Effect of porosity of α-alumina on non-thermal plasma decomposition of ethylene in a dielectric-packed bed reactor

Gandhi, M. Sanjeeva; Ananth, Antony; Mok, Young Sun; Song, Jun-Ik; Park, Kyu Hyun

doi:10.1007/s11164-013-1053-z

Cited by 14 publications

(6 citation statements)

References 14 publications

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“…On the contrary, the nonporous a-Al 2 O 3 and ZrO 2 packing materials produced much lower decomposition efficiencies at identical temperatures. The enhanced decomposition efficiency of the porous c-Al 2 O 3 and a-Al 2 O 3 is thought to be primarily due to the adsorption of HFC-134a followed by direct interaction with the gas-phase radicals produced by the plasma (Gandhi et al 2013a). The major radical species generated in the plasma reactor have been identified as excited N 2 (…”

Section: Resultsmentioning

confidence: 99%

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Gandhi

Mok

2013

Int. J. Environ. Sci. Technol.

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The performance of 1,1,1,2-tetrafluoroethane or HFC-134a decomposition and the formation of byproducts in a dielectric barrier discharge plasma reactor were studied with different packing systems such as a-Al 2 O 3 (porous and nonporous), c-Al 2 O 3 (porous) and ZrO 2 (nonporous). Experimental variables such as reactor temperature, initial HFC-134a concentration and oxygen levels were chosen for the performance analysis. Among the packing systems, the porous c-Al 2 O 3 and a-Al 2 O 3 decomposed HFC-134a much more effectively than the nonporous a-Al 2 O 3 and ZrO 2 . The combination of the plasma with the porous cAl 2 O 3 was found to cover a wide range of initial concentration. The decomposition efficiency tended to increase with the addition of oxygen up to 2 %, but further increase in the oxygen led to a decrease. As well as carbon oxides (CO 2 and CO), significant amounts of unwanted byproducts such as COF 2 and CF 4 were also identified in the effluent gas with the nonporous a-Al 2 O 3 and ZrO 2 . On the contrary, with the porous c-Al 2 O 3 and a-Al 2 O 3 , such unwanted byproducts were considerably suppressed, enhancing the formation of CO 2 and CO.

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Section: Resultsmentioning

confidence: 99%

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Gandhi

Mok

2013

Int. J. Environ. Sci. Technol.

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“…In literature, it has been reported that packing the reactor with the same material but different surface properties like surface area and porosity influences the oxidation of VOCs and formation of by-products. Gandhi et al [102], reported that the ethylene decomposition efficiency is enhanced with porous alumina (S BET = 348.3 m 2 /g) when compared to non-porous alumina (S BET = 1.53 m 2 /g). Also the complete oxidation of ethylene to CO 2 and CO is obtained with porous alumina, whereas non-porous alumina leads to the formation of by-products such as acetaldehyde, acetylene and methane in addition to CO and CO 2 .…”

Section: Surface Propertiesmentioning

confidence: 99%

Abatement of VOCs Using Packed Bed Non-Thermal Plasma Reactors: A Review

et al. 2017

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Non thermal plasma (NTP) reactors packed with non-catalytic or catalytic packing material have been widely used for the abatement of volatile organic compounds such as toluene, benzene, etc. Packed bed reactors are single stage reactors where the packing material is placed directly in the plasma discharge region. The presence of packing material can alter the physical (such as discharge characteristics, power consumption, etc.) and chemical characteristics (oxidation and destruction pathway, formation of by-products, etc.) of the reactor. Thus, packed bed reactors can overcome the disadvantages of NTP reactors for abatement of volatile organic compounds (VOCs) such as lower energy efficiency and formation of unwanted toxic by-products. This paper aims at reviewing the effect of different packing materials on the abatement of different aliphatic, aromatic and chlorinated volatile organic compounds.

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“…The ZrO 2 nanoparticles can be even more effective for the decomposition of VOCs when combined with non‐thermal plasma. In our previous study, we have found that porous materials resulted in higher plasma‐catalytic DE of ethylene along with good selectivity toward CO 2 than non‐porous one . As recently reported, nanosized ZrO 2 has a good adsorption capability.…”

Section: Introductionmentioning

confidence: 74%

Catalytic Non-Thermal Plasma Decomposition of Ethylene by Using ZrO₂Nanoparticles

Gandhi

Mok

2014

Plasma Process. Polym.

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In the present work, ZrO2 nanoparticles loaded on glass wool (GW) were employed for catalytic and plasma‐catalytic decomposition of ethylene. Unlike ZrO2 pellets, nanosized ZrO2 was found to exhibit catalytic activity for the decomposition of ethylene. Some carbon‐containing by‐products like CH4, C2H2, and HCHO were detected under room‐temperature operation of the reactor. The formations of such unwanted by‐products were suppressed and the conversion into CO2 was enhanced when the ZrO2 catalyst was combined with non‐thermal plasma at high temperatures. The nanosized ZrO2 exhibited a stable decomposition performance during 80‐h continuous operation, suggesting that it is able to withstand deactivation without substantial loss in its catalytic activity.

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Effect of porosity of α-alumina on non-thermal plasma decomposition of ethylene in a dielectric-packed bed reactor

Cited by 14 publications

References 14 publications

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Abatement of VOCs Using Packed Bed Non-Thermal Plasma Reactors: A Review

Catalytic Non-Thermal Plasma Decomposition of Ethylene by Using ZrO₂Nanoparticles

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Effect of porosity of α-alumina on non-thermal plasma decomposition of ethylene in a dielectric-packed bed reactor

Cited by 14 publications

References 14 publications

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Abatement of VOCs Using Packed Bed Non-Thermal Plasma Reactors: A Review

Catalytic Non-Thermal Plasma Decomposition of Ethylene by Using ZrO2Nanoparticles

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Product

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About

Catalytic Non-Thermal Plasma Decomposition of Ethylene by Using ZrO₂Nanoparticles