Deposition of oxygenated hydrocarbons in a packed-bed plasma reactor during the oxidation of toluene: influence of applied voltage

The degradation effectiveness and reaction kinetics of representative organophosphorus (OP) pesticide in a packed-bed plasma reactor have been studied. Important parameters, including peak voltage, pulse frequency, gas-flow rate, initial concentration, diameter of catalyst particles, and thickness of catalyst bed which influences the removal efficiency, were investigated. Experimental results indicated that rogor removal efficiency as high as 80% can be achieved at 35 kV with the gas flow rate of 800 mL/min and initial concentration of 11.2 mg/m3.The removal efficiency increased with the increase of pulsed high voltage, and pulse frequency, the decrease of the diameter of catalyst particles and the thickness of catalyst bed. Finally, a model was established to predict the degradation of the rogor, which generally can simulate the experimental measurements to some degree.

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Development of Fiber Bragg Grating (FBG) as Temperature Sensor Inside Packed-bed Non-thermal Plasma Reactor

Jurnal Teknologi ◽

10.11113/jt.v68.2960 ◽

2014 ◽

Vol 68 (3) ◽

Cited By ~ 1

Author(s):

Siti Musliha Aishah Musa ◽

RK Raja Ibrahim ◽

Asrul Izam Azmi

Keyword(s):

Fiber Bragg Grating ◽

Temperature Variation ◽

Thermal Plasma ◽

Temperature Sensor ◽

Plasma Reactor ◽

Packed Bed ◽

Bragg Grating ◽

Wavelength Shift ◽

Bragg Wavelength ◽

Non Thermal Plasma

This paper presents early work on Fiber Bragg grating (FBG) as temperature sensor to monitor temperature variation inside a packed-bed non-thermal plasma reactor. FBG made from germania-doped fiber with center Bragg wavelength of 1552.5 nm was embedded inside non-thermal plasma reactor with sphere shape dielectric bead (barium titanate) and used to probe the temperature variation inside the reactor. The experimental works have proven that FBG is a suitable sensor to monitor temperature variation inside of reactor via LabVIEW program. Besides that, Optical Spectrum Analyzer (OSA) recorded Bragg wavelength shift as voltage of power supply increases, which indicate the non-uniform temperature variation occurring inside the reactor. However, it does not affect the chemical reaction inside the reactor because the temperature condition is in steady state.

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Decomposition of Volatile Organic Compounds by a Packed-Bed Reactor and a Pulsed-Corona Plasma Reactor

Non-Thermal Plasma Techniques for Pollution Control ◽

10.1007/978-3-642-78476-7_18 ◽

1993 ◽

pp. 223-237 ◽

Cited By ~ 33

Author(s):

T. Yamamoto ◽

P. A. Lawless ◽

M. K. Owen ◽

D. S. Ensor ◽

C. Boss

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Plasma Reactor ◽

Packed Bed ◽

Packed Bed Reactor ◽

Corona Plasma ◽

Pulsed Corona ◽

Volatile Organic

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Plasma Catalytic Conversion of CH4 to Alkanes, Olefins and H2 in a Packed Bed DBD Reactor

Processes ◽

10.3390/pr8070774 ◽

2020 ◽

Vol 8 (7) ◽

pp. 774

Author(s):

Mohammadreza Taheraslani ◽

Han Gardeniers

Keyword(s):

Barrier Discharge ◽

Plasma Reactor ◽

Packed Bed ◽

Reaction Pathways ◽

Ambient Conditions ◽

Alumina Catalyst ◽

Dbd Plasma ◽

Hydrogenation Reactions ◽

Notable Increase

Methane is activated at ambient conditions in a dielectric barrier discharge (DBD) plasma reactor packed with Pd/γ-alumina catalyst containing different loadings of Pd (0.5, 1, 5 wt%). Results indicate that the presence of Pd on γ-alumina substantially abates the formation of deposits, leads to a notable increase in the production of alkanes and olefins and additionally improves the energy efficiency compared to those obtained for the non-packed reactor and the bare γ-alumina packed reactor. A low amount of Pd (0.5 and 1 wt%) favors achieving a higher production of olefins (mainly C2H4 and C3H6) and a higher yield of H2. Increasing Pd loading to 5 wt% promotes the interaction of H2 and olefins, which consequently intensifies the successive hydrogenation of unsaturated compounds, thus incurring a higher production of alkanes (mainly C2H6 and C3H8). The substantial abatement of the deposits is ascribed to the role of Palladium in moderating the strength of the electric and shifting the reaction pathways, in the way that hydrogenation reactions of deposits’ precursors become faster than their deposition on the catalyst.

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Study of Dielectric Barrier Discharge in Air and Estimation of Electron Density and Energy Deposition

Journal of Science and Engineering ◽

10.3126/jsce.v7i0.26780 ◽

2019 ◽

Vol 7 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Bhesh Bahadur Thapa ◽

Raju Bhai Tyata

Keyword(s):

Dielectric Barrier Discharge ◽

Electron Density ◽

Applied Voltage ◽

Atmospheric Pressure ◽

Barrier Discharge ◽

Plasma Reactor ◽

Atmospheric Pressure Plasma ◽

Half Cycle ◽

Voltage Versus ◽

Dielectric Barrier

This paper reports the electrical behaviors of atmospheric pressure plasma reactor with Dielectric Barrier Discharge (DBD) in air medium. The DBD discharge was generated in air at atmospheric pressure using Disc Electrode Geometry (DEG) reactor powered by ac voltage (0-7kV) at a frequency of 24kHz. The glass plates of thickness 1.0mm and 3.0mm were used as dielectric. The current-voltage characteristics were studied for two air gap of 2.0mm and 3.0mm by varying the applied voltages. The numbers of filamentary micro discharges were found as increased in each half cycle with increase in power. The observations of Lissajous figure of applied voltage versus electric current was used for measuring energy deposited by discharge and also compared with calculated value. Lissajous figures clearly show that the energy deposited by discharge was dependent on applied voltage. The electron density of discharge was measured by power balance method. Electron density was found in the order of 1017 per cubic meter.

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