Oxidation of volatile organic compounds by using a microwave-induced plasma process

Mok, Young Sun; Kang, Ho-Chul; Cho, Moo Hyun; Nam, In−Sik; Korea, South

doi:10.1007/bf02697235

Cited by 9 publications

(3 citation statements)

References 22 publications

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“…Consequently, new photocatalysts are needed to eliminate NO x compounds, which cause secondary contamination. Previously, we attempted to introduce V-TiO 2 for the photodecomposition of methyl orange, which has a nitrogen component [7]. We discovered that the addition of vanadium to the TiO 2 framework improved the photodecomposition of nitrogen compounds compared to pure TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

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NH3 removal using the dielectric barrier discharge plasma-V-TiO2 photocatalytic hybrid system

Ban

Kim

Choung

et al. 2008

Korean J. Chem. Eng.

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This study investigates the photocatalytic performance of V-TiO 2 for removal of highly concentrated ammonia (1,000 ppm) in the dielectric barrier discharge (DBD), plasma-photocatalytic, hybrid system. The V (1.0, 5.0, 10.0 mol-%)-TiO 2 photocatalysts were prepared by using the conventional sol-gel method. Their surface areas were decreased with increasing vanadium component. The UV-visible absorption band slightly shifted to more visible wavelengths in V-TiO 2 compared to that in pure TiO 2 . The NH 3 -TPD result confirmed that the ability of NH 3 adsorption on the surface of V-TiO 2 increased with increasing vanadium content, and was maximized for 5.0-mol% V-TiO 2 . The NH 3 decomposition was enhanced with the photocatalyst compared to the decomposition rate without catalysts, while the decomposition was further increased with the applied plasma voltage. The NH 3 decomposition reached 90% after 400 min at an applied plasma voltage of 10.0 kV, and various intermediates, such as -NH 2 , -NH, and NO, were also identified by using the Fourier transform infrared (FT-IR) spectra. In addition, the NH 3 decomposition reached 100% in the plasma-5.0 mol% V-TiO 2 , photocatalytic, hybrid system after 25 min, compared to 98% in the pure V-TiO 2 photocatalytic system after 150 min. In addition, the various undesirable byproducts were depressed when V-TiO 2 photocatalyst was used compared to that in the non-catalytic system.

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Section: Introductionmentioning

confidence: 99%

“…In recent years, several papers have established that these problems can be overcome by using discharge plasma as the driving light source for photocatalysis [7,8]. Strong plasma is likely to elevate the excited rate of the electrons on the surface of the TiO 2 catalyst, compared with UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

NH3 removal using the dielectric barrier discharge plasma-V-TiO2 photocatalytic hybrid system

Ban

Kim

Choung

et al. 2008

Korean J. Chem. Eng.

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“…The feasibility of plasma processes is limited by energy efficiency and the formation of toxic by-products. Processes have been developed using various plasma reactors, including surface discharge [4,5], dielectric barrier discharge [6][7][8], pulsed corona discharge [2,3,9], and microwave plasma [10] reactors. To improve the efficiency of the process, recent research has been directed toward the combination of catalysts or adsorbents with a nonthermal plasma reactor [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effect of zeolite in surface discharge plasma on the decomposition of toluene

Kim

Ogata

et al. 2005

Catal Lett

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Toluene was decomposed in a surface discharge plasma reactor packed with various zeolites. The positioning effect of the zeolite bed was also investigated Reactor-B, in which the zeolite bed was located upstream, performed much better than Reactor-A, in which the zeolite bed was located downstream. Furthermore, the decomposition efficiency in Reactor-B increased with the capacity for toluene adsorption on zeolite, while that in Reactor-A did not. The toluene adsorbed in micropores was not decomposed effectively by direct electron impact, but was decomposed by active oxygen species generated in the plasma zone on the zeolite surface. A good correlation was also observed between toluene decomposition and ozone consumption in the downwardtype reactor.

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Reaction pathways of methane conversion in dielectric-barrier discharge

Kim¹,

Lee

et al. 2003

Korean J. Chem. Eng.

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Oxidation of volatile organic compounds by using a microwave-induced plasma process

Cited by 9 publications

References 22 publications

NH3 removal using the dielectric barrier discharge plasma-V-TiO2 photocatalytic hybrid system

NH3 removal using the dielectric barrier discharge plasma-V-TiO2 photocatalytic hybrid system

Effect of zeolite in surface discharge plasma on the decomposition of toluene

Reaction pathways of methane conversion in dielectric-barrier discharge

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