Decomposition of carbon dioxide in the RF plasma environment

Hsieh, Lien‐Te; Lee, Wen‐Jhy; Li, Chun‐Teh; Chen, Chuh‐Yung; Wang, Ya‐Fen; Chang, M.L.

doi:10.1002/(sici)1097-4660(199812)73:4<432::aid-jctb972>3.3.co;2-s

Cited by 9 publications

(14 citation statements)

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“…Application of radio-frequency (RF) plasma as an alternative technology for the decomposition of carbon dioxide with methane gas is demonstrated (Hsieh et al, 1998c). The results revealed that in CO 2 /CH 4/ Ar plasma, the best decomposition fraction of carbon dioxide was 60.0%, which occurs around 316°C in the condition designed for 5% feeding concentration of CO 2 , 5% feeding concentration of CH 4 , 20 torr operation pressure, 100 sccm total gas flow rate and 90 watts input power wattage.…”

Section: (2) Decomposition Of Carbon Dioxide In the Rf Plasma Environsupporting

confidence: 85%

“…The results revealed that in CO 2 /CH 4/ Ar plasma, the best decomposition fraction of carbon dioxide was 60.0%, which occurs around 316°C in the condition designed for 5% feeding concentration of CO 2 , 5% feeding concentration of CH 4 , 20 torr operation pressure, 100 sccm total gas flow rate and 90 watts input power wattage. The CH, CH 2 and CH 3 radicals obtained from the destruction of CH 4 could result effectively in high decomposition of CO 2 in the plasma reactor (Hsieh et al, 1998c). Hsieh et al (1998c) show the optimal mathematical models based on the experimental data obtained and tested the proposal model by means of sensitivity analysis, which shows that the input power wattage (W) was the most sensitive parameter for the CO 2 decomposition.…”

Section: (2) Decomposition Of Carbon Dioxide In the Rf Plasma Environmentioning

confidence: 97%

“…The CH, CH 2 and CH 3 radicals obtained from the destruction of CH 4 could result effectively in high decomposition of CO 2 in the plasma reactor (Hsieh et al, 1998c). Hsieh et al (1998c) show the optimal mathematical models based on the experimental data obtained and tested the proposal model by means of sensitivity analysis, which shows that the input power wattage (W) was the most sensitive parameter for the CO 2 decomposition.…”

Section: (2) Decomposition Of Carbon Dioxide In the Rf Plasma Environmentioning

confidence: 99%

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Decomposition of Methyl Tert-Butyl Ether by Adding Hydrogen in a Cold Plasma Reactor

Hsieh

Tsai

Chang

et al. 2011

Aerosol Air Qual. Res.

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Methyl tert-butyl ether (MTBE) is extensively used as an oxygenate and octane enhancer in gasoline. Its release to the environment has generated great public and governmental concern. In this study, we give a brief review of the decomposition of air toxics by the application of radio frequency (RF) plasma reactors and then present our study on decomposition of methyl tert-butyl ether by adding hydrogen in a cold plasma reactor. Based on our references, there are four types of the application in the RF plasma reactors are discussed, including: (i) Application I.: Converting methane, decomposing carbon dioxide, ethoxyethane, and ethylene oxide; (ii) Application II.: Decomposing methyl chloride, 1,1-C 2 H 2 Cl 2 , and CH 2 Cl 2 ; (iii) Application III.: Decomposing dichlorodifluoromethane, CHF 3 , CH 2 F 2 , CCl 2 F 2 , and BF 3 ; (iv) Application IV.: Decomposing dichlorodifluoromethane, CH 3 SH, CS 2 , SF 6 , and SF 6 + H 2 S mixture. Moreover, this study demonstrates the feasibility of applying a radio frequency (RF) plasma reactor for decomposing and converting MTBE. Experimental results indicate that the decomposition efficiency (η MTBE ) and the fraction of total input carbon converted into CH 4 , C 2 H 2 and C 2 H 4 (F CH4+C2H2+ C2H4 ) increased with the input power and decreased as both the H 2 /MTBE ratio and the MTBE influent concentration in the MTBE/H 2 /Ar plasma environment increased. Interestingly, applying radio frequency plasma to the decomposition of MTBE while adding hydrogen constitutes alternative method of decomposing and converting MTBE into CH 4 , C 2 H 4 , C 2 H 2, iso-butane and iso-butene.

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Section: (2) Decomposition Of Carbon Dioxide In the Rf Plasma Environsupporting

confidence: 85%

Section: (2) Decomposition Of Carbon Dioxide In the Rf Plasma Environmentioning

confidence: 97%

Section: (2) Decomposition Of Carbon Dioxide In the Rf Plasma Environmentioning

confidence: 99%

See 1 more Smart Citation

Decomposition of Methyl Tert-Butyl Ether by Adding Hydrogen in a Cold Plasma Reactor

Hsieh

Tsai

Chang

et al. 2011

Aerosol Air Qual. Res.

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“…CO 2 + (H, OH) = CO + (OH, H 2 O) (Hsieh, 1998b) (35) The formation of CO competed with that of CO 2 , as the specific energy was increased at various total flow rates, especially above 15.0 kWh.Nm -3 . However, changing the applied power did not cause this competition.…”

Section: Specific Energymentioning

confidence: 97%

“…CO + O = CO 2 (Hsieh, 1998b) (31) CO + OH = CO 2 + H (Hsieh, 1998b) (32) CH x + O 2 = CO 2 + xH (Hsieh, 1998b) …”

Section: Specific Energymentioning

confidence: 99%

Direct Conversion of Methane into Methanol and Formaldehyde in an RF Plasma Environment II: Effects of Experimental Parameters

Wang

Tsai

Shih

et al. 2005

Aerosol Air Qual. Res.

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To provide information on the conversion of methane in a non-catalyzed radio-frequency (RF) plasma system into valuable chemicals, such as HCHO, CH 3 OH, C 2 H 6 , C 2 H 4 and C 2 H 2 , an experiment was conducted to convert methane directly into methanol and formaldehyde. The effects of experimental parameters-specific energy (power or flow variation) and CH 4 and O 2 feeding concentrations-were examined. Carbon-based by-products generated in a CH 4 /O 2 /Ar RF plasma system included CO, CO 2 , HCHO, CH 3 OH, C 2 H 6 , C 2 H 4 and C 2 H 2 . The methane conversion ratio increased as the feeding concentration of O 2 and the specific energy was increased, but decreased with feeding of CH 4 . Increasing power in the RF plasma system did not favor the partial oxidation of CH 4 toward CH 3 OH and HCHO, but did favor the production of C 2 -hydrocarbons (C 2 H 6 , C 2 H 4 and C 2 H 2 ), CO, and CO 2 . The CH 4 feeding concentration of under 15% or an O 2 content of under 10% favored the formation of CH 3 OH and HCHO. CO concentration decreased as the feeding concentration of CH 4 increased, and increased as the feeding concentration of O 2 increased. The yield of CH 3 OH was less than 1%. No carbon black or deposition was observed. Further research will seek to increase the yield of CH 3 OH and HCHO by adding catalysts to the system.

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Degradation of CO₂ through dielectric barrier discharge microplasma

Duan

et al. 2014

Greenhouse Gases

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The continually increasing use of fossil fuels throughout the world has caused carbon dioxide (CO2) concentration to grow rapidly in the atmosphere. Increasing CO2 emissions are the major cause of global warming, and a number of studies have been done to show the predicted effects of global warming. This paper reported a method of degradation of CO2 through dielectric barrier discharge (DBD) plasma; a microplasma reactor was used to decompose CO2 into carbon monoxide (CO) at normal atmosphere and room temperature. Gas chromatography was used to analyze the compositions of the outlet gases. No carbon deposits were found in this work. A variety of parameters, such as feed flow rate, input power, frequency, discharge gap, and external electrode length were investigated. The effects of these parameters on CO2 conversion were examined. At the same time, the effects of feed flow rate and input power on the energy efficiency were studied. The results indicated that a higher conversion of CO2 can be realized with a lower feed flow rate, a limited higher input power and a lower frequency. However, a higher feed flow rate and a lower input power were beneficial for energy utilization. The discharge gap had a little effect on the conversion of CO2 in microplasma reactor. In this work, the highest conversion of CO2 was 18.0%, and the highest energy efficiency was 3.8%. The DBD microplasma is a promising method for decomposing CO2.© 2014 Society of Chemical Industry and John Wiley & Sons, Ltd

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Decomposition of carbon dioxide in the RF plasma environment

Cited by 9 publications

References 0 publications

Decomposition of Methyl Tert-Butyl Ether by Adding Hydrogen in a Cold Plasma Reactor

Decomposition of Methyl Tert-Butyl Ether by Adding Hydrogen in a Cold Plasma Reactor

Direct Conversion of Methane into Methanol and Formaldehyde in an RF Plasma Environment II: Effects of Experimental Parameters

Degradation of CO₂ through dielectric barrier discharge microplasma

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Decomposition of carbon dioxide in the RF plasma environment

Cited by 9 publications

References 0 publications

Decomposition of Methyl Tert-Butyl Ether by Adding Hydrogen in a Cold Plasma Reactor

Decomposition of Methyl Tert-Butyl Ether by Adding Hydrogen in a Cold Plasma Reactor

Direct Conversion of Methane into Methanol and Formaldehyde in an RF Plasma Environment II: Effects of Experimental Parameters

Degradation of CO2 through dielectric barrier discharge microplasma

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Product

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Degradation of CO₂ through dielectric barrier discharge microplasma