1
|
Bhaskaran A, Sharma D, Roy S, Singh SA. Technological solutions for NO x, SO x, and VOC abatement: recent breakthroughs and future directions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:91501-91533. [PMID: 37495811 DOI: 10.1007/s11356-023-28840-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/13/2023] [Indexed: 07/28/2023]
Abstract
NOx, SOx, and carbonaceous volatile organic compounds (VOCs) are extremely harmful to the environment, and their concentrations must be within the limits prescribed by the region-specific pollution control boards. Thus, NOx, SOx, and VOC abatement is essential to safeguard the environment. Considering the importance of NOx, SOx, and VOC abatement, the discussion on selective catalytic reduction, oxidation, redox methods, and adsorption using noble metal and non-noble metal-based catalytic approaches were elaborated. This article covers different thermal treatment techniques, category of materials as catalysts, and its structure-property insights along with the advanced oxidation processes and adsorption. The defect engineered catalysts with lattice oxygen vacancies, bi- and tri-metallic noble metal catalysts and non-noble metal catalysts, modified metal organic frameworks, mixed-metal oxide supports, and their mechanisms have been thoroughly reviewed. The main hurdles and potential achievements in developing novel simultaneous NOx, SOx, and VOC removal technologies are critically discussed to envisage the future directions. This review highlights the removal of NOx, SOx, and VOC through material selection, properties, and mechanisms to further improve the existing abatement methods in an efficient way.
Collapse
Affiliation(s)
- Aathira Bhaskaran
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, 500078, India
| | - Deepika Sharma
- Department of Chemical Engineering, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, 333031, India
| | - Sounak Roy
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, 500078, India
- Materials Center for Sustainable Energy & Environment, Birla Institute of Technology and Science Pilani Hyderabad Campus, Hyderabad, 500078, India
| | - Satyapaul A Singh
- Materials Center for Sustainable Energy & Environment, Birla Institute of Technology and Science Pilani Hyderabad Campus, Hyderabad, 500078, India.
- Department of Chemical Engineering, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, 500078, India.
| |
Collapse
|
2
|
Synergistic effect of Fe and Ce on Fe doped CeO2 for catalytic ozonation of amoxicillin: Efficiency evaluation and mechanism study. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
|
3
|
Zhang Q, Guo F, Yu L, Wang B, Ding J, Fan L, Wu Y, Yang B, Xu Q. Efficient Degradation of Toluene over MnO 2/TiO 2 Nanobelts under Vacuum Ultraviolet Irradiation. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Qi Zhang
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| | - Fang Guo
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| | - Liangyun Yu
- School of Light Industry, Beijing Technology and Business University, No. 11 Fucheng Road, Beijing100048, P. R. China
| | - Bailin Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| | - Jingya Ding
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| | - Lan Fan
- Yancheng Lanfeng Environmental Engineering Technology Co, Ltd, Yancheng224051, P. R. China
| | - Yifan Wu
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| | - Bairen Yang
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| | - Qi Xu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng224051, P. R. China
| |
Collapse
|
4
|
Catalytic Oxidation of NO by Ozone over Mn-Ce/Al2O3/TiO2 Catalyst. Processes (Basel) 2022. [DOI: 10.3390/pr10101946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this study, Mn-Ce/Al2O3/TiO2 catalyst prepared by impregnation method was used for synergistic O3 oxidation NO. The catalyst prepared by impregnating Al2O3/TiO2 at a Mn:Ce molar ratio of 4:1 showed the best catalytic activity. The catalyst performance showed that when the molar ratio of Mn:Ce was 4:1 and the volume ratio of O3:NO was 1:4, the removal rate of NO could reach 63%, which could increase the removal rate by 40% compared with that of NO oxidized by O3 alone. BET, XRD, and TEM characterization results showed that when the molar ratio of Mn:Ce was 4:1, the catalyst specific surface area, and pore capacity were the largest. A large amount of MnOx and CeOx were distributed on the catalyst surface. The XPS analysis showed that the oxidation-reduction and oxygen vacancy of Mn (IV)/Mn (III)/Mn (II) and Ce (IV)/Ce (III), had a synergistic effect on the decomposition of O3 into reactive oxygen species(O*), thus improving the catalytic capacity of Mn-Ce/Al2O3/TiO2 catalyst for O3. The O2-TPD analysis showed that the oxygen vacancies and oxygen species in the catalyst could be used as the active point of decomposition of O3 into O*. The experimental results show that the prepared catalyst can significantly improve the efficiency of ozone oxidation of NO and reduce the amount of ozone. The catalyst can be applied to ozone oxidation denitrification technology.
Collapse
|
5
|
Recent Advances in MnOx/CeO2-Based Ternary Composites for Selective Catalytic Reduction of NOx by NH3: A Review. Catalysts 2021. [DOI: 10.3390/catal11121519] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Recently, manganese oxides (MnOx)/cerium(IV) oxide (CeO2) composites have attracted widespread attention for the selective catalytic reduction (SCR) of nitrogen oxides (NOx) with ammonia (NH3), which exhibit outstanding catalytic performance owing to unique features, such as a large oxygen storage capacity, excellent low-temperature activity, and strong mechanical strength. The intimate contact between the components can effectively accelerate the charge transfer to enhance the electron–hole separation efficiency. Nevertheless, MnOx/CeO2 still reveals some deficiencies in the practical application process because of poor thermal stability, and a low reduction efficiency. Constructing MnOx/CeO2 with other semiconductors is the most effective strategy to further improve catalytic performance. In this article, we discuss progress in the field of MnOx/CeO2-based ternary composites with an emphasis on the SCR of NOx by NH3. Recent progress in their fabrication and application, including suitable examples from the relevant literature, are analyzed and summarized. In addition, the interaction mechanisms between MnOx/CeO2 catalysts and NOx pollutants are comprehensively dissected. Finally, the review provides basic insights into prospects and challenges for the advancement of MnOx/CeO2-based ternary catalysts.
Collapse
|
6
|
Xiong P, Fan S, Song J, Dai Q. Mechanism of catalytic ozonation for elimination of methyldopa with Fe 3 O 4 @SiO 2 @CeO 2 catalyst. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:2903-2913. [PMID: 34363642 DOI: 10.1002/wer.1622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 07/06/2021] [Accepted: 07/11/2021] [Indexed: 06/13/2023]
Abstract
In this study, a magnetic nanocatalyst (Fe3 O4 @SiO2 @CeO2 ) was prepared and applied in the catalytic ozonation of methyldopa (MD). The effects of operational parameters on catalytic ozonation performance were investigated, including ozone dosage, catalyst dosage, initial MD concentration, and pH. The removal of MD was 45.2% in ozonation, whereas the efficiency was achieved to 83.0% with the addition of Fe3 O4 @SiO2 @CeO2 . The results showed that Fe3 O4 @SiO2 @CeO2 could significantly improve the catalytic ozonation performance. And the enhanced mechanism study showed that it was attributed to promotion of ozone decomposition to generate hydroxyl radical. The reaction model was explored, and the reaction rates were calculated for the MD degradation in catalytic ozonation. A higher degradation efficiency of MD in catalytic ozonation was attributed to the enhanced surface effect of the catalysts, which was confirmed by using TBA, PO4 3- , and p-BQ as scavengers of hydroxyl radical, surface reaction, and superoxide radical. The hydroxyl radical and superoxide radical played an important role in the degradation of MD. The mechanism of catalytic ozonation by Fe3 O4 @SiO2 @CeO2 was discussed via X-ray photoelectron spectroscopy (XPS) spectra and experimental data.
Collapse
Affiliation(s)
- Pan Xiong
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Siqi Fan
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Jinshan Song
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Qizhou Dai
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| |
Collapse
|
7
|
Lei Z, Hao S, Yang J, Zhang L, Fang B, Wei K, Lingbo Q, Jin S, Wei C. Study on denitration and sulfur removal performance of Mn-Ce supported fly ash catalyst. CHEMOSPHERE 2021; 270:128646. [PMID: 33127116 DOI: 10.1016/j.chemosphere.2020.128646] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/04/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
Nitrogen oxides (NOx) are the main pollutants of air, which mainly come from the combustion of coal and fossil fuels. In this paper, with fly ash used as the catalyst carrier, the effects on the denitration and sulfur resistance of Mn-Ce loading sequence and molar ratio were studied. The catalyst was characterized and analyzed by XRD, XPS, SEM. The results show that when Mn-Ce bimetal is loaded at the same time, Mn ions enter the CeO2 lattice to form a solid solution of Mn-O-Ce fluorite structure, which makes the catalyst has the best denitration and sulfur resistance. The catalyst denitration performance increases first and then decreases with the increase of Mn-Ce molar ratio. When Mn-Ce is 1:1, the denitration efficiency is higher, the total conversion rate of NO is the highest and the deactivation time is the longest, the catalyst is resistant to sulfur performance is also the best.
Collapse
Affiliation(s)
- Zhang Lei
- Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an University of Science and Technology, Xi'an, 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi'an, 710021, China.
| | - Shu Hao
- Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an University of Science and Technology, Xi'an, 710054, China; Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, 710048, China
| | - Jia Yang
- Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, 710048, China
| | - Lei Zhang
- China National Heavy Machinery Research Institute co, Ltd, Xi'an, 710032, China
| | - Bai Fang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Kuang Wei
- Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Qi Lingbo
- Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Shang Jin
- Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Chao Wei
- Shenmu Hongliulin Coal Mine of Shaanxi Coal Industry Co., Ltd., Shenmu, 719300, China
| |
Collapse
|
8
|
Sudarsanam P, Köckritz A, Atia H, Amin MH, Brückner A. Synergistic Nanostructured MnO
x
/TiO
2
Catalyst for Highly Selective Synthesis of Aromatic Imines. ChemCatChem 2021. [DOI: 10.1002/cctc.202001870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Putla Sudarsanam
- Leibniz Institute for Catalysis e.V. (LIKAT) Albert-Einstein-Str. 29a 18059 Rostock Germany
- Catalysis and Inorganic Chemistry Division CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 India
| | - Angela Köckritz
- Leibniz Institute for Catalysis e.V. (LIKAT) Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Hanan Atia
- Leibniz Institute for Catalysis e.V. (LIKAT) Albert-Einstein-Str. 29a 18059 Rostock Germany
| | | | - Angelika Brückner
- Leibniz Institute for Catalysis e.V. (LIKAT) Albert-Einstein-Str. 29a 18059 Rostock Germany
| |
Collapse
|
9
|
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.
Collapse
Affiliation(s)
- Guiying Xu
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
| | | | | | | | | |
Collapse
|