scholarly journals Plasma generation using dielectric barrier discharge reactor for phenol degradation in batik wastewater

2021 ◽  
Vol 912 (1) ◽  
pp. 012090
Author(s):  
A N Sa’adah ◽  
K B Saputra ◽  
M D Fadholi ◽  
V Hermansyah ◽  
N Aryanti
Keyword(s):  
Phenolic Compounds ◽  
Dielectric Barrier Discharge ◽  
Analysis Of Variance ◽  
Barrier Discharge ◽  
Phenol Degradation ◽  
Phenol Concentration ◽  
Dielectric Barrier ◽  
Plasma Generation ◽  
Plasma Electrolysis ◽  
Dbd Reactor

Abstract Batik wastewater contains phenolic compounds. Phenolic compounds are hematotoxic, hepatotoxic, and capable of causing mutagenesis and carcinogenesis in humans and other living organisms. Therefore, phenol compounds need to be degraded. This study uses plasma electrolysis method with Dielectric Barrier Discharge (DBD) reactor to degrade phenolic compounds in Batik wastewater. The purpose of this study was to characterize the Dielectric Barrier Discharge (DBD) reactor, to determine the effect of voltage and type of catalyst on phenol concentration, and to determine the interaction between voltage and catalyst type on the response of phenol concentration through analysis of variance (ANOVA). The result obtained from the characterization of the reactor is ignition voltage at 1400 Volt. The best degradation results of phenolic compounds were obtained in the treatment of Batik wastewater with FeSO4 catalyst at 2600 Volt. The phenol reduction in the best conditions reached 88.73%. Based on analysis of variance (ANOVA), voltage and quadratic catalyst variables affect the response of phenol concentrations in batik waste.

Duty Factor Effect on Ozone Production Using Dielectric Barrier Discharge Reactor Driven by IGBT Pulse Modulator

2007 ◽  
Vol 10 (2) ◽  
Author(s):  
T. Miura ◽  
T. Sato ◽  
K. Arima ◽  
S. Mukaigawa ◽  
K. Takaki ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Applied Voltage ◽  
Barrier Discharge ◽  
Pulse Voltage ◽  
Ozone Production ◽  
Duty Factor ◽  
Pure Oxygen ◽  
Dielectric Barrier ◽  
Pulse Modulator ◽  
Dbd Reactor

AbstractAn ozone production using pulse voltage driven dielectric barrier discharge (DBD) reactor was investigated experimentally to clarify an influence of a duty factor of applied pulse voltage on ozone yield. A square of 10 kV applied voltage was generated using a pulse modulator. Insulated gate bipolar transistor (IGBT) switches were employed to generate the square pulse with 1 kHz in pulse repetition rate. Duty factor of the pulse voltage was controlled in range from 10 to 80% by timing of a gate signal to the IGBT switches. The output voltages of the power supply were applied to a multipoint electrode type DBD reactor in order to operate at low applied voltage. The ozone yield was obtained to be around 100 g/kWh at several thousands ppm ozone production in pure oxygen circumstance at 5 L/min. gas flow. The ozone yield decreased with increasing ozone concentration and was almost independent of the duty factor of square applied voltage under the present experimental condition. Power loss consumed in the pulse modulator was successfully reduced by decreasing duty factor of the output voltage without decrease of the ozone production.

scholarly journals Abatement of Toluene by Reverse-Flow Nonthermal Plasma Reactor Coupled with Catalyst

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 511 ◽  
Author(s):  
Wenjun Liang ◽  
Huipin Sun ◽  
Xiujuan Shi ◽  
Yuxue Zhu
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Reverse Flow ◽  
Plasma Reactor ◽  
Nonthermal Plasma ◽  
Toluene Degradation ◽  
Dielectric Barrier ◽  
Reactor Temperature ◽  
Dbd Reactor ◽  
By Products

In order to make full use of the heat in nonthermal plasma systems and decrease the generation of by-products, a reverse-flow nonthermal plasma reactor coupled with catalyst was used for the abatement of toluene. In this study, the toluene degradation performance of different reactors was compared under the same conditions. The mechanism of toluene abatement by nonthermal plasma coupled with catalyst was explored, combined with the generation of ozone (O3), NO2, and organic by-products during the reaction process. It was found that a long reverse cycle time of the reactor and a short residence time of toluene decreased the internal reactor temperature, which was not beneficial for the degradation of toluene. Compared with the dielectric barrier discharge (DBD) reactor, toluene degradation efficiency in the double dielectric barrier discharge (DDBD) reactor was improved at the same discharge energy level, but the concentrations of NO2 and O3 in the effluent were relatively high; this was improved after the introduction of a catalyst. In the reverse-flow nonthermal plasma reactor coupled with catalyst, the CO2 selectivity was the highest, while the selectivity and amount of NO2 was the lowest and aromatics, acids, and ketones were the main gaseous organic by-products in the effluent. The reverse-flow DBD-catalyst reactor was successful in decreasing organic by-products, while the types of organic by-products in the DDBD reactor were much more than those in the DBD reactor.

scholarly journals Reduction of tar from biomass gasification using a dielectric barrier discharge reactor

2021 ◽  
Vol 1195 (1) ◽  
pp. 012004
Author(s):  
M Lim ◽  
Z Alimuddin
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Polyaromatic Hydrocarbons ◽  
Plasma Reactor ◽  
Biomass Gasification ◽  
Condensation Temperature ◽  
Dielectric Barrier ◽  
Mixing Chamber ◽  
Non Thermal Plasma ◽  
Dbd Reactor

Abstract A non-thermal plasma reactor was used to investigate its effectiveness in reducing the by-products from biomass gasification. Biomass is used for generating heat and power through gasification, which is a process of converting solid fuel to gaseous fuel at temperatures of 700 to 900 °C by operating a reactor in sub-stoichiometric conditions. This gas mixture can be utilized for liquid fuel synthesis or for fuel cells. However, the by-product of gasification consists of tar, which consists of oxygenates, ringed-aromatics, phenolic compounds, and polyaromatic hydrocarbons (PAH). Depending on the composition, the condensation temperature can be as high as 450 °C, fouling downstream equipment. In this study, a dielectric barrier discharge (DBD) reactor with a coil as the inner electrode was used to reduce toluene, a model tar compound. Toluene was injected into a mixing chamber that was heated to 900 °C, evaporating the toluene, and is entrained by nitrogen into the DBD reactor. High voltage is injected into the DBD reactor to initiate ionization, decomposing the toluene into lighter hydrocarbons. A sampling bottle submerged in an ice bath collects the residual toluene, and the resulting decomposition rate is as high as 70%.

scholarly journals Construction of a power electronic source for cold plasma generation

2019 ◽  
Vol 20 (4) ◽  
pp. 1-12 ◽  
Author(s):  
Roberto Carlos Martínez Montejano ◽  
Carlos Miguel Castillo Escandón ◽  
Víctor Esteban Espinoza López ◽  
Isaac Campos Cantón ◽  
María Guadalupe Neira Velázquez ◽  
...  
Keyword(s):  
Electric Field ◽  
Dielectric Barrier Discharge ◽  
High Voltage ◽  
High Frequency ◽  
Barrier Discharge ◽  
Strong Electric Field ◽  
Power Electronic ◽  
Dielectric Barrier ◽  
Plasma Generation ◽  
Electronic Source

This paper presents the development of a high voltage and high-frequency power electronics source, for plasma generation, at atmospheric pressure and vacuum, using helium and air as working gases. The source design consists of an inductive (L) full bridge series resonant inverter at high frequency, where the control implemented allows varying duty cycle and frequency. Plasma generation is made by high voltage with the power signal applied on two electrodes, which provides a strong electric field that excites, and thus, ionize helium particles or air particles. The power electronic source operation was tested in different plasma reactor configurations (dielectric barrier discharge, double dielectric barrier discharge, and jet type discharge). The developed power electronics source shows a correct performance and generate a strong electric field to achieve the plasma discharges desired.

CuO@Cu/Ag/MWNTs/sponge electrode-enhanced pollutant removal in dielectric barrier discharge (DBD) reactor

Chemosphere ◽  
2019 ◽  
Vol 229 ◽  
pp. 273-283 ◽  
Author(s):  
Yi Zhang ◽  
Jutao Nie ◽  
Chenchen Yuan ◽  
Yupei Long ◽  
Mengjiao Chen ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Pollutant Removal ◽  
Dielectric Barrier ◽  
Dbd Reactor

The removal of styrene using a dielectric barrier discharge (DBD) reactor and the analysis of the by-products and intermediates

2012 ◽  
Vol 39 (3) ◽  
pp. 1021-1035 ◽  
Author(s):  
Hongbo Zhang ◽  
Kan Li ◽  
Tonghua Sun ◽  
Jingping Jia ◽  
Xueli Yang ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Dielectric Barrier ◽  
Dbd Reactor ◽  
By Products

Numerical Optimization Research on the Dielectric Barrier Discharge for NOx Removal

2011 ◽  
Vol 356-360 ◽  
pp. 1238-1243
Author(s):  
Hai Ping Xiao ◽  
Xu Du ◽  
Lei Wang
Keyword(s):  
Dielectric Barrier Discharge ◽  
Numerical Optimization ◽  
Barrier Discharge ◽  
Breakdown Strength ◽  
Optimization Method ◽  
Nox Removal ◽  
Discharge Time ◽  
Dielectric Barrier ◽  
Dbd Reactor ◽  
Discharge Gap

Numerical optimization research was made for the dielectric barrier discharge (DBD) reactor for NOx removal in order to improve the efficiency of the DBD reactor. In this paper, the optimization method proposed by our studying team was adopted to carry out the numerical optimization research on the discharge gap of the reactor. As a result, the breakdown strength of reactor was 44.8kV/cm at a 2mm discharge gap and the discharge started at 25μs. When the discharge gap increased to 8mm, the breakdown strength was 34.1kV/cm and the discharge time was 33μs. The removal rates under the two conditions varied little due to the similar electron mean energy, then experiment was conducted to validate the accuracy of the simulation. When the discharge gap increased, the gas handing capacity of the reactor got higher.Therefore, proper discharge gap has important influence on removal efficiency of NO during DBD.

scholarly journals In Plasma Catalytic Oxidation of Toluene Using Monolith CuO Foam as a Catalyst in a Wedged High Voltage Electrode Dielectric Barrier Discharge Reactor: Influence of Reaction Parameters and Byproduct Control

2019 ◽  
Vol 16 (5) ◽  
pp. 711 ◽  
Author(s):  
Juexiu Li ◽  
Hongbo Zhang ◽  
Diwen Ying ◽  
Yalin Wang ◽  
Tonghua Sun ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Removal Efficiency ◽  
High Voltage ◽  
Barrier Discharge ◽  
Degradation Mechanism ◽  
Anthropogenic Sources ◽  
Substantial Contribution ◽  
High Voltage Electrode ◽  
Dielectric Barrier ◽  
Dbd Reactor

Volatile organic compounds (VOCs) emission from anthropogenic sources has becoming increasingly serious in recent decades owing to the substantial contribution to haze formation and adverse health impact. To tackle this issue, various physical and chemical techniques are applied to eliminate VOC emissions so as to reduce atmospheric pollution. Among these methods, non-thermal plasma (NTP) is receiving increasing attention for the higher removal efficiency, non-selectivity, and moderate operation, whereas the unwanted producing of NO2 and O3 remains important drawback. In this study, a dielectric barrier discharge (DBD) reactor with wedged high voltage electrode coupled CuO foam in an in plasma catalytic (IPC) system was developed to remove toluene as the target VOC. The monolith CuO foam exhibits advantages of easy installation and controllable of IPC length. The influencing factors of IPC reaction were studied. Results showed stronger and more stable plasma discharge in the presence of CuO foam in DBD reactor. Enhanced performance was observed in IPC reaction for both of toluene conversion rate and CO2 selectivity compared to the sole NTP process at the same input energy. The longer the contributed IPC length, the higher the toluene removal efficiency. The toluene degradation mechanism under IPC condition was speculated. The producing of NO2 and O3 under IPC process were effectively removed using Na2SO3 bubble absorption.

Sign in / Sign up

Export Citation Format

Share Document