Hybrid plasma-catalytic systems for converting substances of high stability, greenhouse gases and VOC

Schmidt‐Szałowski, K.; Krawczyk, Krzysztof; Sentek, J.; Ulejczyk, Bogdan; Górska, Agnieszka; Młotek, Michał

doi:10.1016/j.cherd.2011.06.018

Cited by 28 publications

(15 citation statements)

References 52 publications

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“…However, considerable amounts of CO, and COCl 2 were detected in the reactor outlet of other studies [ 11 , 23 ]. The production of Cl 2 and CCl 4 has also been noted in the literature [ 24 , 45 ].…”

Section: Resultsmentioning

confidence: 77%

“…The reaction pathways of chloroform decomposition in a discharge medium near room temperature in the presence of oxygen have been studied in several earlier researches [ 11 , 24 , 45 ]. Based on these experimental works, one can conclude that many active radicals such as O • , OH • , Cl • , H • , CCl 3 • , CHCl 2 • etc.…”

Section: Resultsmentioning

confidence: 99%

“…are generated during the short initial step of decomposition resulting from the electron collisions with the existed molecules. The products of the fast reactions of this step are mainly dominated by both COCl 2 and Cl 2 through numerous reaction pathways [ 45 ]. These chlorinated intermediates participate in subsequent reactions with O 2 to yield some peroxy radicals such as CHCl 2 O 2 , and CCl 3 O 2 , following by degradation into Oxy radicals, which in turn react with other radicals like Cl • to form COCl 2 according to Mok et al [ 11 ].…”

Section: Resultsmentioning

confidence: 99%

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Enhanced performance of non-thermal plasma coupled with TiO2/GAC for decomposition of chlorinated organic compounds: influence of a hydrogen-rich substance

Abedi

Shahna

Jaleh

et al. 2014

J Environ Health Sci Engineer

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BackgroundNo study was found in the literature on the combination of TiO2/GAC catalyst and non-thermal plasma for chlorinated volatile organic compounds abatement in air. This paper presents this hybrid process for the decomposition of chloroform (as a target compound) using a multi-pin to plate discharge reactor. The experiments were performed using a high frequency pulsed transformer as the power supply system to examine the effect of SIE, frequency, as well as initial concentration on the chloroform removal efficiency (RE). Toluene was added as a hydrogen-rich source to shift the reactions into the formation of environmentally desirable products.ResultsRE of around 60% was observed with the NTP-alone process at the highest possible SIE (3000 J L−1), while it rocketed up to 100% (total oxidation) in the presence of TiO2/GAC at SIE of 1000 J L−1. About 100% O3 destruction over TiO2/GAC and both adsorption and catalytic activities of GAC may be considered as the reasons for better performance of the hybrid process. Toluene feeding diminished the chlorinated by-products such as Cl2 and TCE significantly. The selectivity towards CO2 was noticed to enhance noticeably, when both catalyst and toluene were introduced, regardless of the input concentration.ConclusionsOur findings suggest that the hybrid of NTP with TiO2/GAC will highly be effective in the abatement of chloroform, and the addition of toluene will successfully decline harmful chlorinated by-products.

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Enhanced performance of non-thermal plasma coupled with TiO2/GAC for decomposition of chlorinated organic compounds: influence of a hydrogen-rich substance

Abedi

Shahna

Jaleh

et al. 2014

J Environ Health Sci Engineer

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“…Numerous studies have shown that the formation of free radicals or ion-radicals is the first and decisive stage for the non-oxidative conversion of hydrocarbons in non-equilibrium plasmas (Schmidt-Szałowski et al, 2011 ). Obviously, the radicalic pathway, in addition to the oxidation of the hydrocarbon, is also matter of polymerization of small derived entities with the formation of large polyaromatic structures, namely, soot.…”

Section: Discussionmentioning

confidence: 99%

Toluene oxidation by non-thermal plasma combined with palladium catalysts

Măgureanu¹,

Dobrin²,

Mandache³

et al. 2013

Front. Chem.

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The oxidation of toluene in air was investigated using a dielectric barrier discharge (DBD) combined with a Pd/Al2O3 catalyst. When using only plasma, rather low selectivity toward CO2 was obtained: 32–35%. By filling the DBD reactor with Pd/Al2O3 catalyst the CO2 selectivity was significantly enhanced (80–90%), however, a large amount of toluene was desorbed from the catalyst when the discharge was operated. By filling a quarter of the discharge gap with catalyst and placing the rest of the catalyst downstream of the plasma reactor, an important increase of CO2 selectivity (~75%) and a 15% increase in toluene conversion were achieved as compared to the results with plasma alone. The catalyst exhibited a very good stability in this reaction.

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“…For the traditional plasma-catalysis systems, the VOCs gas was continuously introduced into the discharge zone during the reaction, and it was called continuously introduced plasma-catalytic system [19][20][21][22]. Recently, a new plasma system called adsorption-discharge plasma catalytic system has been developed, which could further improve the CO 2 selectivity and lower the energy cost.…”

Section: Introductionmentioning

confidence: 99%

Plasma-catalysis of metal loaded SBA-15 for toluene removal: Comparison of continuously introduced and adsorption-discharge plasma system

Wang

et al. 2016

Chemical Engineering Journal

103

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Hybrid plasma-catalytic systems for converting substances of high stability, greenhouse gases and VOC

Cited by 28 publications

References 52 publications

Enhanced performance of non-thermal plasma coupled with TiO2/GAC for decomposition of chlorinated organic compounds: influence of a hydrogen-rich substance

Enhanced performance of non-thermal plasma coupled with TiO2/GAC for decomposition of chlorinated organic compounds: influence of a hydrogen-rich substance

Toluene oxidation by non-thermal plasma combined with palladium catalysts

Plasma-catalysis of metal loaded SBA-15 for toluene removal: Comparison of continuously introduced and adsorption-discharge plasma system

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