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Matyakubov N, Nguyen DB, Saud S, Mok YS. Enhancing the Selective Catalytic Reduction of NO x at Low Temperature by Pretreatment of Hydrocarbons in a Gliding Arc Plasma. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00025] [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]
Affiliation(s)
- Nosir Matyakubov
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Duc Ba Nguyen
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
- Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
| | - Shirjana Saud
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Young Sun Mok
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
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Nguyen DB, Matyakubov N, Saud S, Heo I, Kim SJ, Kim YJ, Lee JH, Mok YS. High-Throughput NO x Removal by Two-Stage Plasma Honeycomb Monolith Catalyst. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:6386-6396. [PMID: 33787245 DOI: 10.1021/acs.est.1c00750] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A two-stage plasma catalyst system for high-throughput NOx removal was investigated. Herein, the plasma stage involved the large-volume plasma discharge of humidified gas and was carried out in a sandwich-type honeycomb monolith reactor consisting of a commercial honeycomb catalyst (50 mm high; 93 mm in diameter) located between two parallel perforated disks that formed the electrodes. The results demonstrated that, in the plasma stage, the reduction of NOx did not occur at room temperature; instead, NO was only oxidized to NO2 and n-heptane to oxygenated hydrocarbons. The oxidation of NO and n-heptane in the honeycomb plasma discharge state was largely affected by the humidity of the feed gas. Furthermore, the oxidation of NO to NO2 occurs preferably to that of n-heptane with a tendency of the NO oxidation to decrease with increasing feed gas humidity. The reason is that the generation of O3 decreases as the amount of water vapor in the feed gas increases. Compared to the catalyst alone, the two-stage plasma catalyst system increased NOx removal by 29% at a temperature of 200 °C and an energy density of 25 J/L.
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Affiliation(s)
- Duc Ba Nguyen
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
- Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
| | - Nosir Matyakubov
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Shirjana Saud
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Iljeong Heo
- Environment & Sustainable Resources Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Sang-Joon Kim
- Environment & Sustainable Resources Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Young Jin Kim
- Environment & Sustainable Resources Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Jin Hee Lee
- Environment & Sustainable Resources Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Young Sun Mok
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
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Gholami F, Tomas M, Gholami Z, Vakili M. Technologies for the nitrogen oxides reduction from flue gas: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 714:136712. [PMID: 31991274 DOI: 10.1016/j.scitotenv.2020.136712] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/03/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
The required energy of the global industry is mostly generated from fossil fuel sources, such as natural gas, gasoline, diesel, oil, and coal. Nitrogen oxides are one of the main air pollutants that are produced from the combustion of fossil fuels in stationary and mobile sources. Development of new technologies to decrease the NOx emission from exhaust gases is essential due to the harmful effect of NOx on the environment and human health. Compared with pre-combustion and combustion methods (with <50% NOx removal efficiency), the post-combustion methods with higher efficiency (above 80%) have attracted more attention in NOx elimination. This review describes the currently used technologies of NOx abatement. Different available post-combustion methods of NOx removal, including selective catalytic reduction (using different types of reducing reagents, including ammonia, hydrogen, hydrocarbons, and carbon monoxide), selective noncatalytic reduction, wet scrubbing, adsorption, electron beam, nonthermal plasma, and electrochemical reduction of NOx, are discussed.
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Affiliation(s)
- Fatemeh Gholami
- New Technologies - Research Centre, Engineering of Special Materials, University of West Bohemia, Plzeň 301 00, Czech Republic.
| | - Martin Tomas
- New Technologies - Research Centre, Engineering of Special Materials, University of West Bohemia, Plzeň 301 00, Czech Republic
| | - Zahra Gholami
- Unipetrol Centre of Research and Education, a.s, Areál Chempark 2838, Záluží 1, 43670 Litvínov, Czech Republic
| | - Mohammadtaghi Vakili
- Green intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China
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Plasma-Assisted Selective Catalytic Reduction for Low-Temperature Removal of NOx and Soot Simulant. Catalysts 2019. [DOI: 10.3390/catal9100853] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The challenge that needs to be overcome regarding the removal of nitrogen oxides (NOx) and soot from exhaust gases is the low activity of the selective catalytic reduction of NOx at temperatures fluctuating from 150 to 350 °C. The primary goal of this work was to enhance the conversion of NOx and soot simulant by employing a Ag/α-Al2O3 catalyst coupled with dielectric barrier discharge plasma. The results demonstrated that the use of a plasma-catalyst process at low operating temperatures increased the removal of both NOx and naphthalene (soot simulant). Moreover, the soot simulant functioned as a reducing agent for NOx removal, but with low NOx conversion. The high efficiency of NOx removal required the addition of hydrocarbon fuel. In summary, the combined use of the catalyst and plasma (specific input energy, SIE ≥ 60 J/L) solved the poor removal of NOx and soot at low operating temperatures or during temperature fluctuations in the range of 150–350 °C. Specifically, highly efficient naphthalene removal was achieved with low-temperature adsorption on the catalyst followed by the complete decomposition by the plasma-catalyst at 350 °C and SIE of 90 J/L.
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Niu C, Niu J, Wang S, Wang Z, Dong S, Fan H, Hong Y, Liu D. Synergistic effect in one-stage dielectric barrier discharge plasma and Ag/Al2O3 catalytic systems on C2H2-SCR of NOx. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Zhang L, Yang C, Zhang L, He H, Luo M, Jia Y, Li Y. Application of Plasma Treatment in Preparation of Soybean Oil Factory Sludge Catalyst and Its Application in Selective Catalytic Oxidation (SCO) Denitration. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1609. [PMID: 30181491 PMCID: PMC6163642 DOI: 10.3390/ma11091609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/24/2018] [Accepted: 08/30/2018] [Indexed: 11/29/2022]
Abstract
At present, the most commonly used denitration process is the selective catalytic reduction (SCR) method. However, in the SCR method, the service life of the catalyst is short, and the industrial operation cost is high. The selective catalytic oxidation absorption (SCO) method can be used in a low temperature environment, which greatly reduces energy consumption and cost. The C/N ratio of the sludge produced in the wastewater treatment process of the soybean oil plant used in this paper is 9.64, while the C/N ratio of the sludge produced by an urban sewage treatment plant is 10⁻20. This study shows that the smaller the C/N ratio, the better the denitration efficiency of the catalyst. Therefore, dried oil sludge is used as a catalyst carrier. The influence of different activation times, and LiOH concentrations, on catalyst activity were investigated in this paper. The denitration performance of catalysts prepared by different activation sequences was compared. The catalyst was characterized by Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM). The experimental results showed that: (1) When the concentration of the LiOH solution used for activation is 15%, and the activation time is four hours, the denitration effect of the catalyst is the best; (2) the catalyst prepared by activation before plasma roasting has the best catalytic activity.
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Affiliation(s)
- Lei Zhang
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Chao Yang
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Lei Zhang
- China National Heavy Machinery Research Institute Co., Ltd., Xi'an 710032, China.
| | - Huibin He
- Zhejiang Dechuang Environmental Protection Technology Co., Ltd., Xi'an 710000, China.
| | - Min Luo
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Yang Jia
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Yonghui Li
- China National Heavy Machinery Research Institute Co., Ltd., Xi'an 710032, China.
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