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Larki I, Zahedi A, Asadi M, Forootan MM, Farajollahi M, Ahmadi R, Ahmadi A. Mitigation approaches and techniques for combustion power plants flue gas emissions: A comprehensive review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166108. [PMID: 37567281 DOI: 10.1016/j.scitotenv.2023.166108] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/29/2023] [Accepted: 08/05/2023] [Indexed: 08/13/2023]
Abstract
Population growth and urbanization are driving energy demand. Despite the development of renewable energy technologies, most of this demand is still met by fossil fuels. Flue gases are the main air pollutants from combustion power plants. These pollutants include particulate matter (PM), sulfur oxides (SOx), nitrogen oxides (NOx), and carbon oxides (COx). The release of these pollutants has adverse effects on human health and the environment, including serious damage to the human respiratory system, acid rain, climate change, and global warming. In this review, a wide range of conventional and new technologies that have the potential to be used in the combustion power plant sector to manage and reduce flue gas pollutants have been examined. Nowadays, conventional approaches to emissions control and management, which focus primarily on post-combustion techniques, face several challenges despite their widespread use and commendable effectiveness. Therefore, studies that have proposed alternative approaches to achieve improved and more efficient methods are reviewed. The results show that new advances such as novel PM collectors, attaining an efficiency of nearly 100 % for submicron particles, microwave systems, boasting an efficiency of nearly 90 % for NO and over 95 % for SO2, electrochemical systems achieving above 90 % efficiency for NOx reduction, non-thermal plasma processes demonstrating an efficiency close to 90 % for NOx, microalgae-based methods with efficiency ranging from 80 % to 99 % for CO2, and wet scrubbing, exhibit considerable potential in addressing the shortcomings of conventional systems. Furthermore, the integration of hybrid methods, particularly in regions prioritizing environmental concerns over economic considerations, holds promise for enhanced control and removal of flue gas pollutants with superior efficiency.
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Affiliation(s)
- Iman Larki
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran
| | - Alireza Zahedi
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran.
| | - Mahdi Asadi
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran
| | - Mohammad Mahdi Forootan
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran
| | - Meisam Farajollahi
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran
| | - Rouhollah Ahmadi
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran
| | - Abolfazl Ahmadi
- Department of Energy Systems Engineering, School of Advanced Technologies, Iran University of Science and Technology, Tehran, Iran
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Zakharchuk K, Kovalevsky A, Yaremchenko A. Characterization of Ruddlesden-Popper La 2-xBa xNiO 4±δ Nickelates as Potential Electrocatalysts for Solid Oxide Cells. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1755. [PMID: 36837385 PMCID: PMC9965424 DOI: 10.3390/ma16041755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Ruddlesden-Popper La2-xBaxNiO4±δ (x = 0-1.1) nickelates were prepared by a glycine-nitrate combustion route combined with high-temperature processing and evaluated for potential application as electrocatalysts for solid oxide cells and electrochemical NOx elimination. The characterization included structural, microstructural and dilatometric studies, determination of oxygen nonstoichiometry, measurements of electrical conductivity and oxygen permeability, and assessment of chemical compatibility with other materials. The formation range of phase-pure solid solutions was found to be limited to x = 0.5. Exceeding this limit leads to the co-existence of the main nickelate phase with low-melting Ba- and Ni-based secondary phases responsible for a strong reactivity with Pt components in experimental cells. Acceptor-type substitution of lanthanum by barium in La2-xBaxNiO4+δ is charge-compensated by decreasing oxygen excess, from δ ≈ 0.1 for x = 0 to nearly oxygen-stoichiometric state for x = 0.5 at 800 °C in air, and generation of electron-holes (formation of Ni3+). This leads to an increase in p-type electronic conductivity (up to ~80 S/cm for highly porous La1.5Ba0.5NiO4+δ ceramics at 450-900 °C) and a decline of oxygen-ionic transport. La2-xBaxNiO4+δ (x = 0-0.5) ceramics exhibit moderate thermal expansion coefficients, 13.8-14.3 ppm/K at 25-1000 °C in air. These ceramic materials react with yttria-stabilized zirconia at 700 °C with the formation of an insulating La2Zr2O7 phase but show good chemical compatibility with BaZr0.85Y0.15O3-δ solid electrolyte.
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Gong J, Shi H, Yu Y, Yue Z, Wang Y, Tan W. Restrictions of nitric oxide electrocatalytic decomposition over perovskite cathode in presence of oxygen: Oxygen surface exchange and diffusion. J Colloid Interface Sci 2022; 628:95-105. [PMID: 35985066 DOI: 10.1016/j.jcis.2022.08.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/13/2022] [Accepted: 08/04/2022] [Indexed: 10/15/2022]
Abstract
Nitric oxide (NO) abatement from engine exhaust is of great significance to alleviate air pollution and haze. Compared with the traditional selective catalytic reduction (SCR) technology, electrocatalytic decomposition of NO simplifies the reductant supply system and therefore avoids secondary pollution. In this study, typical perovskite La0.6Sr0.4CoxFe1-xO3-δ (LSCF) infiltrated by different dosages of nano ceria Ce0.9Gd0.1O1.9 (GDC) was used as composite cathodes, in order to explore the critical factors to restrain NO conversion in excess of O2. The results show that electron as reactive species transfers among NO, ABO3-type cathode and oxygen vacancy. The maximum of NO removal efficiency can reach 96.27 % in absence of O2 and up to 80.55 % in presence of 1% O2 in case of LSCF infiltrated by moderate dosages LSCF-GDC(2), which is superior to those of LSCF, LSCF-GDC(4) and LSM-GDC(nano) composite cathode. Compared to oxygen storage capacity (OSC) caused by the infiltration of nano ceria, higher surface oxygen exchange coefficient (kδ) and chemical diffusion coefficient (Dchem) lead to the significant decrease in polarization resistance (Rp), and consequently to the enhancement of NO removal in presence of O2. No matter what kind of oxygen deriving from oxygen reduction reaction (ORR) and NO reduction reaction (NORR), GDC infiltration into LSCF improves oxygen transport property and however, the property of cathode in ORR is dominant over in NORR in presence of O2. Moderate GDC loading has the highest oxygen transport kinetics, and oxygen surface exchange is faster than chemical diffusion, due to lower activation energy. Over loading of GDC with greater ohmic resistance (Rs) inversely influences the NO removal.
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Affiliation(s)
- Junda Gong
- International Joint Laboratory of Green & Low Carbon Development, Jiangsu Province, China
| | - Huangang Shi
- International Joint Laboratory of Green & Low Carbon Development, Jiangsu Province, China; Department of Environment Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China
| | - Yang Yu
- International Joint Laboratory of Green & Low Carbon Development, Jiangsu Province, China; Department of Environment Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China
| | - Zhihao Yue
- Department of Environment Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China
| | - Yating Wang
- Department of Environment Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China
| | - Wenyi Tan
- International Joint Laboratory of Green & Low Carbon Development, Jiangsu Province, China; Department of Environment Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China.
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Li W, Liang K, Wang J, Wen J, Shi J, Zhang Z, Jiang W, Zhang R, Yu H. Effects of Cu doping on electrochemical NO x removal by La 0.8Sr 0.2MnO 3 perovskites. ENVIRONMENTAL RESEARCH 2022; 210:112955. [PMID: 35182592 DOI: 10.1016/j.envres.2022.112955] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/07/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Electrochemical removal of nitrogen oxides (NOx) by perovskite electrodes is a promising method due to its low cost, simple operation and no secondary pollution. In this study, a series of La0.8Sr0.2Mn1-xCuxO3 (x = 0, 0.05, 0.1 and 0.15) perovskites are fabricated as the improved electrodes of solid electrolyte cells (SECs) for NOx removal and the effects of Cu doping are investigated systematacially. Multiple characterization methods are carried out to analyze the physicochemical properties of perovskites firstly. Then the performances of cells based on various perovskites are evaluated by the measurements of electrochemical properties and NOx conversions. The results show that the Cu-doped electrode has more surface oxygen vacancies and a better redox property, thus having a higher NOx conversion and smaller polarization resistance. The electrode based on La0.8Sr0.2Mn0.9Cu0.1O3 has the maximum 70.8% NOx conversion and the lowest 36.3 Ω cm2 Rp value in the atmosphere of 1000 ppm NO at 700 °C. First-principle calculation reveals that the Cu-doped electrode is easier to form surface oxygen vacancy, while the surface oxygen vacancy plays an important role on electron transfer between electrode and NOx molecule. This study not only provides a new strategy to enhance the electrode performance for NOx removal in SECs but reveals the fundamental effect of Cu doping on the properties of La0.8Sr0.2MnO3 perovskites.
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Affiliation(s)
- Wenjie Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China; Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, PR China.
| | - Ke Liang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Jiabin Wang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China; Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, PR China
| | - Junhui Wen
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China; Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, PR China
| | - Jingyi Shi
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Zhenzong Zhang
- College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Wei Jiang
- Engineering Technology Research Institute, China Construction Third Engineering Bureau Co.Ltd., Wuhan, 430100, PR China
| | - Ruiqin Zhang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China; Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, PR China
| | - Honbing Yu
- College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
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Li W, Yu H, Zhang Z, Hei W, Liang K, Yu H. Electrochemical removal of NO x by La 0.8Sr 0.2Mn 1-xNi xO 3 electrodes in solid electrolyte cells: Role of Ni substitution. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126640. [PMID: 34329099 DOI: 10.1016/j.jhazmat.2021.126640] [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: 04/22/2021] [Revised: 06/29/2021] [Accepted: 07/11/2021] [Indexed: 06/13/2023]
Abstract
Electrochemical removal of nitrogen oxides (NOx) by solid electrolyte cells (SECs) is a promising technology due to no required reductant. Herein, a series of La0.8Sr0.2Mn1-xNixO3 (0 ≤ x ≤ 0.5) perovskites were first synthesized and utilized as the electrode materials of SECs. The role of Ni substitution in electrode performance and NOx reduction mechanism were revealed by various experimental characterization and first-principle calculations. The results indicate that the moderate Ni substitution (x ≤ 0.3) increased the NOx conversion of electrodes while reduced the polarization resistance. The further investigation shows that this improvement was attributed to the more surface oxygen vacancies, better reducibility and higher Mn4+ proportion of the Ni-substituted perovskites. The electrochemical impedance spectroscopy (EIS) shows that these changes facilitated the NOx adsorption and dissociation processes on the electrode. According to first-principle calculations, the Ni-substituted perovskite had a lower formation energy of surface oxygen vacancy, while the NO molecule adsorbed on defect surface gained more electrons thus was easier to be reduced and dissociated. Finally, the electrode performance at different operating temperatures and the operational stability were verified.
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Affiliation(s)
- Wenjie Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.
| | - Han Yu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China; Lund University, Lund 22100, Sweden.
| | - Zhenzong Zhang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Wanting Hei
- Institute of Environmental Science, College of Chemistry, Zhengzhou University, Zhengzhou 450001, PR China
| | - Ke Liang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China
| | - Hongbing Yu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.
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Qu G, Li Z, Xie R, Ning P, Ma X, Fen T, Zhao C. Simultaneous desulfurization and denitrification by electrodialysis. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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An insight into the electrocatalytic properties of porous La0.3Sr0.7Fe0.7Cr0.3O3−δ electrodes towards oxygen reduction reaction. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04875-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shao J, Tao Y, Hansen KK. Highly selective NO x reduction for diesel engine exhaust via an electrochemical system. Electrochem commun 2016. [DOI: 10.1016/j.elecom.2016.08.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Theoretical modeling of NO electrochemical reduction on multifunctional layer electrode by alternating/direct current electrolysis. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Recent developments of electrochemical promotion of catalysis in the techniques of DeNOx. ScientificWorldJournal 2013; 2013:463160. [PMID: 23970835 PMCID: PMC3730159 DOI: 10.1155/2013/463160] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 06/19/2013] [Indexed: 11/24/2022] Open
Abstract
Electrochemical promotion of catalysis reactions (EPOC) is one of the most significant discoveries in the field of catalytic and environmental protection. The work presented in this paper focuses on the aspects of reaction mechanism, influencing factors, and recent positive results. It has been shown with more than 80 different catalytic systems that the catalytic activity and selectivity of conductive catalysts deposited on solid electrolytes can be altered in the last 30 years. The active ingredient of catalyst can be activated by applying constant voltage or constant current to the catalysts/electrolyte interface. The effect of EPOC can improve greatly the conversion rate of NOx. And it can also improve the lifetime of catalyst by inhibiting its poisoning.
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