Decomposition of phenol by hybrid gas/liquid electrical discharge reactors with zeolite catalysts

Kušić, Hrvoje; Koprivanac, Natalija; Locke, Bruce R.

doi:10.1016/j.jhazmat.2005.05.028

Cited by 64 publications

(12 citation statements)

References 37 publications

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“…There are many industrial applications involving the utilization of corona discharge, such as NO x and SO x reduction in flue gas, toxic compound destruction, and ozone production [15][16][17]. From literature review, the combination of corona discharge and heterogeneous catalysts has been used for many applications [18][19][20][21][22][23][24][25][26][27][28][29][30]. Recently in our previous works, it was also used with photocatalysts for the gaseous removal of benzene and ethylene [31,32].…”

Section: Introductionmentioning

confidence: 99%

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Chavadej

Tansuwan

Sreethawong

2008

Plasma Chem Plasma Process

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In this paper, the epoxidation of ethylene over different catalysts-namely Ag/(low-surface-area, LSA)a-Al 2 O 3 , Ag/(high-surface-area, HSA)c-Al 2 O 3 , and Au-Ag/ (HSA)c-Al 2 O 3 -in a low-temperature corona discharge system was investigated. In a comparison among the studied catalysts, the Ag/(LSA)a-Al 2 O 3 catalyst was found to offer the highest selectivity for ethylene oxide, as well as the lowest selectivity for carbon dioxide and carbon monoxide. The selectivity for ethylene oxide increased with increasing applied voltage, while the selectivity for ethylene oxide remained unchanged when the frequency was varied in the range of 300-500 Hz. Nevertheless, the selectivity for ethylene oxide decreased with increasing frequency beyond 500 Hz. The optimum Ag loading on (LSA)a-Al 2 O 3 was found to be 12.5 wt.%, at which a maximum ethylene oxide selectivity of 12.9% was obtained at the optimum applied voltage and input frequency of 15 kV and 500 Hz, respectively. Under these optimum conditions, the power consumption was found to be 12.6 9 10 -16 W s/molecule of ethylene oxide produced. In addition, a low oxygen-to-ethylene molar ratio and a low feed flow rate were also experimentally found to be beneficial for the ethylene epoxidation.

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Section: Introductionmentioning

confidence: 99%

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Chavadej

Tansuwan

Sreethawong

2008

Plasma Chem Plasma Process

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“…Meantime the novel reactors [e.g., hybrid gas-liquid electrical discharge reactor [6,14] or with distinctive electrode configuration (made of porosity reticulated vitreous carbon (RVC) [6] or cylindrical wetted wall reactor using direct contact of gas corona discharge [15]] were designed to form more numerous reactive radicals. For this reason, the reactor used in our work was designed as hybrid gas-liquid electrical discharge reactor (including the gas bubbled into reactor surrounds the needle positive electrode to form hybrid gas-liquid phase discharge.…”

Section: Introductionmentioning

confidence: 99%

Enhanced degradation of organic pollutant 4-chlorophenol in water by non-thermal plasma process with TiO2

Hao

Zhou

Zhang

et al. 2006

Plasma Chem Plasma Process

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The combined application of TiO 2 photocatalyst and pulsed high-voltage electrical discharge process for the degradation of organic pollutant parachlorophenol (4-CP) in aqueous solution was tentatively investigated. The optimum conditions for 4-CP removal were applied voltage at 14 kV, electrode distance at 2 cm, pH at 6.5 (close to neutral solution), TiO 2 concentration at 50 mg/L, gas source O 2 at 100 L/h, and hybrid corona-streamer discharge mode. Introduced TiO 2 into pulsed discharge plasma process under such optimum condition, the rate constant of 4-CP degradation (k cp ) was greatly promoted, from 1.56 · 10 )3 to 2.81 · 10 )3 s )1 , and energy efficiency for 4-CP removal was greatly enhanced by approximately one time, and it was attributed to more amounts of chemically active species (e.g., ozone and hydrogen peroxide, especially hydroxyl radicals) produced in pulsed discharge plasma process in combination with TiO 2 photocatalyst.

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“…High phenol removal yields by electrical discharge were reported in combination with a less acidic catalyst such as FeZSM-5. 303 The addition of NH4ZSM-5 and HY zeolites afforded only a very small increase in the phenol removal respect to Fe-exchanged zeolite. For FeZSM5, the phenol removal yield was almost doubled.…”

Section: Dbd-plasma Catalytic Systems For Wastewater Treatmentmentioning

confidence: 97%

Recent Progress and Prospects in Catalytic Water Treatment

et al. 2021

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Decomposition of phenol by hybrid gas/liquid electrical discharge reactors with zeolite catalysts

Cited by 64 publications

References 37 publications

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Ethylene Epoxidation over Alumina-Supported Silver Catalysts in Low-Temperature AC Corona Discharge

Enhanced degradation of organic pollutant 4-chlorophenol in water by non-thermal plasma process with TiO2

Recent Progress and Prospects in Catalytic Water Treatment

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