1
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Zhou K, Hu M, Zhao T, Wang M, Cui B, Lai H, Shao Z, Li S, Zhao M. Sn2+ Regulated Thermal Stability of the Cerium Oxide Lattice During Soot Combustion. Catal Letters 2022. [DOI: 10.1007/s10562-022-04072-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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2
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Zhou J, Wang P, Chen A, Qu W, Zhao Y, Zhang D. NO x Reduction over Smart Catalysts with Self-Created Targeted Antipoisoning Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:6668-6677. [PMID: 35500206 DOI: 10.1021/acs.est.2c00758] [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] [Indexed: 06/14/2023]
Abstract
Selective catalytic reduction of NOx in the presence of alkali (earth) metals and heavy metals is still a challenge due to the easy deactivation of catalysts. Herein, NOx reduction over smart catalysts with self-created targeted antipoisoning sites is originally demonstrated. The smart catalyst consisted of TiO2 pillared montmorillonite with abundant cation exchange sites to anchor poisoning substances and active components to catalyze NOx into N2. It was not deactivated during the NOx reduction process in the presence of alkali (earth) metals and heavy metals. The enhanced surface acidity, reducible active species, and active chemisorbed oxygen species of the smart catalyst accounted for the remarkable NOx reduction efficiency. More importantly, the self-created targeted antipoisoning sites expressed specific anchoring effects on poisoning substances and protected the active components from poisoning. It was demonstrated that the tetrahedrally coordinated aluminum species of the smart catalyst mainly acted as self-created targeted antipoisoning sites to stabilize the poisoning substances into the interlayers of montmorillonite. This work paves a new way for efficient reduction of NOx from the complex flue gas in practical applications.
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Affiliation(s)
- Jialun Zhou
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Penglu Wang
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Aling Chen
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Wenqiang Qu
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Yufei Zhao
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
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3
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Zhang L, Lai Q, Liu Y, Li X, Zhang W, Xu X, Fang X, Xu J, Wang X. Study on the monolayer dispersion behavior of SnO 2 on ZSM-5 for NO x-SCR by C 3H 6: the remarkable promotional effects of air plasma treatment. Phys Chem Chem Phys 2022; 24:4212-4225. [PMID: 35128555 DOI: 10.1039/d1cp05567d] [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
Aiming to fabricate more practical catalysts for NOx-SCR with C3H6, SnO2/ZSM-5 having different SnO2 loadings was prepared and treated with DBD air plasma. The dispersion of SnO2 on the H-ZSM-5 support and their interactions were investigated with both experimental methods and DFT calculations. SnO2 displays evident monolayer dispersion behavior, getting a threshold of 0.271 mmol 100 m-2 support. Plasma treatment improves significantly the SnO2 dispersion, hence amplifying the monolayer dispersion threshold to 0.380 mmol 100 m-2. XPS and DFT calculations have testified that plasma treatment strengthens strongly the SnO2-ZSM-5 support interaction, mainly through donating electrons from Sn4+ to Al3+ in the support, thus improving the dispersion of SnO2 at the same loadings. Consequently, the catalytic performance is remarkably improved because of the generation of more abundant surface acid sites and superoxide species devoted to the reaction. The sample having a SnO2 loading near the monolayer dispersion threshold shows the optimal activity in the corresponding catalyst series, demonstrating an evident threshold effect. Over SnO2/ZSM-5, the reaction goes through a Langmuir-Hinshelwood pathway, involving the adsorption and activation of both NO and C3H6 molecules. Surface mono-dentate/bridged-nitrate and carbonate species are the main reaction intermediates.
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Affiliation(s)
- Lihong Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Qiang Lai
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Yaqian Liu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xian Li
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Wenqi Zhang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xianglan Xu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xiuzhong Fang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Junwei Xu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Xiang Wang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
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4
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Insight into the remarkable enhancement of NH3-SCR performance of Ce-Sn oxide catalyst by tungsten modification. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Zhang Y, Yang S, Zhu X, Xu X, Huang F, Yang Z, Sun C. Effects of sulfation on hematite for selective catalytic reduction of nitrogen oxides with ammonia. J Colloid Interface Sci 2022; 606:1445-1456. [PMID: 34492479 DOI: 10.1016/j.jcis.2021.08.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 11/29/2022]
Abstract
Hematite (α-Fe2O3) is a promising candidate for NH3 selective catalytic reduction (NH3-SCR) of NOx due to its good sulfur resistance. However, the activity of pure α-Fe2O3 is very low. In this work, α-Fe2O3 obtained excellent N2 selectivity and medium-high temperature activity via a simple surface sulfation method. The α-Fe2O3-350 (sulfated at 350 °C) sample showed an NO conversion rate of ~ 100% in the range of 275-350 °C and exhibited excellent H2O and SO2 resistance ability at 300 °C. Furthermore, pure α-Fe2O3 was used as a model catalyst to fully uncover the effect of sulfation on FeOx-based catalysts in NH3-SCR reactions. Structural characterization indicated that the degree of surface sulfation of the catalyst would be deepened with increasing temperature, and the states of sulfate species on α-Fe2O3 changed from surface sulfates to bulk-like sulfates. Although sulfation treatment reduced the redox properties of α-Fe2O3, it significantly increased its surface acidity and thus the activity. Excessive bulk-like sulfates induced a decrease in activity. Sulfation inhibited the adsorption of NOx on the α-Fe2O3 catalyst surface and reduced the thermal stability of nitrates at medium-high temperature. Thus, the Langmuir-Hinshelwood (L-H) mechanism was inhibited, and the reaction mainly followed the Eley-Rideal (E-R) mechanism.
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Affiliation(s)
- Yu Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China
| | - Shan Yang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China
| | - Xiaoyue Zhu
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China
| | - Xiaolin Xu
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China
| | - Fang Huang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China.
| | - Zhongnian Yang
- School of Chemical Engineering and Safety, Binzhou University, Binzhou 256600, PR China.
| | - Chuanzhi Sun
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China.
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6
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Tan Y, Li F, Zhao B, Chen W, Tian M. Hydrothermal Synthesis of a Ce-Zr-Ti Mixed Oxide Catalyst with Enhanced Catalytic Performance for a NH 3-SCR Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14823-14832. [PMID: 34915697 DOI: 10.1021/acs.langmuir.1c02597] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A series of mesoporous CeZrTiOx catalysts were prepared by a facile hydrothermal method. Compared with CeTiOx catalysts synthesized under the same conditions, the catalytic activity and anti-SO2 performance of the Ce1Zr1TiOx catalyst are greatly improved, and at the gas hourly space velocity (GHSV) of 60 000 h-1, the NOx removal efficiency is maintained at 90% in the temperature range of 290-500 °C. The catalytic effect of ZrO2 on the Ce-Ti catalyst NH3-SCR activity was elucidated through a series of characterizations. The results revealed that the doping of Zr could significantly improve and optimize the structure of Ce-Ti catalysts. At the same time, due to the doping of Zr, the synergistic effect between Ce and Zr in the CeZrTiOx catalyst can effectively increase oxygen mobility, total acid content, and surface adsorbed oxygen species and lead to a larger pore volume. In addition, the introduction of ZrO2 made the transformation of Ce4+ into Ce3+ more obvious, and the 2Ce4+ + Zr2+ ↔ 2Ce3+ + Zr4+ reaction greatly improved the reducibility of Ce1Zr1TiOx. Among them, the improvement of SCR performance and H2O/SO2 tolerance is due to the electronic interaction between Zr and Ce.
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Affiliation(s)
- Yifeng Tan
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Fan Li
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Bing Zhao
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Wenlin Chen
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Mengkui Tian
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
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7
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Enhancement of low-temperature NH3-SCR catalytic activity and H2O & SO2 resistance over commercial V2O5-MoO3/TiO2 catalyst by high shear-induced doping of expanded graphite. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.04.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Yu Y, Tan W, An D, Tang C, Zou W, Ge C, Tong Q, Gao F, Sun J, Dong L. Activity enhancement of WO3 modified FeTiO catalysts for the selective catalytic reduction of NO by NH3. Catal Today 2021. [DOI: 10.1016/j.cattod.2019.12.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Li L, Ge C, Ji J, Tan W, Wang X, Wei X, Guo K, Tang C, Dong L. Effects of different methods of introducing Mo on denitration performance and anti-SO2 poisoning performance of CeO2. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63778-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Liu W, Gao Z, Zhao X, Gao J, Yang R, Yu L. Promotion Effect of Chromium on the Activity and SO 2 Resistance of CeO 2–TiO 2 Catalysts for the NH 3-SCR Reaction. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00898] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wuyuan Liu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, 510006 Guangzhou, P. R. China
| | - Zihan Gao
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, 510006 Guangzhou, P. R. China
| | - Xiangyun Zhao
- Waygreen Technologies, Inc., Guangzhou 511441, China
| | - Jiajian Gao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Runnong Yang
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, 510006 Guangzhou, P. R. China
| | - Lin Yu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, 510006 Guangzhou, P. R. China
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11
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Fu Z, Zhang G, Tang Z, Zhang H. A Green CeO
2
−WO
3
/TiO
2
Medium‐Low Temperature de‐NO
x
Catalyst for Selective Catalytic Reduction of NO
x
with NH
3. ChemistrySelect 2021. [DOI: 10.1002/slct.202100598] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zihao Fu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China
- University of Chinese Academy of Sciences Beijing 100039 China
| | - Guodong Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China
| | - Zhicheng Tang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China
| | - Haitao Zhang
- Lanzhou Petrochemical Research Center Petrochemical Research Institute, Petro China Lanzhou 730060 China
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12
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Improvement on the Catalytic Performance of MoO3 Nanobelts for NH3-SCR Reaction by SnO2-Modification: Enhancement of Acidity and Redox Property. Catal Letters 2021. [DOI: 10.1007/s10562-021-03653-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Wan H, Zhang L, Li Y, Meng Q, Zhang Y, Duan T. Nanoscale water spray assisted synthesis of CAs@B-TiO 2core-shell nanospheres with enhanced visible-light photocatalytic activity. NANOTECHNOLOGY 2021; 32:285601. [PMID: 33032270 DOI: 10.1088/1361-6528/abbf69] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 10/08/2020] [Indexed: 06/11/2023]
Abstract
Increasing photoactive areas and oxygen vacancy to improve the separation and utilization of electrons and holes in a photocatalytic process are a guarantee for highly photocatalysis efficiency. In this work, we report a CAs@B-TiO2core-shell nanospheres via a nanoscale water spray assisted method to deposit of black titanium dioxide (B-TiO2) on carbon aerogel sphere (CAs) though slowly hydrolyzing of butyl titanate (e.g. TBOT) in an ethanol-water system. On this basis, furthermore, a facile one-step N2H4 · H2O treatment was used to introduces oxygen vacancies on the surface of TiO2coating layer forming black TiO2. Oxygen vacancies can extend the optical response range of the TiO2shell from the ultraviolet to the visible region, and increase conductivity and charge transport on the interface of core-shell structure. This study reveals the importance of surface oxygen vacancies for reducing band gaps and developing highly active photocatalysts under visible light.
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Affiliation(s)
- Hengcheng Wan
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Ling Zhang
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Yi Li
- State Key Laboratory of Environment-Friendly Energy Materials, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Qi Meng
- Sichuan Co-Innovation Center for New Energetic Materials, Mianyang 621010, People's Republic of China
| | - Youkui Zhang
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Tao Duan
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
- Sichuan Co-Innovation Center for New Energetic Materials, Mianyang 621010, People's Republic of China
- State Key Laboratory of Environment-Friendly Energy Materials, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
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14
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Tan W, Liu A, Xie S, Yan Y, Shaw TE, Pu Y, Guo K, Li L, Yu S, Gao F, Liu F, Dong L. Ce-Si Mixed Oxide: A High Sulfur Resistant Catalyst in the NH 3-SCR Reaction through the Mechanism-Enhanced Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:4017-4026. [PMID: 33656869 DOI: 10.1021/acs.est.0c08410] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Investigating catalytic reaction mechanisms could help guide the design of catalysts. Here, aimed at improving both the catalytic performance and SO2 resistance ability of catalysts in the selective reduction of NO by NH3 (NH3-SCR), an innovative CeO2-SiO2 mixed oxide catalyst (CeSi2) was developed based on our understanding of both the sulfur poisoning and reaction mechanisms, which exhibited excellent SO2/H2O resistance ability even in the harsh working conditions (containing 500 ppm of SO2 and 5% H2O). The strong interaction between Ce and Si (Ce-O-Si) and the abundant surface hydroxyl groups on CeSi2 not only provided fruitful surface acid sites but also significantly inhibited SO2 adsorption. The NH3-SCR performance of CeSi2 was promoted by an enhanced Eley-Rideal (E-R) mechanism in which more active acid sites were preserved under the reaction conditions and gaseous NO could directly react with adsorbed NH3. This mechanism-enhanced process was even further promoted on sulfated CeSi2. This work provides a reaction mechanism-enhanced strategy to develop an environmentally friendly NH3-SCR catalyst with superior SO2 resistance.
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Affiliation(s)
- Wei Tan
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | | | - Shaohua Xie
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | - Yong Yan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Thomas E Shaw
- Department of Chemistry, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), University of Central Florida, Orlando, Florida 32816, United States
| | | | | | - Lulu Li
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003 Jiangsu, China
| | | | | | - Fudong Liu
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
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15
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Zeng Y, Haw K, Wang Y, Zhang S, Wang Z, Zhong Q, Kawi S. Recent Progress of CeO
2
−TiO
2
Based Catalysts for Selective Catalytic Reduction of NO
x
by NH
3. ChemCatChem 2020. [DOI: 10.1002/cctc.202001307] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yiqing Zeng
- School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 P.R. China
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117582 Singapore
| | - Kok‐Giap Haw
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117582 Singapore
| | - Yanan Wang
- School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 P.R. China
| | - Shule Zhang
- School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 P.R. China
| | - Zhigang Wang
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117582 Singapore
| | - Qin Zhong
- School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 P.R. China
| | - Sibudjing Kawi
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117582 Singapore
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16
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Insights into the effects of sulfate species on CuO/TiO2 catalysts for NH3-SCR reactions. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111191] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Qi L, Sun Z, Tang Q, Wang J, Huang T, Sun C, Gao F, Tang C, Dong L. Getting insight into the effect of CuO on red mud for the selective catalytic reduction of NO by NH 3. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122459. [PMID: 32302885 DOI: 10.1016/j.jhazmat.2020.122459] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 02/27/2020] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
A series of copper-modified red mud catalysts (CuO/PRM) with different copper oxide contents were synthesized by wet impregnation method and investigated for selective catalytic reduction of NO by NH3 (NH3-SCR). The catalytic results demonstrated that the red mud catalyst with 7 wt% CuO content exhibited the excellent catalytic performance as well as resistance to water and sulfur poisoning. The red mud support and copper-containing catalysts were characterized by XRF, XRD, N2 adsorption-desorption, HRTEM, EDS mapping, XPS, H2-TPR, NH3-TPD and in situ DRIFT. The obtained results revealed that well dispersed copper oxide originating from 1 to 7 wt% CuO contents was more facile for the redox equilibrium of Cu2+ + Fe2+ ↔ Cu+ + Fe3+ shifting to right to form Cu+ and surface oxygen species than crystalline CuO generating from high CuO loading (9 wt% CuO), which was beneficial to the enhancement of reducibility and the formation of Lewis acid sites on the catalyst surface. All these factors made significant contributions to the improvement of NH3-SCR activities for CuO/PRM catalysts. Moreover, in situ DRIFT analysis combined with DFT calculated results confirmed that the finely dispersed copper species not only enhanced the NH3 activation but also promoted the NOx desorption, which synergistically facilitated the NH3-SCR process via the Eley-Rideal mechanism.
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Affiliation(s)
- Lei Qi
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China.
| | - Zhenguo Sun
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Qi Tang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Jin Wang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Taizhong Huang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Chuanzhi Sun
- School of the Environment, Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing, 210093, PR China
| | - Fei Gao
- School of the Environment, Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing, 210093, PR China
| | - Changjin Tang
- School of the Environment, Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing, 210093, PR China
| | - Lin Dong
- School of the Environment, Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing, 210093, PR China.
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18
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Niu C, Wang Y, Ren D, Xiao L, Duan R, Wang B, Wang X, Xu Y, Li Z, Shi JW. The deposition of VWOx on the CuCeOy microflower for the selective catalytic reduction of NOx with NH3 at low temperatures. J Colloid Interface Sci 2020; 561:808-817. [DOI: 10.1016/j.jcis.2019.11.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 10/25/2022]
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19
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Zeng Y, Song W, Wang Y, Zhang S, Wang T, Zhong Q. Novel Fe-doped CePO 4 catalyst for selective catalytic reduction of NO with NH 3: The role of Fe 3+ ions. JOURNAL OF HAZARDOUS MATERIALS 2020; 383:121212. [PMID: 31546215 DOI: 10.1016/j.jhazmat.2019.121212] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 09/10/2019] [Accepted: 09/10/2019] [Indexed: 06/10/2023]
Abstract
Novel Fe-doped CePO4 (FexCe1-x) catalyst was firstly successfully synthesized via a simple co-precipitation method and demonstrated excellent NH3-SCR performance in comparison with FePO4 and CePO4. In order to study the promoting effects of Fe3+ ion on the NH3-SCR activity of CePO4 catalyst, various characterizations were conducted. It was found that NH3 capacity of FexCe1-x catalyst was controlled by P sites and depended on their specific surface area. Interestingly, Fe species in FexCe1-x were not a Lewis acid site for NH3 adsorption, but it could promote the activation of NH3. More importantly, Fe3+ doping could induce the redox equilibrium of Fe3+ + Ce3+ ⇆ Fe2+ + Ce4+, which significantly improved redox properties of CePO4 catalyst. Accordingly, improved catalytic activity of FexCe1-x catalysts could be attributed to the collective effects of the higher surface area, better redox properties and easily activated NH3. Among them, superior redox property of FexCe1-x catalysts was the main reason boosting their high catalytic activity. Finally, the reaction process analyzed by in situ DRIFT proposed that the NH3-SCR reaction over CePO4 and FexCe1-x occurred mainly via Eley-Rideal mechanism. We anticipated this work could promote the development of novel NH3-SCR catalyst.
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Affiliation(s)
- Yiqing Zeng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Wang Song
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Yanan Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Shule Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
| | - Tianxiao Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Qin Zhong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
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20
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Li L, Li P, Tan W, Ma K, Zou W, Tang C, Dong L. Enhanced low-temperature NH3-SCR performance of CeTiO catalyst via surface Mo modification. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63437-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Wu Z, Zeng Y, Song F, Zhang S, Zhong Q. Active sites assembly effect on CeO2-WO3-TiO2 catalysts for selective catalytic reduction of NO with NH3. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110549] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Xu H, Liu J, Zhang Z, Liu S, Lin Q, Wang Y, Dai S, Chen Y. Design and Synthesis of Highly-Dispersed WO3 Catalyst with Highly Effective NH3–SCR Activity for NOx Abatement. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03503] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haidi Xu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, China
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jixing Liu
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Zihao Zhang
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shuang Liu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, China
| | - Qinjing Lin
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yun Wang
- Sinocat Environmental Technology Co. Ltd., Chengdu 611731, China
| | - Sheng Dai
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Yaoqiang Chen
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, China
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23
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Zeng Y, Song W, Wang Y, Meng Y, Song F, Zhang S, Zhong Q. The utilization of dye wastewater in enhancing catalytic activity of CeO 2-TiO 2 mixed oxide catalyst for NO reduction and dichloromethane oxidation. CHEMOSPHERE 2019; 235:1146-1153. [PMID: 31561305 DOI: 10.1016/j.chemosphere.2019.07.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/21/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
Waste is a misplaced resource. Herein, anionic (orange II sodium salt and Ponceau 2R) and cationic (Rhodamine B and Methylene blue) dye wastewater assisted photo-treatment (referred as DAPT) method was developed to modify sol-gel synthesized CeO2-TiO2 (CeTi) mixed oxide catalyst. Catalytic activity test results showed that both anionic and cationic dye wastewater could be used as "fuel" of photo-treatment to enhance the activity of CeTi catalyst in NO reduction and dichloromethane oxidation. Characterization and DFT calculation results revealed that DAPT process increased the amount of Ce3+ ions on CeTi samples, which could induce the formation of Ce-VO-Ti (oxygen vacancy (VO) in Ce-O-Ti short range structure). These Ce-VO-Ti defects not only could be adsorption sites for NH3, dichloromethane and oxygen, but also promoted the redox shift of Ce3++ Ti4+ ⇋ Ce4++ Ti3+ by enhancing the oxidizability of Ce4+ and Ti4+ species. Furthermore, defects changed the polarity of Ce-O and Ti-O, which was conducive to the activation of lattice oxygen. All these improvements contributed to the excellent catalytic activity of CeTi catalysts. We expected this work to be instructive on constructing structure-activity over CeO2-TiO2 based catalysts and utilizing dye wastewater.
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Affiliation(s)
- Yiqing Zeng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Wang Song
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Yanan Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Yahan Meng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Fujiao Song
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, PR China; Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, PR China
| | - Shule Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
| | - Qin Zhong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
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24
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Yu D, Zhong X, Liu D, Liang Y. The effects of Bi 2O 3 on the selective catalytic reduction of NO by propylene over Co 3O 4 nanoplates. RSC Adv 2019; 9:32232-32239. [PMID: 35530767 PMCID: PMC9072850 DOI: 10.1039/c9ra03956b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 09/27/2019] [Indexed: 11/21/2022] Open
Abstract
Bi2O3/Co3O4 catalysts prepared by the impregnation method were investigated for the selective catalytic reduction of NO by C3H6 (C3H6-SCR) in the presence of O2. Their physicochemical properties were analyzed with SEM, XRD, H2-TPR, XPS, PL and IR measurements. It was found that the deposition of Bi2O3 on Co3O4 nanoplates enhanced the catalytic activity, especially at low reaction temperature. The SO2 tolerance of Co3O4 in C3H6-SCR activity was also improved with the addition of Bi2O3. Among all catalysts tested, 10.0 wt% Bi2O3/Co3O4 achieved a 90% NO conversion at 200 °C with the total flow rate of 200 mL min-1 (GHSV 30 000 h-1). No loss in its C3H6-SCR activity was observed at different temperatures after the addition of 100 ppm of SO2 to the reaction mixture. These enhanced catalytic behaviors may be associated with the improved oxidizing characteristics of 10.0 wt% Bi2O3/Co3O2. XRD results showed that Bi2O3 entered the lattice of Co3O4, resulting in the formation of lattice distortion and structural defects. H2-TPR results showed that the reduction of Co3O4 was promoted and the diffusion of oxygen was accelerated with the addition of Bi2O3. XPS measurements implied that more Co3+ formed on the 10.0% Bi2O3/Co3O2 catalysts. The improved oxidizing characteristics of the catalyst with the addition of Bi2O3 due to the synergistic effect of the nanostructure hybrid, thus enhanced the C3H6-SCR reaction and hindered the oxidization of SO2. Therefore, the 10.0% Bi2O3/Co3O4 catalyst exhibited the highest NO conversion and strongest SO2 tolerance ability.
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Affiliation(s)
- Dezhong Yu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology Wuhan 430205 China
| | - Xin Zhong
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology Wuhan 430205 China
| | - Dong Liu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology Wuhan 430205 China
| | - Ying Liang
- School of Chemical Engineering, Hubei University of Arts and Science Xiangyang 441053 China
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25
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Dong F, Han W, Zhao H, Zhang G, Tang Z. Porous hollow CoInOx nanocubes as a highly efficient catalyst for the catalytic combustion of toluene. NANOSCALE 2019; 11:9937-9948. [PMID: 31070199 DOI: 10.1039/c8nr10052g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Porous hollow HC-CoInOx nanocubes were synthesized via a SiO2 template strategy involving a cobalt-based metal-organic framework derived from a Prussian Blue analogue. As a heterogeneous catalytic material for the catalytic combustion of toluene, the hollow HC-CoInOx nanocubes displayed superior catalytic performance (T90 = 178 °C) and greatly reduced the activation energy for toluene oxidation due to their large surface area, the formation of surface dangling bands and oxygen vacancies, and increased number of weak acid sites. In comparison, the C-CoInOx sample (without the introduction of a SiO2 template) required a higher reaction temperature to achieve the same conversion of toluene (T90 = 345 °C). Especially, the insertion and coating of SiO2 in CoIn-PBA nanocubes greatly improves their thermal stability, and the nanocubic shape of the porous hollow HC-CoInOx sample can remain intact after roasting at 450 °C, while the nanocubic shape of the C-CoInOx sample without the introduction of SiO2 is partially damaged and suffers from serious aggregation under the same firing conditions. Simultaneously, the porous hollow HC-CoInOx nanocubes also exhibited excellent cycling and thermal stability for the catalytic combustion of toluene to CO2 and H2O.
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Affiliation(s)
- Fang Dong
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China.
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26
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Mahmoud HR, El-Molla SA, Naghmash MA. Novel mesoporous MnO 2/SnO 2 nanomaterials synthesized by ultrasonic-assisted co-precipitation method and their application in the catalytic decomposition of hydrogen peroxide. ULTRASONICS 2019; 95:95-103. [PMID: 30903814 DOI: 10.1016/j.ultras.2019.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 02/13/2019] [Accepted: 03/13/2019] [Indexed: 06/09/2023]
Abstract
Novel mesoporous MnO2/SnO2 catalysts were successfully synthesized via traditional and ultrasonic co-precipitation methods. Moreover, their catalytic efficiencies were evaluated in decomposition of hydrogen peroxide (H2O2). Interestingly, it was found that the mixing of MnO2 with SnO2 catalyst led to a significant improvement in their catalytic efficiencies compared with single oxides catalysts. However, the influence of ultrasonic power and irradiation time on MnO2/SnO2 nanomaterials were compared to get optimum synthetic condition. Subsequently, the catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption analysis and high-resolution transmission electron microscopy (HR-TEM). Results represented that the effect of ultrasonic power and irradiation time on MnO2/SnO2 catalysts exerted a great influence on the BET surface area and average particle diameter. Furthermore, the results showed that the best catalytic efficiency was obtained for the mesoporous MnO2/SnO2 catalyst which is sonicated at power of 60% for 30 min as optimum conditions. Finally, the outcomes appeared that the catalysts synthesized by ultrasonic co-precipitation method were more efficient than those synthesized by traditional co-precipitation in catalyzing H2O2 decomposition.
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Affiliation(s)
- Hala R Mahmoud
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt.
| | - Sahar A El-Molla
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt
| | - Mona A Naghmash
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt
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27
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Lian Z, Shan W, Wang M, He H, Feng Q. The balance of acidity and redox capability over modified CeO 2 catalyst for the selective catalytic reduction of NO with NH 3. J Environ Sci (China) 2019; 79:273-279. [PMID: 30784451 DOI: 10.1016/j.jes.2018.11.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/21/2018] [Accepted: 11/22/2018] [Indexed: 06/09/2023]
Abstract
The effect of acidity and redox capability over sulfuric acid-modified CeO2 catalysts were studied for the selective catalytic reduction of NOx with NH3 (NH3-SCR). The deposition of sulfate significantly enhanced the catalytic performance over CeO2. NOx conversion over 4H2SO4/CeO2 at 230-440 °C was higher than 90%. The strong redox capability of CeO2 could result in unselective NH3 oxidation and decrease high temperatures catalytic activity and N2 selectivity. The deposition of sulfate increased the acidity and weakened the redox capability, and then increased the high temperature NOx conversion and N2 selectivity. An appropriate level of acidity also promoted the activity at 190-250 °C over ceria-based catalysts, and with further increase in the acidity, the SCR activity decreased slightly. Weak redox capability lowered the low-temperature catalytic activity. Excellent SCR activity requires a balance of acidity and redox capability on the catalysts.
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Affiliation(s)
- Zhihua Lian
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meng Wang
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Qingcai Feng
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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28
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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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29
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Liu S, Sun M, Lin Q, Xu H, Wang J, Chen Y. The promotion effects of TiO
2
on the selective catalytic reduction of NO
x
with NH
3
over ceo
2
‐WO
3
/ZrO
2
: The catalytic performance and reaction route. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Shuang Liu
- College of ChemistrySichuan UniversityChengdu 610064P. R. China
| | - Mengmeng Sun
- Institute of New Energy and Low‐Carbon TechnologySichuan UniversityChengdu 610064P. R. China
| | - Qingjin Lin
- College of ChemistrySichuan UniversityChengdu 610064P. R. China
| | - Haidi Xu
- Institute of New Energy and Low‐Carbon TechnologySichuan UniversityChengdu 610064P. R. China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology CenterChengdu 610064P. R. China
| | - Jianli Wang
- College of ChemistrySichuan UniversityChengdu 610064P. R. China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology CenterChengdu 610064P. R. China
| | - Yaoqiang Chen
- College of ChemistrySichuan UniversityChengdu 610064P. R. China
- Institute of New Energy and Low‐Carbon TechnologySichuan UniversityChengdu 610064P. R. China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology CenterChengdu 610064P. R. China
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30
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Wang D, Zhang C, Xie Y, Pan Z, Xue X, Zhang R. A study on the catalytic oxidation of soot by Sn–Ce composite oxides: adsorbed oxygen and defect sites synergistically enhance catalytic activity. NEW J CHEM 2019. [DOI: 10.1039/c9nj04134f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two reaction paths in the presence of a Sn–Ce catalyst with H2O (path 1) and without H2O (path 2).
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Affiliation(s)
- Dengtai Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Changsen Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Yunyun Xie
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Zeyou Pan
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Xiangfei Xue
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Ruiqin Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
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31
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Shi JW, Wang Y, Duan R, Gao C, Wang B, He C, Niu C. The synergistic effects between Ce and Cu in CuyCe1−yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance. Catal Sci Technol 2019. [DOI: 10.1039/c8cy01949e] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Non-manganese-based metal oxides are promising catalysts for the NH3-SCR (selective catalytic reduction) of NOx at low temperatures.
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Affiliation(s)
- Jian-Wen Shi
- State Key Laboratory of Electrical Insulation and Power Equipment
- Center of Nanomaterials for Renewable Energy
- School of Electrical Engineering
- Xi'an Jiaotong University
- Xi'an 710049
| | - Yao Wang
- State Key Laboratory of Electrical Insulation and Power Equipment
- Center of Nanomaterials for Renewable Energy
- School of Electrical Engineering
- Xi'an Jiaotong University
- Xi'an 710049
| | - Ruibin Duan
- Guangdong Provincial Academy of Building Research Group Co., Ltd
- Guangzhou 510530
- China
| | - Chen Gao
- State Key Laboratory of Electrical Insulation and Power Equipment
- Center of Nanomaterials for Renewable Energy
- School of Electrical Engineering
- Xi'an Jiaotong University
- Xi'an 710049
| | - Baorui Wang
- State Key Laboratory of Electrical Insulation and Power Equipment
- Center of Nanomaterials for Renewable Energy
- School of Electrical Engineering
- Xi'an Jiaotong University
- Xi'an 710049
| | - Chi He
- Department of Environmental Science and Engineering
- School of Energy and Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Chunming Niu
- State Key Laboratory of Electrical Insulation and Power Equipment
- Center of Nanomaterials for Renewable Energy
- School of Electrical Engineering
- Xi'an Jiaotong University
- Xi'an 710049
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32
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Liu H, Sun C, Fan Z, Jia X, Sun J, Gao F, Tang C, Dong L. Doping effect of Sm on the TiO2/CeSmOx catalyst in the NH3-SCR reaction: structure–activity relationship, reaction mechanism and SO2 tolerance. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00731h] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A good balance between the redox properties and surface acidity induces the high activity of the Sm doped TiO2/CeO2 catalyst.
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Affiliation(s)
- Hao Liu
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
| | - Chuanzhi Sun
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
| | - Zhongxuan Fan
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
| | - XuanXuan Jia
- College of Chemistry
- Chemical Engineering and Materials Science
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
- Institute of Materials and Clean Energy
- Shandong Normal University
| | - Jingfang Sun
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
| | - Fei Gao
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
| | - Changjin Tang
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
| | - Lin Dong
- School of the Environment
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
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33
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Wang Y, Kang Y, Ge M, Xiu Zhang, Zhan L. Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH 3 at low temperatures. RSC Adv 2018; 8:36383-36391. [PMID: 35558442 PMCID: PMC9088850 DOI: 10.1039/c8ra05151h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 10/18/2018] [Indexed: 12/23/2022] Open
Abstract
A series of cerium and tin oxides anchored on reduced graphene oxide (CeO2-SnO x /rGO) catalysts are synthesized using a hydrothermal method and their catalytic activities are investigated by selective catalytic reduction (SCR) of NO with NH3 in the temperature range of 120-280 °C. The results indicate that the CeO2-SnO x /rGO catalyst shows high SCR activity and high selectivity to N2 in the temperature range of 120-280 °C. The catalyst with a mass ratio of (Ce + Sn)/GO = 3.9 exhibits NO conversion of about 86% at 160 °C, above 97% NO conversion at temperatures of 200-280 °C and higher than 95% N2 selectivity at 120-280 °C. In addition, the catalyst presents a certain SO2 resistance. It is found that the highly dispersed CeO2 nanoparticles are deposited on the surface of rGO nanosheets, because of the incorporation of Sn4+ into the lattice of CeO2. The mesoporous structures of the CeO2-SnO x /rGO catalyst provides a large specific surface area and more active sites for facilitating the adsorption of reactant species, leading to high SCR activity. More importantly, the synergistic interaction between cerium and tin oxides is responsible for the excellent SCR activity, which results in a higher ratio of Ce3+/(Ce3+ + Ce4+), higher concentrations of surface chemisorbed oxygen and oxygen vacancies, more strong acid sites and stronger acid strength on the surface of the CeSn(3.9)/rGO catalyst.
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Affiliation(s)
- Yanli Wang
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914
| | - Ying Kang
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914
| | - Meng Ge
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914
| | - Xiu Zhang
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914
| | - Liang Zhan
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914
- CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001 China
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34
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Zeng Y, Wang Y, Zhang S, Zhong Q. A study on the NH 3-SCR performance and reaction mechanism of a cost-effective and environment-friendly black TiO 2 catalyst. Phys Chem Chem Phys 2018; 20:22744-22752. [PMID: 30140807 DOI: 10.1039/c8cp02270d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, black TiO2 without adding active components was developed for NH3-SCR-DeNOx. The catalytic activity tests showed that the NO removal efficiency of black TiO2 was always greater than 90% at 330-390 °C, which almost reached that of the commercial NH3-SCR-DeNOx catalyst. XRD, UV-vis, TG, EPR, XPS, H2-TPR, DFT and NH3-TPD analyses were carried out to study the structure-effectiveness relationship. We found that a large number of oxygen vacancies were formed over the black TiO2 surface. It was not only promoted the adsorption of NH3via direct (oxygen vacancies as Lewis acid sites for NH3 adsorption) and indirect (oxygen vacancies promote the formation of surface hydroxyl groups, which are Brønsted acid sites for NH3 adsorption) forms, but also improved the redox properties by promoting the reduction of Ti4+ to Ti3+. These changes lead to the superior catalytic activity of black TiO2 for NH3-SCR-DeNOx. Additionally, an in situ DRIFT study demonstrated that the NH3-SCR-DeNOx reaction over black TiO2 occurred via the Eley-Rideal (E-R) mechanism. Finally, the catalytic stability and resistance to H2O and SO2 of the black TiO2 catalyst were studied, and it showed good performances. This study offered new and important insights into the understanding of the role of oxygen vacancies in determining the physical and chemical properties of catalysts.
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Affiliation(s)
- Yiqing Zeng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
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35
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Mu J, Li X, Sun W, Fan S, Wang X, Wang L, Qin M, Gan G, Yin Z, Zhang D. Enhancement of Low-Temperature Catalytic Activity over a Highly Dispersed Fe–Mn/Ti Catalyst for Selective Catalytic Reduction of NOx with NH3. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01335] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jincheng Mu
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xinyong Li
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Wenbo Sun
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shiying Fan
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xinyang Wang
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Liang Wang
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Meichun Qin
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Guoqiang Gan
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Zhifan Yin
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Dongke Zhang
- Centre for Energy (M473), The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
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36
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You Y, Shi C, Chang H, Guo L, Xu L, Li J. The promoting effects of amorphous CePO 4 species on phosphorus-doped CeO 2 /TiO 2 catalysts for selective catalytic reduction of NO x by NH 3. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.04.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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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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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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39
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Zhang L, Sun J, Li L, Ran S, Li G, Li C, Ge C, Dong L. Selective Catalytic Reduction of NO by NH3 on CeO2–MOx (M = Ti, Si, and Al) Dual Composite Catalysts: Impact of Surface Acidity. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b03652] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [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
| | - Jingfang Sun
- Key
Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, 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
| | - Shumin Ran
- School
of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, People’s Republic of China
| | - Genxiang 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
| | - Chengyan Ge
- School
of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, 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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40
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Huang X, Zhang G, Dong F, Tang Z. The remarkable promotional effect of Sn on CeVO4 catalyst for wide temperature NH3-SCR process by citric acid-assisted solvothermal synthesis and post-hydrothermal treatment. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01841c] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of CeVO4 catalysts were prepared by citric acid-assisted solvothermal synthesis and hydrothermal methods.
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Affiliation(s)
- Xiaosheng Huang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou 730000
- PR China
| | - Guodong Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou 730000
- PR China
| | - Fang Dong
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou 730000
- PR China
| | - Zhicheng Tang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
- Lanzhou 730000
- PR China
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41
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Yang L, You X, Sheng Z, Ma D, Yu D, Xiao X, Wang S. The promoting effect of noble metal (Rh, Ru, Pt, Pd) doping on the performances of MnOx–CeO2/graphene catalysts for the selective catalytic reduction of NO with NH3at low temperatures. NEW J CHEM 2018. [DOI: 10.1039/c8nj01417e] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rh, Ru, Pt or Pd doping on MnOx–CeO2/graphene catalysts increased the amount of chemisorbed oxygen and surface acid sites.
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Affiliation(s)
- Liu Yang
- School of Environment
- Nanjing Normal University
- Nanjing 210023
- China
| | - Xiaochen You
- School of Environment
- Nanjing Normal University
- Nanjing 210023
- China
| | - Zhongyi Sheng
- School of Environment
- Nanjing Normal University
- Nanjing 210023
- China
- Suzhou Industrial Technology Research Institute of Zhejiang University
| | - Dingren Ma
- School of Environment
- Nanjing Normal University
- Nanjing 210023
- China
| | - Danqing Yu
- School of Chemical Engineering and Technology
- Wuhan University of Science and Technology
- Wuhan 430081
- China
| | - Xiang Xiao
- Suzhou Industrial Technology Research Institute of Zhejiang University
- Suzhou 215163
- China
| | - Sheng Wang
- State Power Environmental Protection Research Institute
- Nanjing 210031
- China
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42
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Zhao P, Feng N, Fang F, Liu G, Chen L, Meng J, Chen C, Wang L, Wan H, Guan G. Facile synthesis of three-dimensional ordered macroporous Sr1−xKxTiO3 perovskites with enhanced catalytic activity for soot combustion. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01498a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The appropriate incorporation of potassium into 3DOM SrTiO3 perovskites effectively improved the catalytic performance for soot combustion.
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43
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Effect of Ce doping into V 2 O 5 -WO 3 /TiO 2 catalysts on the selective catalytic reduction of NO x by NH 3. J RARE EARTH 2017. [DOI: 10.1016/j.jre.2017.06.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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44
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Sun J, Lu Y, Zhang L, Ge C, Tang C, Wan H, Dong L. Comparative Study of Different Doped Metal Cations on the Reduction, Acidity, and Activity of Fe9M1Ox (M = Ti4+, Ce4+/3+, Al3+) Catalysts for NH3-SCR Reaction. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b03080] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jingfang Sun
- Jiangsu
Key Laboratory of Vehicle Emissions Control, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Yiyang Lu
- Jiangsu
Key Laboratory of Vehicle Emissions Control, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Lei Zhang
- School
of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404001, PR China
| | - Chengyan Ge
- School
of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Changjin Tang
- Jiangsu
Key Laboratory of Vehicle Emissions Control, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Haiqin Wan
- State
Key Labrotary of Pollution Control and Resource Reuse, School of the
Environment, Nanjing University, Nanjing 210093, PR China
| | - Lin Dong
- Jiangsu
Key Laboratory of Vehicle Emissions Control, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, PR China
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45
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Zhang L, Sun J, Xiong Y, Zeng X, Tang C, Dong L. Catalytic performance of highly dispersed WO 3 loaded on CeO 2 in the selective catalytic reduction of NO by NH 3. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(17)62887-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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46
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Li L, Sun B, Sun J, Yu S, Ge C, Tang C, Dong L. Novel MnO -CeO2 nanosphere catalyst for low-temperature NH3-SCR. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.06.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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47
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Zeng Y, Jiang D, Wang Y, Zhang S, Zhong Q. The inhibition effect of oxygen in the calcination atmosphere on the catalytic performance of MnOx–CeO2 catalysts for NO oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1234-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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Zeng Y, Zhang S, Wang Y, Zhong Q. CeO2 supported on reduced TiO2 for selective catalytic reduction of NO by NH3. J Colloid Interface Sci 2017; 496:487-495. [DOI: 10.1016/j.jcis.2017.02.050] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/21/2017] [Accepted: 02/21/2017] [Indexed: 11/27/2022]
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49
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Zhu L, Zeng Y, Zhang S, Deng J, Zhong Q. Effects of synthesis methods on catalytic activities of CoO x-TiO 2 for low-temperature NH 3-SCR of NO. J Environ Sci (China) 2017; 54:277-287. [PMID: 28391939 DOI: 10.1016/j.jes.2016.09.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 07/22/2016] [Accepted: 09/14/2016] [Indexed: 05/20/2023]
Abstract
A series of cobalt doped TiO2 (Co-TiO2) and CoOx loaded TiO2 (Co/TiO2) catalysts prepared by sol-gel and impregnation methods respectively were investigated on selective catalytic reduction with NH3 (NH3-SCR) of NO. It was found that Co-TiO2 catalyst showed more preferable catalytic activity at low temperature range. From characterization results of XRD, TEM, Raman and FT-IR, Co species were proved to be doped into TiO2 lattice by replaced Ti atoms. After being characterized and analyzed by NH3-TPD, PL, XPS, EPR and DRIFTS, it was found that the better NH3-SCR activities of Co-TiO2 catalysts, compared with Co/TiO2 catalyst, were ascribed to the formation of more oxygen vacancies which further promoted the production of more superoxide ions (O2-). The superoxide ions were crucial for the formation of low temperature SCR reaction intermediates (NO3-) by reacting with adsorbed NO molecule. Therefore, these aspects were responsible for the higher low temperature NH3-SCR activity of Co-TiO2 catalysts.
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Affiliation(s)
- Li Zhu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yiqing Zeng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Shule Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Jinli Deng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Qin Zhong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
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50
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Yan L, Liu Y, Zha K, Li H, Shi L, Zhang D. Deep insight into the structure–activity relationship of Nb modified SnO2–CeO2 catalysts for low-temperature selective catalytic reduction of NO by NH3. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02242a] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure–activity relationship of Nb modified SnO2–CeO2 catalysts was investigated for selective catalytic reduction of NO by NH3.
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Affiliation(s)
- Lijun Yan
- Research Center of Nano Science and Technology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
| | - Yangyang Liu
- Research Center of Nano Science and Technology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
| | - Kaiwen Zha
- Research Center of Nano Science and Technology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
| | - Hongrui Li
- Research Center of Nano Science and Technology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
| | - Liyi Shi
- Research Center of Nano Science and Technology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
| | - Dengsong Zhang
- Research Center of Nano Science and Technology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
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