Conversion of SO<sub>2</sub> into elemental sulfur by using the RF plasma technique

Tsai, Chao-Ming; Lee, Wen Jhy; Shih, Margaret; Chen, Chuh Yung; Tsai, Perng Jy

doi:10.1002/aic.10046

Cited by 11 publications

(14 citation statements)

References 26 publications

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“…(Tsai et al, 2004). Finally, Tsai et al (2004) suggests that the operating condition of R = 2 and P = 90 W would be the most appropriate combination for SO 2 conversion.…”

Section: (5) Conversion Of So 2 Into Elemental Sulfur By Using the Rfmentioning

confidence: 99%

“…In 2004, Tsai et al (2004) demonstrated a new approach for converting SO 2 into elemental sulfur by adding CH 4 in a RF plasma reactor. With the applied power (P) of the RF reactor specified at 90 W and operating pressure set at 4000 N/m 2 , Tsai et al (2004) demonstrated that as the CH 4 /SO 2 ratio (R) was increased from 0.3 to 1.0, most sulfur-containing products were in the form of elemental sulfur (Tsai et al, 2004).…”

Section: (5) Conversion Of So 2 Into Elemental Sulfur By Using the Rfmentioning

confidence: 99%

“…With the applied power (P) of the RF reactor specified at 90 W and operating pressure set at 4000 N/m 2 , Tsai et al (2004) demonstrated that as the CH 4 /SO 2 ratio (R) was increased from 0.3 to 1.0, most sulfur-containing products were in the form of elemental sulfur (Tsai et al, 2004). In fact, their results indicate that the use of the RF plasma technique was not only beneficial to convert SO 2 , but also was able to convert CH 4 into useful materials.…”

Section: (5) Conversion Of So 2 Into Elemental Sulfur By Using the Rfmentioning

confidence: 99%

“…An advantage of using the RF plasma reactor is that a conventional reaction therein can be completed at a lower temperature elsewhere (Hsieh et al, 1998a). Many studies have demonstrated that the destruction or treatment of hazardous gases by applying RF plasma technology is very practical Li et al, 1996;Hsieh et al, 1998a, b, c;Wang et al, 1999a, b;Liao et al, 2000;Wang et al, 2000;Hsieh et al, 2001;Liao et al, 2001;Tsai et al, 2001;Shih et al, 2002;Tsai et al, 2002;Shih et al, 2003;Tsai et al, 2003;Wang et al, 2003;Tsai et al, 2004;Liao et al,2005;Wang et al, 2005a, b;Hsieh et al, 2007;Tsai et al, 2007). The above mentioned cited articles (from 1996 to 2007) show that RF power is delivered through the power meter and the matching unit to an outer copper electrode that is wrapped around the reactor, the other electrode is earthed.…”

Section: Introduction and A Brief Review Of Decomposition Of Air Toximentioning

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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“…(Tsai et al, 2004). Finally, Tsai et al (2004) suggests that the operating condition of R = 2 and P = 90 W would be the most appropriate combination for SO 2 conversion.…”

Section: (5) Conversion Of So 2 Into Elemental Sulfur By Using the Rfmentioning

confidence: 99%

Section: (5) Conversion Of So 2 Into Elemental Sulfur By Using the Rfmentioning

confidence: 99%

Section: (5) Conversion Of So 2 Into Elemental Sulfur By Using the Rfmentioning

confidence: 99%

Section: Introduction and A Brief Review Of Decomposition Of Air Toximentioning

confidence: 99%

See 2 more Smart Citations

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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“…A radio frequency (rf) discharge, commonly at the industrial frequency of 13.56 MHz because of easy coupling, is used to generate plasma for ion chromatography manufacture or surface modification and has not been used to remove NO, although it has been successfully applied to remove SO 2 and convert CH 4 in previous studies. 14,15 Therefore, an rf plasma approach for removing NO was used in this study.…”

Section: Introductionmentioning

confidence: 99%

Effects of CH₄ and CO on the Reduction of Nitric Oxide to Nitrogen in a Discharge Reactor

Tsai

Hsieh

Chang³

et al. 2007

Journal of the Air & Waste Management Association

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Additives are often added to enhance the efficiency of NO removal. This study uses a radio frequency (rf) discharge to consider the effect of added CH 4 and CO to simulated NO/N 2 /O 2 /H 2 O mixtures on the elevation of NO conversion and the reduction of NO into N 2 . The enhancement levels of NO conversion when using various additives were found to be in this order: ϩCH 4 Ͼ ϩCO Ͼ no additive. NO conversion reached 99.3%, 86.2%, and 77.6% when adding CH 4 , CO, and without additive, respectively, at inlet additive/NO molar ratio (R) ϭ 5 and at 120 W. Moreover, the fraction of total N atoms converted from NO into N 2 (F N2 ) was very high, reaching 99.4% and 99.5% when adding CH 4 and CO, respectively, at R ϭ 1 and at 120 W. The better operating conditions are using CH 4 as the additive at R Ն 1 and a power of Ͼ60 W to reach a higher NO conversion with a higher F N2 . However, it should be noted that this rf plasma approach is not practical at this stage because of its relative low pressure.

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Regenerating flue‐gas desulfurizing agents by bipolar membrane electrodialysis

Huang

Jacobs

2005

AIChE Journal

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Conversion of SO₂ into elemental sulfur by using the RF plasma technique

Abstract: This study demonstrates a new approach for converting SO 2 into elemental sulfur by adding CH 4 in a radio-frequency (RF) plasma reactor. With the applied power (P) of the

Cited by 11 publications

References 26 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

Effects of CH₄ and CO on the Reduction of Nitric Oxide to Nitrogen in a Discharge Reactor

Regenerating flue‐gas desulfurizing agents by bipolar membrane electrodialysis

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Conversion of SO2 into elemental sulfur by using the RF plasma technique

Abstract: This study demonstrates a new approach for converting SO 2 into elemental sulfur by adding CH 4 in a radio-frequency (RF) plasma reactor. With the applied power (P) of the

Cited by 11 publications

References 26 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

Effects of CH4 and CO on the Reduction of Nitric Oxide to Nitrogen in a Discharge Reactor

Regenerating flue‐gas desulfurizing agents by bipolar membrane electrodialysis

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Product

Resources

About

Conversion of SO₂ into elemental sulfur by using the RF plasma technique

Effects of CH₄ and CO on the Reduction of Nitric Oxide to Nitrogen in a Discharge Reactor