Contributions of photocatalytic/catalytic activities of TiO2 and γ-Al2O3 in nonthermal plasma on oxidation of acetaldehyde and CO

Sano, Taizo; Negishi, Nobuaki; Sakai, Emiko; Matsuzawa, Sadao

doi:10.1016/j.molcata.2005.10.002

Cited by 104 publications

(58 citation statements)

References 27 publications

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“…Indeed, UV light is produced by non-thermal plasma due to excited nitrogen molecules. Sano et al [23] reported that in the absence of TiO 2 , UV light was emitted in a plasma discharge. The strongest emissions originate from the second positive system (SPS: C 3 P u !…”

Section: Plasma Light Emission Triggering Photocatalysismentioning

confidence: 99%

Combining non-thermal plasma with heterogeneous catalysis in waste gas treatment: A review

Durme¹,

Dewulf²,

Leys³

et al. 2008

Applied Catalysis B: Environmental

651

379

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Plasma driven catalysis is a promising technology for waste gas treatment characterized by higher energy efficiencies, high mineralization rates and low by-product formation. The combination of heterogeneous catalysts with non-thermal plasma can be operated in two configurations: positioning the catalyst in the discharge zone (in-plasma catalysis) or downflow the discharge zone (post plasma catalysis).In a first part of the review, changes of plasma properties resulting from the introduction of catalyst material are discussed. It has been reported that discharge types can even change. Accordingly, it was reported that microdischarges are formed within the catalyst pores. Changing plasma characteristics can eventually result in enhanced production of new active species, increasing the oxidizing power of the plasma discharge.In a second part, it is discussed that plasma discharges also affect catalyst properties such as a change in chemical composition, enhancement in surface area or change of catalytic structure. These phenomena partially explain why catalyst adsorption kinetics of airborne pollutants are affected when exposed to plasma discharges.It is also reviewed that the synergy of combining plasma with catalysts can not only be attributed to the production of new reactive species. Also plasma photon emission or thermal hot-spots can initiate catalytic pollutant oxidation reactions.To conclude, an overview of recently published manuscripts concerning plasma catalysis for volatile organic compounds abatement is given. It is also discussed why heterogeneous plasma catalysis has high potential for the simultaneous abatement of NO x and hydrocarbons. #

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Section: Plasma Light Emission Triggering Photocatalysismentioning

confidence: 99%

Combining non-thermal plasma with heterogeneous catalysis in waste gas treatment: A review

Durme¹,

Dewulf²,

Leys³

et al. 2008

Applied Catalysis B: Environmental

651

379

View full text Add to dashboard Cite

show abstract

“…Comparison of these two design parameters clearly indicates the potential of PDC process for the VOC removal. Recent studies, however, provided several experimental evidences that the role of UV in the PDC process is minor due to the low UV dose [45,46]. UV dose in photocatalytic process is in the order of several mW cm −2 , whereas it is only in the order of several μW cm −2 in nonthermal plasma in air.…”

Section: -P9mentioning

confidence: 99%

Nonthermal plasma activates catalyst: from current understanding and future prospects

Kim

Ogata

2011

Eur. Phys. J. Appl. Phys.

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Abstract. Combination of two old-yet-new technologies (plasma and catalyst) is getting attentions for the advanced processes in 21 century. This paper reports the complementary combination of atmospheric pressure nonthermal plasma with catalyst for the air pollution control application. The most important feature of this complementary combination is that plasma enables catalyst to work even at room temperature. Up-to-date data on catalyst screening for the cycled system will be given in terms of enhancement factor and adsorption capacity. Visual observation using ICCD camera was applied to study how discharge plasma interacts with catalyst at atmospheric-pressure and ambient temperature.

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“…The IPC technique with dielectric barrier discharge (DBD) packed-bed reactor achieved most attention in recent years (Durme et al 2008). Many catalyst formulations have been developed and tested, and BaTiO 3 , Al 2 O 3 , SiO 2 , TiO 2 , MnO 2 , and their derivates are usually adopted in IPC (Sano et al 2006). It has also been found that the conversion of 100 ppm toluene increases with the discharge voltage at a constant frequency of 200 Hz.…”

Section: Introductionmentioning

confidence: 99%

Catalytic behavior and synergistic effect of nonthermal plasma and CuO/AC catalyst for benzene destruction

Cao

Liu

et al. 2015

Int. J. Environ. Sci. Technol.

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Nonthermal plasma-catalysis hybrid technology (NTP-C) operated at ambient temperature and pressure offers an innovative and effective approach to solving the problem of dilute volatile organic compounds pollution. Herein, the destruction of benzene (50-450 ppm) over an in-plasma NTP-C composite system was investigated. The AO x /active carbon (AO x /AC), AO x /3A molecular sieve (AO x /MS), and AO x /c-Al 2 O 3 (A = Fe, Ag, Zn, Mn, and Cu) catalysts were prepared by the incipientwetness impregnation method. The destruction performances of NTP alone and NTP-C are compared under different reaction conditions, such as inlet reactant concentration, catalyst type, and energy density. AC exhibits the best benzene removal efficiency among three catalyst supports, and the performances of AO x /AC under different conditions follow the trend ofThe NTP with CuO/AC system exhibits the highest benzene elimination capability with almost 90.6 % inlet benzene removed at energy density of 70 and 270 J L -1 . The strong adsorption ability of AC and the optimal catalytic ability of crystalline structure of CuO on the AC support may be contributed to the excellent performance of CuO/AC. It is found that the NO x by-product also can be well controlled over NTP-CuO/AC system. Additionally, the surface of CuO/AC is more slipperier and homogeneous with the reaction proceeding, indicating higher stability of CuO/AC.

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Contributions of photocatalytic/catalytic activities of TiO2 and γ-Al2O3 in nonthermal plasma on oxidation of acetaldehyde and CO

Cited by 104 publications

References 27 publications

Combining non-thermal plasma with heterogeneous catalysis in waste gas treatment: A review

Combining non-thermal plasma with heterogeneous catalysis in waste gas treatment: A review

Nonthermal plasma activates catalyst: from current understanding and future prospects

Catalytic behavior and synergistic effect of nonthermal plasma and CuO/AC catalyst for benzene destruction

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