Effective combination of nonthermal plasma and catalysts for decomposition of benzene in air

Ogata, Atsushi; Einaga, Hisahiro; Kabashima, Hajime; Futamura, Shigeru; Kushiyama, Satoshi; Kim, Hyun‐Ha

doi:10.1016/s0926-3373(03)00180-2

Cited by 98 publications

(47 citation statements)

References 17 publications

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“…Many researcher found that for VOCs control, ferroelectric could improve energy efficiency significantly , but ozone concentration increased due to ferroelectric presence (Yamamoto et al, 1992). Ogata et al (2003) investigated the effects of alumina and metal ions in plasma discharge using NTP reactors packed with a mixture of BaTiO 3 and porous Al 2 O 3 pellets. The results indicated that the oxidative decomposition of benzene was enhanced by concentrating benzene on the Al 2 O 3 pellets.…”

Section: Introductionmentioning

confidence: 99%

Volatile organic compounds decomposition using nonthermal plasma coupled with a combination of catalysts

Zhu

Wan

et al. 2011

Int. J. Environ. Sci. Technol.

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A series of experiments were performed for toluene decomposition from a gaseous influent at normal temperature and atmospheric pressure by nonthermal plasma coupled with a combination of catalysts technology. Nonthermal plasma was generated by dielectric barrier discharge. γ-Al 2 O 3 was used to be a sorbent and a catalyst carrier. Nanocatalysts were MnO 2 /γ-Al 2 O 3 coupled with modified ferroelectric of nano-Ba 0.8 Sr 0.2 Zr 0.1 Ti 0.9 O 3 . γ-Al 2 O 3 played an important role in prolonging reaction time of nonthermal plasma with volatile organic compounds molecules. MnO 2 /γ-Al 2 O 3 has an advantage for ozone removal, while nano-Ba 0.8 Sr 0.2 Zr 0.1 Ti 0.9 O 3 is a kind of good ferroelectric material for improving energy efficiency. Thus these packed materials were incorporated together to strengthen nonthermal plasma power for volatile organic compounds decomposition. The results showed the synergistic technology resulted in greater enhancement of toluene removal and energy efficiencies and a better inhibition for ozone formation in the gas exhaust. Based on the data analysis of the Fourier transforms infrared spectrum, the reaction process of toluene decomposition and the mechanism of synergistic effect are discussed. The results showed in a complex oxidation mechanism of toluene via several pathways, producing either ringretaining or ringopening products. The final products were carbon dioxide and water.

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Section: Introductionmentioning

confidence: 99%

Volatile organic compounds decomposition using nonthermal plasma coupled with a combination of catalysts

Zhu

Wan

et al. 2011

Int. J. Environ. Sci. Technol.

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“…However, the intermediates produced during photocatalytic oxidation occupy the active sites of the catalyst surface, thereby deactivating the catalyst. Some researchers have used plasma to generate reactive species, including energetic electrons and atomic oxygen, to oxidize BTX into CO 2 and H 2 O (Delagrange et al, 2006;Ogata et al, 2003;Van Durme et al, 2007), but the high energy consumption required by this process and the formation of undesired byproducts restrict its application. Adsorption is a good choice for the removal of BTX.…”

Section: Introductionmentioning

confidence: 99%

In situ adsorption-catalysis system for the removal of o-xylene over an activated carbon supported Pd catalyst

Huang

Zhang

2009

Journal of Environmental Sciences

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An activated carbon (AC) supported Pd catalyst was used to develop a highly efficient in situ adsorption-catalysis system for the removal of low concentrations of o-xylene. In this study, three kinds of Pd/AC catalysts were prepared and tested to investigate the synergistic efficiency between adsorption and catalysis for o-xylene removal. The Pd/AC catalyst was first used as an adsorbent to concentrate dilute o-xylene at low temperature. After saturated adsorption, the adsorbed o-xylene was oxidized to CO 2 and H 2 O by raising the temperature of the catalyst bed. The results showed that more than 99% of the adsorbed o-xylene was completely oxidized to CO 2 over a 5% Pd/AC catalyst at 140°C. Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), temperatureprogrammed desorption (TPD), and temperature-programmed oxidation (TPO) were applied to investigate the physical properties of o-xylene adsorption-desorption and the in situ adsorption-catalysis activity of the AC support and Pd/AC catalyst. A synergistic relationship between the AC support and the active Pd species for the removal of low concentrations of o-xylene was established.

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“…In particular, non-thermal plasma has attracted much attention as an method for VOCs control for two decades due to its unique properties such as quick response at ambient temperature, achievement of high electron energies within short residence times, system compactness, and easy operations (Muhamad, 2000;Li et al, 2006). In order to improve the energy efficiency of the VOCs decomposition process by the plasma, the cooperation with catalyst has been tested by some researchers (Einaga et al, 2001;Guo et al, 2006;Jim, 2008;Krawczyk, 2001;Magureanu et al, 2007a and b;Ogata et al, 2003;Wallis et al, 2007;Li et al, 2007;Zhu et al, 2007b). These studies showed that the combination of discharge plasma with catalyst is a very effective method in VOCs removal.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of benzene by non-thermal plasma processing: Photocatalyst and ozone effect

Zhu

Jin

et al. 2008

Int. J. Environ. Sci. Technol.

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Plasma technology has some shortcomings, such as higher energy consumption and byproducts produced in the reaction process. However non-thermal plasma associated with catalyst can resolve these problems. Therefore this kind of technology was paied more and more attention to treat waste gas. A hybrid system comprising a non-thermal plasma reactor and nanometer titanium dioxide catalyst was used for benzene removal in the air. The paper described the synergistic effect of ozone and photocatalyst in the plasma reactor. Except of electric field strength, humidity and flow velocity, the synergistic behavior of ozone and photocatalyst was tested. The removal efficiency of benzene reaches nearly 99% when benzene concentration is 600 mg/m 3 , and the removal efficiency of benzene also reaches above 90% when benzene concentration is 1500 mg/m 3 . The plasma reactor packed with photocatalyst shows a better selectivity of carbon dioxide than that without photocatalyst. The final products is mostly carbon dioxide, water and a small quantity of carbon monoxide.

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Effective combination of nonthermal plasma and catalysts for decomposition of benzene in air

Cited by 98 publications

References 17 publications

Volatile organic compounds decomposition using nonthermal plasma coupled with a combination of catalysts

Volatile organic compounds decomposition using nonthermal plasma coupled with a combination of catalysts

In situ adsorption-catalysis system for the removal of o-xylene over an activated carbon supported Pd catalyst

Decomposition of benzene by non-thermal plasma processing: Photocatalyst and ozone effect

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