Qin Qin
- School of Metallurgy
- Northeastern University
- Shenyang
- PR China
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42
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Mn/beta and Mn/ZSM-5 for the low-temperature selective catalytic reduction of NO with ammonia: Effect of manganese precursors. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(17)62983-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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43
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Vuong TH, Bartling S, Bentrup U, Lund H, Rabeah J, Atia H, Armbruster U, Brückner A. Synergistic effect of VOx and MnOx surface species for improved performance of V2O5/Ce0.5Ti0.5−xMnxO2−δ catalysts in low-temperature NH3-SCR of NO. Catal Sci Technol 2018. [DOI: 10.1039/c8cy02193g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Inserting adjacent Mn3+/Mn2+ and VO3+/VO2+ redox couples in Ce1−xTixO2 improves catalytic performance.
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Affiliation(s)
- Thanh Huyen Vuong
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
- School of Chemical Engineering
- Hanoi University of Science and Technology
| | - Stephan Bartling
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - Ursula Bentrup
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - Henrik Lund
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - Jabor Rabeah
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - Hanan Atia
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - Udo Armbruster
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - Angelika Brückner
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
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44
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Zhang B, Zhang S, Liu B, Shen H, Li L. High N2 selectivity in selective catalytic reduction of NO with NH3 over Mn/Ti–Zr catalysts. RSC Adv 2018; 8:12733-12741. [PMID: 35541254 PMCID: PMC9079636 DOI: 10.1039/c8ra00336j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/19/2018] [Indexed: 11/29/2022] Open
Abstract
A series of Mn-based catalysts were prepared by a wet impregnation method for the selective catalytic reduction (SCR) of NO with NH3. The Mn/Ti–Zr catalyst had more surface area, Lewis acid sites, and Mn4+ on its surface, and showed excellent activity and high N2 selectivity in a wide temperature range. NH3 and NO oxidation was investigated to gain insight into NO reduction and N2O formation. The formation of N2O was primarily dominated by the reaction of NO with NH3 in the presence of O2via the Eley–Rideal mechanism. An intimate synergistic effect existed between the Mn-based and the Ti–Zr support. It was demonstrated that the Ti–Zr support greatly promoted the catalytic performance of Mn-based catalysts. The Ti–Zr support greatly promotes the catalytic performance of Mn-based catalysts.![]()
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Affiliation(s)
- Bolin Zhang
- Institute for Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Shengen Zhang
- Institute for Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Bo Liu
- Institute for Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Hanlin Shen
- Institute for Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Lin Li
- Institute for Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
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45
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Zhang M, Huang B, Jiang H, Chen Y. Research progress in the SO 2 resistance of the catalysts for selective catalytic reduction of NO x. Chin J Chem Eng 2017. [DOI: 10.1016/j.cjche.2017.03.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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46
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Xu H, Yan N, Qu Z, Liu W, Mei J, Huang W, Zhao S. Gaseous Heterogeneous Catalytic Reactions over Mn-Based Oxides for Environmental Applications: A Critical Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:8879-8892. [PMID: 28662330 DOI: 10.1021/acs.est.6b06079] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Manganese oxide has been recognized as one of the most promising gaseous heterogeneous catalysts due to its low cost, environmental friendliness, and high catalytic oxidation performance. Mn-based oxides can be classified into four types: (1) single manganese oxide (MnOx), (2) supported manganese oxide (MnOx/support), (3) composite manganese oxides (MnOx-X), and (4) special crystalline manganese oxides (S-MnOx). These Mn-based oxides have been widely used as catalysts for the elimination of gaseous pollutants. This review aims to describe the environmental applications of these manganese oxides and provide perspectives. It gives detailed descriptions of environmental applications of the selective catalytic reduction of NOx with NH3, the catalytic combustion of volatile organic compounds, Hg0 oxidation and adsorption, and soot oxidation, in addition to some other environmental applications. Furthermore, this review mainly focuses on the effects of structure, morphology, and modified elements and on the role of catalyst supports in gaseous heterogeneous catalytic reactions. Finally, future research directions for developing manganese oxide catalysts are proposed.
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Affiliation(s)
- Haomiao Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
| | - Naiqiang Yan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
| | - Zan Qu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
| | - Wei Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
| | - Jian Mei
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
| | - Wenjun Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
| | - Songjian Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Minhang District, Shanghai, China
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47
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The CeOX and MnOX Nanocrystals Supported on TiO2–Graphene Oxide Catalysts and Their Selective Catalytic Reduction Properties at Low Temperature. CRYSTALS 2017. [DOI: 10.3390/cryst7060159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Yu C, Dong L, Chen F, Liu X, Huang B. Low-temperature SCR of NO x by NH 3 over MnO x/SAPO-34 prepared by two different methods: a comparative study. ENVIRONMENTAL TECHNOLOGY 2017; 38:1030-1042. [PMID: 27494642 DOI: 10.1080/09593330.2016.1216170] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
The low-temperature selective catalytic reduction (SCR) of NOx is a promising technology for removing NOx from flue gases. However, the vulnerability of Mn-based catalysts to SO2 and H2O poisoning makes them unsuitable for industrial application. Herein, catalysts based on the MnOx/SAPO-34 catalysts were prepared by conventional impregnation and an improved molecularly designed dispersion method for use in the low-temperature SCR. The improved molecularly designed catalyst containing 20 wt% of MnOx exhibited high low-temperature NH3-SCR activity. Nearly 90% of the NOx was converted exclusively to N2 at 160°C using this catalyst. The structure and morphological analyses of the catalyst showed that the amorphous MnOx was well dispersed on the surface of the support. The reasons for the high performance of the catalysts were ascertained using surface N2 adsorption, XPS, H2-TPR and NH3-TPD. The results of these analyses indicated that high specific surface area and the redox capability, of the abundant Mn4+ and Mn3+ species, coupled with the surface chemisorbed oxygen and strong acid sites had a significant effect on the SCR reaction. In addition, the effects of SO2 and H2O on activity of the catalysts were also investigated and it was found that the highly dispersed 20 wt% MnOx/SAPO-34 catalyst exhibited better SO2 poisoning resistance than the other impregnated catalysts.
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Affiliation(s)
- Chenglong Yu
- a School of Environment and Energy , South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou , People's Republic of China
| | - Lifu Dong
- a School of Environment and Energy , South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou , People's Republic of China
| | - Feng Chen
- a School of Environment and Energy , South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou , People's Republic of China
| | - Xiaoqing Liu
- a School of Environment and Energy , South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou , People's Republic of China
| | - Bichun Huang
- a School of Environment and Energy , South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou , People's Republic of China
- b Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control , South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou , People's Republic of China
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49
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Comparative study on sulfur poisoning of V2O5-Sb2O3/TiO2 and V2O5-WO3/TiO2 monolithic catalysts for low-temperature NH3-SCR. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.01.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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50
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Gao J, Fan G, Yang L, Cao X, Zhang P, Li F. Oxidative Esterification of Methacrolein to Methyl Methacrylate over Gold Nanoparticles on Hydroxyapatite. ChemCatChem 2017. [DOI: 10.1002/cctc.201601560] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun Gao
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 P.R. China
| | - Guoli Fan
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 P.R. China
| | - Lan Yang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 P.R. China
| | - Xinzhong Cao
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology; Institute of High Energy Physics, Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Peng Zhang
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology; Institute of High Energy Physics, Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Feng Li
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 P.R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering; Beijing 100029 P.R. China
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