Involvement of catalyst materials in nonthermal plasma chemical processing of hazardous air pollutants

Futamura, Shigeru; Zhang, Aihua; Einaga, Hisahiro; Kabashima, Hajime

doi:10.1016/s0920-5861(01)00503-x

Cited by 121 publications

(48 citation statements)

References 13 publications

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“…More recently, Yuan et al (16) used a radio-frequency-powered atmospheric pressure plasma jet (APPJ) for the decomposition of binary mixture of naphthalene (Nap) and n-butanol in air assisted by Ar working gas and showed that a higher destruction performance of the APPJ reactor in term of conversions of Nap and n-butanol over 99% and their rate constants was achieved in conjunction with Pt/Al 2 O 3 catalyst at SV = 17,400 h -1 . The results indicated that a low performance was improved by combining plasma with a heterogeneous catalyst to promote oxidative decomposition VOCs, in agreement with previous findings by non-thermal plasma techniques (17)(18)(19)(20)(21). It should be pointed out that Ar is commonly used to facilitate the ignition and stabilization of plasma glow discharge.…”

Section: Introductionsupporting

confidence: 89%

Destruction of n-butanol by an Atmospheric-pressure Plasma Jet over Air and Ar Working Gases with a Pt/Al2O3 Catalyst

Yuan

Chang

Lin

et al. 2016

Journal of Advanced Oxidation Technologies

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Abstract:Plasma decompositions of n-butanol (n-b) in air over working gases of air (n-b/air with 21 vol.% O 2 ) and Ar (nb/air/Ar with 5 vol.% O 2 ) were studied using an atmospheric-pressure plasma jet (APPJ) reactor with and without Pt/Al 2 O 3 catalyst. The utilization of catalytic APPJ (CAPPJ) shows excellent performance in terms of the conversion of n-butanol in n-b/air of 94.7% and n-b/air/Ar of 99.5% at plasma energy density = 3.75 kJ L -1 and space velocity = 17,400 h -1 . By comparing the working gases of air and Ar, the results indicate that n-b/air/Ar system exhibits slightly better performance than n-b/air system in APPJ and CAPPJ, suggesting that energetic primary electrons from Ar discharge would sufficiently retain the plasma reactive species for facilitating the decomposition of n-butanol. The proposed kinetic models show good agreement with the experimental data of APPJ and CAPPJ. The information obtained is useful for the operation, design and analysis of plasma system.

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Section: Introductionsupporting

confidence: 89%

Destruction of n-butanol by an Atmospheric-pressure Plasma Jet over Air and Ar Working Gases with a Pt/Al2O3 Catalyst

Yuan

Chang

Lin

et al. 2016

Journal of Advanced Oxidation Technologies

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“…Various types of electrical discharges have been investigated for the oxidation of chlorinated hydrocarbons: pulsed corona discharges [5][6][7][8][9], atmospheric pressure glow discharges [10], dielectric barrier discharges [8,9,[11][12][13][14][15][16], dielectric packed-bed discharges [3,4,8,12,15,17], surface discharges [13,14,18]. In a recent review of the physics and applications of dielectric barrier discharges (DBD) [2], Kogelschatz addresses also the treatment of VOC, mentioning as main advantages of DBDs their simplicity and scalability.…”

Section: Introductionmentioning

confidence: 99%

“…Manganese oxides and manganese phosphates placed either inside the electrical discharge or downstream of the discharge reactor were found useful for the oxidation of benzene and toluene [12,19,[21][22][23]. In these works it was suggested that Mnbased catalysts have the ability to decompose ozone, forming strong oxidizing species which react with the VOC molecules on the catalyst surface.…”

Section: Introductionmentioning

confidence: 99%

Improved performance of non-thermal plasma reactor during decomposition of trichloroethylene: Optimization of the reactor geometry and introduction of catalytic electrode

Măgureanu

Mandache

Parvulescu

et al. 2007

Applied Catalysis B: Environmental

120

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The decomposition of trichloroethylene (TCE) by non-thermal plasma was investigated in a dielectric barrier discharge (DBD) reactor with a copper rod inner electrode and compared with a plasma-catalytic reactor. The particularity of the plasma-catalytic reactor is the inner electrode made of sintered metal fibers (SMF) coated by transition metal oxides. In order to optimize the geometry of the plasma reactor, the efficiency of TCE removal was compared for different discharge gap lengths in the range of 1-5 mm. Shorter gap lengths (1-3 mm) appear to be more advantageous with respect to TCE conversion. In this case TCE conversion varies between 67% and 100% for input energy densities in the range of 80-480 J/l, while for the 5 mm discharge gap the conversion was lower (53-97%) for similar values of the input energy. As a result of TCE oxidation carbon monoxide and carbon dioxide were detected in the effluent gas. Their selectivity was rather low, in the range 14-24% for CO 2 and 11-23% for CO, and was not influenced by the gap length. Several other chlorinated organic compounds were detected as reaction products.When using MnOx/SMF catalysts as the inner electrode of the DBD reactor, the TCE conversion was significantly enhanced, reaching $95% at 150 J/l input energy. The selectivity to CO 2 showed a major increase as compared to the case without catalysts, reaching 58% for input energies above 550 J/l. #

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“…Some studies reported the optimal water vapor content for achieving the best VOC removal efficiency (Ricketts et al 2004;Sugasawa et al 2010: Karuppiah et al 2012). The effect of water vapor has been mostly studied with packed-bed DBD reactors for removal of benzene (Ogata et al 2000;Cal and Schluep 2001;Futamura et al 2002). The influence on the removal process seems to be suppression or a negative effect.…”

Section: Resultsmentioning

confidence: 99%

Catalytic nonthermal plasma reactor for the abatement of low concentrations of benzene

Karuppiah

Reddy

et al. 2013

Int. J. Environ. Sci. Technol.

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Oxidative decomposition of dilute benzene in air was carried out in a dielectric barrier discharge reactor with inner metal fiber electrode that was later modified with transition metal oxides. Typical results indicated the best performance of the designed reactor for the removal of dilute benzene, where conventional techniques may not be efficient. The introduction of transition metal oxides in the discharge zone increased the conversion of benzene and shifted the product distribution to total oxidation. The performance of the reactor was further improved on humidification of air stream. The better performance of MnO x /SMF over CoO x and SMF may be due to in situ decomposition of ozone that may lead to the formation of strong oxidant atomic oxygen, whereas the best performance with TiO 2 /MnO x /SMF may be assigned due to the synergy between ozone decomposition on MnO x surface and photocatalytic action on TiO 2 .

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Involvement of catalyst materials in nonthermal plasma chemical processing of hazardous air pollutants

Cited by 121 publications

References 13 publications

Destruction of n-butanol by an Atmospheric-pressure Plasma Jet over Air and Ar Working Gases with a Pt/Al2O3 Catalyst

Destruction of n-butanol by an Atmospheric-pressure Plasma Jet over Air and Ar Working Gases with a Pt/Al2O3 Catalyst

Improved performance of non-thermal plasma reactor during decomposition of trichloroethylene: Optimization of the reactor geometry and introduction of catalytic electrode

Catalytic nonthermal plasma reactor for the abatement of low concentrations of benzene

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