Conversion of Carbonyl Sulfide Using a Low-Temperature Discharge Approach

Tsai, Cheng‐Hsien; Tsai, Ping-Szu; Jou, Chih-Ju G.; Liao, Wei-Tung

doi:10.4209/aaqr.2007.03.0013

Cited by 5 publications

(6 citation statements)

References 12 publications

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“…In this study, high concentration of COS was successfully destructed and converted into other sulfur-containing products by adding H 2 or O 2 , or without an additive, utilizing a low-pressure RF discharge approach. Tsai et al (2007) show that no H 2 S was detected, which is very different from the traditional catalytic removal process, including COS hydrogenation (COS + 4H 2 = H 2 S + CH 4 + H 2 O) and hydrolysis of COS and CS 2 (COS + H 2 O → H 2 S + CO 2 ) (Tsai et al, 2007). Tsai et al (2007) indicated that the discharge approach replaced major product H 2 S with elemental sulfur that can be easily recovered with or without H 2 , and can avoid the requirement of the sequential Claus reaction in order to convert H 2 S into elemental sulfur.…”

Section: (6) Conversion Of Carbonyl Sulfide Using a Lowtemperature DImentioning

confidence: 99%

“…Tsai et al (2007) show that no H 2 S was detected, which is very different from the traditional catalytic removal process, including COS hydrogenation (COS + 4H 2 = H 2 S + CH 4 + H 2 O) and hydrolysis of COS and CS 2 (COS + H 2 O → H 2 S + CO 2 ) (Tsai et al, 2007). Tsai et al (2007) indicated that the discharge approach replaced major product H 2 S with elemental sulfur that can be easily recovered with or without H 2 , and can avoid the requirement of the sequential Claus reaction in order to convert H 2 S into elemental sulfur. However, due to the relatively low pressure, this approach is not currently practical (Tsai et al, 2007).…”

Section: (6) Conversion Of Carbonyl Sulfide Using a Lowtemperature DImentioning

confidence: 99%

“…Tsai et al (2007) indicated that the discharge approach replaced major product H 2 S with elemental sulfur that can be easily recovered with or without H 2 , and can avoid the requirement of the sequential Claus reaction in order to convert H 2 S into elemental sulfur. However, due to the relatively low pressure, this approach is not currently practical (Tsai et al, 2007).…”

Section: (6) Conversion Of Carbonyl Sulfide Using a Lowtemperature DImentioning

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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Section: (6) Conversion Of Carbonyl Sulfide Using a Lowtemperature DImentioning

confidence: 99%

Section: (6) Conversion Of Carbonyl Sulfide Using a Lowtemperature DImentioning

confidence: 99%

Section: (6) Conversion Of Carbonyl Sulfide Using a Lowtemperature DImentioning

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.

Self Cite

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show abstract

“…Liao et al (2005) studied reaction mechanism of ethylene oxide at various oxygen/ethylene oxide ratios in an RF cold plasma environment and showed the main reactions for EO decomposition changed with a varying O 2 /EO ratio in the plasma system. Tsai et al (2007) studied conversion of carbonyl sulfide using a lowtemperature discharge approach and results showed that at an inlet O 2 /COS molar ratio of 3, the removal efficiency of COS reached 98.4% at 20 W and 4000 N/m 2 , with the major product being SO 2 with small amounts of sulfur deposition. The removal efficiency of COS was lower in the H 2 -containing condition than in the O 2 -containg one.…”

Section: Introductionmentioning

confidence: 99%

Optical Emission Spectroscopy in Cooking Exhaust from a Wet Scrubber/Atmospheric Plasma Reactor

Liao

Chang

et al. 2014

Aerosol Air Qual. Res.

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This study introduced a self-developed wet scrubber/plasma reactor (WSB/PR) system to treat cooking fumes, and measured the changes in the optical emissions spectra (OES), before and after treatment using OES, in order to understand the changes of OES in a gaseous phase from waste gas. In terms of operational parameters of the experiment, the scrubbing solution used in WSB was tap water and an enzyme scrubbing solution, and atmospheric pressure plasma was applied inside PR. Furthermore, five different output powers (0.112 kJ/m 3 , 0.129 kJ/m 3 , 0.138 kJ/m 3 , 0.146 kJ/m 3 , and 0.156 kJ/m 3 ) were utilized to conduct experiments. The experimental results showed that, through the operations of five different plasma output powers, active species C, C 2 , CH, N, Hγ, N 2 , N 2 + , NO, C + , NH, O 2 + , H 2 , and O can be tested under the following three situations: (i) start PR (plasma background value) without importing cooking fumes; (ii) cooking fumes pass through WSB/PR; and (iii) cooking fumes pass through ESB/PR. When cooking fumes are treated with WSB/PR, light emission intensity intensifies with increased plasma power, from 0.112 kJ/m 3 to 0.146 kJ/m 3 . The same tendency occurs in the situation of cooking fumes treated with ESB/PR, which increases plasma power from 0.112 kJ/m 3 to 0.138 kJ/m 3 . In addition, the number of active species is reduced when plasma power is increased. This indicates that, electron energy is reduced due to the H 2 O decomposition function in the plasma reaction, which results in a decrease in the number of active species.

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Adsorption/desorption behavior of carbonyl sulfide gas on Scheelite type MWO4 adsorbent

Kim

Yeon

Park

et al. 2018

Separation and Purification Technology

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Conversion of Carbonyl Sulfide Using a Low-Temperature Discharge Approach

Cited by 5 publications

References 12 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

Optical Emission Spectroscopy in Cooking Exhaust from a Wet Scrubber/Atmospheric Plasma Reactor

Adsorption/desorption behavior of carbonyl sulfide gas on Scheelite type MWO4 adsorbent

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