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Saud S, Nguyen DB, Bhattarai RM, Matyakubov N, Nguyen VT, Ryu S, Jeon H, Kim SB, Mok YS. Plasma-catalytic ethylene removal by a ZSM-5 washcoat honeycomb monolith impregnated with palladium. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:127843. [PMID: 34844801 DOI: 10.1016/j.jhazmat.2021.127843] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/29/2021] [Accepted: 11/16/2021] [Indexed: 06/13/2023]
Abstract
The effective removal of dilute ethylene in a novel honeycomb plasma reactor was investigated using a honeycomb catalyst (Pd/ZSM-5/monolith) sandwiched between two-perforated electrodes operating at ambient temperature. Herein, the dependence of catalyst performance on the binder fraction, catalyst preparation method, and catalyst loading was examined. Ethylene removal was carried out by a process comprising cycles of 30-min adsorption conjugated with 15-min plasma-catalytic oxidation. Interestingly, the performance of the cyclic process was superior to continuous plasma-catalytic oxidation and thermally activated catalyst in terms of energy conservation, i.e., ~36 compared to ~105 and ~300 J/L, respectively. Hence, the novel cyclic process can be considered advanced-oxidation technology that features room-temperature oxidation, offers low energy consumption, negligible hazardous by-products emissions such as NOx and O3. Moreover, the process operated under described conditions: low-pressure drop, ambient atmosphere, a mechanically stable system, and a simple reactor configuration, suggesting the practical applicability of this plasma process.
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Affiliation(s)
- Shirjana Saud
- 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
| | - Roshan Mangal Bhattarai
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Nosir Matyakubov
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Van Toan Nguyen
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea
| | - Seungmin Ryu
- Plasma Technology Research Center, Korea Institute of Fusion Energy, Jeollabuk-do 54004, Republic of Korea
| | - Hyungwon Jeon
- Plasma Technology Research Center, Korea Institute of Fusion Energy, Jeollabuk-do 54004, Republic of Korea
| | - Seong Bong Kim
- Plasma Technology Research Center, Korea Institute of Fusion Energy, Jeollabuk-do 54004, Republic of Korea
| | - Young Sun Mok
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea.
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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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3
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Matyakubov N, Nguyen DB, Saud S, Heo I, Kim SJ, Kim YJ, Lee JH, Mok YS. Effective practical removal of acetaldehyde by a sandwich-type plasma-in-honeycomb reactor under surrounding ambient conditions. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125608. [PMID: 33730645 DOI: 10.1016/j.jhazmat.2021.125608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/26/2021] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
The effective removal of acetaldehyde by humidified air plasma was investigated with a high throughput of contaminated gas in a sandwiched honeycomb catalyst reactor at surrounding ambient temperature. Here, acetaldehyde at the level of a few ppm was successfully oxidized by the honeycomb plasma discharge despite the harsh condition of large water content in the feed gas. The conversion rate of acetaldehyde increased significantly with the presence of catalysts coating on the surface channels. The increased conversion rate was also obtained with a high specific energy input (SEI) and total flow rate. Interestingly, the conversion changed negligibly under the acetaldehyde concentration range from 5 to 20 ppm. However, the conversion rate decreased toward increased water amount in the feed gas. Notably, about 60% of acetaldehyde in the feed was oxidized under SEI of 40 J/L at water amounts ≤ 2.5%, approximately 0.5 g/kWh for acetaldehyde removal. Also, the plasma-catalyst reaction was superior to the thermal reactive catalyst for acetaldehyde removal in airborne pollutants. In comparison with other plasma-catalyst sources for acetaldehyde removal, the energy efficiency under the condition is comparable. Moreover, the honeycomb plasma discharge features high throughput, avoiding pressure drop, and straightforward reactor configuration, suggesting potential practical applications.
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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, Viet Nam.
| | - 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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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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Nguyen DB, Saud S, Matyakubov N, Mok YS, Ryu S, Jeon H, Kim SB. Propagation of humidified air plasma in a sandwich-type honeycomb plasma reactor and its dependence on the ambient temperature and reactor diameter. ACTA ACUST UNITED AC 2020. [DOI: 10.1088/1361-6595/abc819] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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