Decomposition of gas-phase benzene using plasma-driven catalyst (PDC) reactor packed with Ag/TiO2 catalyst

Kim, Hyun‐Ha; Oh, Seung-Min; Ogata, Atsushi; Futamura, Shigeru

doi:10.1016/j.apcatb.2004.09.008

Cited by 159 publications

(82 citation statements)

References 28 publications

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“…There is no direct correlation between the amount of ozone formed in the NTP reactor to its efficiency, nevertheless, the oxidation of various hydrocarbons in catalytic plasma reactor might be due to the decomposition of ozone on the catalyst surface leading to the formation of strong oxidizing species, mainly atomic oxygen [6,9,16,22,23,26,27]. During the present study, MnO x /SMF catalytic electrode showed better performance during the destruction of IPA compared to CoO x /SMF and SMF.…”

Section: Ozone Formation In the Dbd Reactormentioning

confidence: 88%

“…In this context, non-thermal plasma (NTP) produced at atmospheric pressure could be a method of choice. In NTP, the electrical energy is primarily utilized for the production of energetic electrons, leaving the background gas nearly at room temperature [6][7][8][9][10][11][12][13]. In addition, NTP produces active species like radicals, excited molecules and ions.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, NTP produces active species like radicals, excited molecules and ions. When air is used as the carrier gas, ozone is also formed due to the oxygen ionization [6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Novel Catalytic Dielectric Barrier Discharge Reactor for Gas-Phase Abatement of Isopropanol

Subrahmanyam

Renken

Kiwi‐Minsker

2006

Plasma Chem Plasma Process

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Catalytic gas-phase abatement of air containing 250 ppm of isopropanol (IPA) was carried out with a novel dielectric barrier discharge (DBD) reactor with the inner catalytic electrode made of sintered metal fibers (SMF). The optimization of the reactor performance was carried out by varying the voltage from 12.5 to 22.5 kV and the frequency in the range 200-275 Hz. The performance was significantly improved by modifying SMF with Mn and Co oxide. Under the experimental conditions used, the MnO x /SMF showed a higher activity towards total oxidation of IPA as compared to CoO x /SMF and SMF electrodes. The complete destruction of 250 ppm of IPA was attained with a specific input energy of~235 J/L using the MnO x /SMF catalytic electrode, whereas, the total oxidation was achieved at 760 J/L. The better performance of the MnO x /SMF compared to other catalytic electrodes suggests the formation of short-lived active species on its surface by the in-situ decomposition of ozone.

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Section: Ozone Formation In the Dbd Reactormentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Novel Catalytic Dielectric Barrier Discharge Reactor for Gas-Phase Abatement of Isopropanol

Subrahmanyam

Renken

Kiwi‐Minsker

2006

Plasma Chem Plasma Process

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“…(Shen andKu 1999: Chen et al 2006). Earlier attempts combining NTP with a TiO 2 photocatalyst to abate VOCs indicated the contribution of photocatalysis induced by UV light from the plasma (Kang et al 2002;Kim et al 2005b;Subrahmanyam et al 2007;Huang and Li 2011;Ochiai et al 2011). Interestingly, Ogata et al observed an improved efficiency of a photoinactive TiO 2 -rutile catalyst during the destruction of chlorofluorocarbons, which they attributed to the surface oxygen atoms .…”

Section: Introductionmentioning

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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“…A combination of NTP and heterogeneous catalysis increases the efficiency of VOC destruction per unit of energy input. [5][6][7][8][9] Trichloroethylene (TCE) is a widely used industrial solvent whose abatement by NTP results in formation of undesired products like phosgene, leading to low selectivity toward total oxidation. Nonthermal plasma in air produces ultraviolet (UV) light, mainly due to the radiative transitions of excited nitrogen molecules.…”

Section: Introductionmentioning

confidence: 99%

Nonthermal Plasma Abatement of Trichloroethylene Enhanced by Photocatalysis

et al. 2007

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Abatement of trichloroethylene (TCE, 250 ppm in air) was studied in a novel nonthermal plasma (NTP) dielectric barrier discharge reactor with an inner electrode made of sintered metal fibers (SMF). The SMF electrodes modified with TiO 2 and MnO 2 were observed to be catalytically active. Their efficiency in TCE decomposition was compared with a Cu inner electrode. The SMF electrode modified with MnO 2 and TiO 2 catalyst effectively destroys TCE due to the synergy between plasma excitation of the TCE molecules and their catalytic oxidation. The latter process was observed to be further enhanced by photocatalysis since TiO 2 absorbs the UV light produced by the NTP. These innovative TiO 2 -modified SMF electrodes were characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), confirming formation of titania anatase, whereas the emission spectrum of the plasma showed the presence of ultraviolet light.

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Decomposition of gas-phase benzene using plasma-driven catalyst (PDC) reactor packed with Ag/TiO2 catalyst

Cited by 159 publications

References 28 publications

Novel Catalytic Dielectric Barrier Discharge Reactor for Gas-Phase Abatement of Isopropanol

Novel Catalytic Dielectric Barrier Discharge Reactor for Gas-Phase Abatement of Isopropanol

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

Nonthermal Plasma Abatement of Trichloroethylene Enhanced by Photocatalysis

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