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

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.

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 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%.

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
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