scholarly journals Chlorobenzene Removal Using DBD Coupled with CuO/γ-Al2O3 Catalyst

2021 ◽  
Vol 11 (14) ◽  
pp. 6433
Author(s):  
Xingpeng Jin ◽  
Guicheng Wang ◽  
Liping Lian ◽  
Fan Gao ◽  
Renxi Zhang ◽  
...  
Keyword(s):  
Flow Rate ◽  
Barrier Discharge ◽  
Low Voltage ◽  
Discharge Power ◽  
Surface Model ◽  
Independent Variables ◽  
Important Intermediate ◽  
Dbd Reactor ◽  
Al2o3 Catalyst

The removal of chlorobenzene using a dielectric barrier discharge (DBD) reactor coupled with CuO/γ-Al2O3 catalysts was investigated in this paper. The coupling of CuO enhanced the chlorobenzene degradation and complete oxidation ability of the DBD reactor, especially under low voltage conditions. The characterization of catalyst was carried out to understand the interaction between catalyst and plasma discharge. The effects of flow rate and discharge power on the degradation of chlorobenzene and the interaction between these parameters were analyzed using the response surface model (RSM). The analysis of variance was applied to evaluate the significance of the independent variables and their interactions. The results show that the interactions between flow rate and discharge power are not negligible for the degradation of chlorobenzene. Moreover, based on the analysis of byproducts, 4-chlorophenol was discriminated as the important intermediate of chlorobenzene degradation, and the speculative decomposition mechanism of chlorobenzene is explored.

Improvement of Stability for NO Removal in Multipoint Barrier Discharge Reactor by Pulse Applied Voltage

2014 ◽  
Vol 17 (2) ◽  
Author(s):  
T. Takaki ◽  
T. Fujiwara ◽  
J. Naito ◽  
T. Sato
Keyword(s):  
Power Supply ◽  
Applied Voltage ◽  
Barrier Discharge ◽  
Low Voltage ◽  
Pulse Voltage ◽  
No Removal ◽  
Insulated Gate Bipolar Transistor ◽  
Sinusoidal Waveform ◽  
Bridge Type ◽  
Dbd Reactor

AbstractImprovement of stability for NO removal in dielectric barrier discharge (DBD) reactor by pulse applied voltage is described in this paper. Two different types of power supply are used to drive the DBD reactor. The ac type power supply produces a sinusoidal waveform at 10 kV in amplitude and 10 kHz in frequency. The pulse voltage of 10 kV is generated by a full-bridge type pulse modulator using insulated gate bipolar transistor (IGBT) switches. A duty factor of the pulse voltage is controlled in the range from 10 to 80% with a gate signal of the IGBT switches. A multipoint electrode is used in the DBD reactor for low voltage drive. NO gas is diluted with nitrogen and oxygen gas mixture (N

Experimental and Modelling of Aqueous Radioactive Waste Treatment by Ultrafiltration

2018 ◽  
Vol 69 (5) ◽  
pp. 1149-1151
Author(s):  
Laura Ruxandra Zicman ◽  
Elena Neacsu ◽  
Felicia Nicoleta Dragolici ◽  
Catalin Ciobanu ◽  
Gheorghe Dogaru ◽  
...  
Keyword(s):  
Flow Rate ◽  
Suspended Solids ◽  
Waste Treatment ◽  
Operating Pressure ◽  
Feed Flow Rate ◽  
Permeate Flux ◽  
Independent Variables ◽  
Opposite Trend ◽  
Process Factors ◽  
Volumetric Flux

Ultrafiltration of untreated and pretreated aqueous radioactive wastes was conducted using a spiral-wound polysulphonamide membrane. The influence of process factors on its performances was experimental studied and predicted. Permeate volumetric flux and permeate total suspended solids (TSS) were measured at different values of feed flow rate (7 and 10 m3/h), operating pressure (0.1-0.4 MPa), and feed TSS (15 and 60 mg/L). Permeate flux (42-200 L/(m2�h)) increased with feed flow rate and operating pressure as well as it decreased with an increase in feed TSS, whereas permeate TSS (0.1-33.2 mg/L) exhibited an opposite trend. A 23 factorial plan was used to establish correlations between dependent and independent variables of ultrafiltration process.

scholarly journals Characteristics and mechanism of toluene removal by double dielectric barrier discharge combined with an Fe2O3/TiO2/γ-Al2O3 catalyst

RSC Advances ◽  
2020 ◽  
Vol 10 (68) ◽  
pp. 41511-41522
Author(s):  
Rui Wang ◽  
Jiaze Ren ◽  
Jiangyou Wu ◽  
Lanlan Wu
Keyword(s):  
Dielectric Barrier Discharge ◽  
Removal Efficiency ◽  
Barrier Discharge ◽  
Dielectric Barrier ◽  
Toluene Removal ◽  
Al2o3 Catalyst

The removal efficiency of toluene and CO2 selectivity were improved and the production of O3 and NOx was reduced by using DBD combined with different catalysts.

scholarly journals Hot Box Investigations of a Ventilated Bioclimatic Wall for NZEB Building Façade

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1327
Author(s):  
Dwinanto Sukamto ◽  
Monica Siroux ◽  
Francois Gloriant
Keyword(s):  
Energy Efficiency ◽  
Flow Rate ◽  
Experimental Setup ◽  
Air Flow Rate ◽  
Space Thickness ◽  
Zero Energy ◽  
Interior Space ◽  
Air Space ◽  
Thermal Metrology

The building sector is the largest consumer of energy, but there are still major scientific challenges in this field. The façade, being the interface between the exterior and interior space, plays a key role in the energy efficiency of a building. In this context, this paper focuses on a ventilated bioclimatic wall for nearly zero-energy buildings (NZEB). The aim of this study is to investigate an experimental setup based on a hot box for the characterization of the thermal performances of the ventilated wall. A specific ventilated prototype and an original thermal metrology are developed. This paper presents the ventilated prototype, the experimental setup, and the experimental results on the thermal performances of the ventilated wall. The influence of the air space thickness and the air flow rate on the thermal performances of the ventilated wall is studied.

Numerical Characterization of Hot Gas Ingestion Through Turbine Rim Seals

2016 ◽  
Author(s):  
Riccardo Da Soghe ◽  
Cosimo Bianchini ◽  
Carl M. Sangan ◽  
James A. Scobie ◽  
Gary D. Lock
Keyword(s):  
Flow Rate ◽  
Numerical Study ◽  
Axial Flow ◽  
Radial Clearance ◽  
Buffering Effect ◽  
Hot Gas ◽  
Numerical Predictions ◽  
Wide Range ◽  
Thermal Buffering

This paper deals with a numerical study aimed at the characterization of hot gas ingestion through turbine rim seals. The numerical campaign focused on an experimental facility which models ingress through the rim seal into the upstream wheel-space of an axial-turbine stage. Single-clearance arrangements were considered in the form of axial- and radial-seal gap configurations. With the radial-seal clearance configuration, CFD steady-state solutions were able to predict the system sealing effectiveness over a wide range of coolant mass flow rates reasonably well. The greater insight of flow field provided by the computations illustrates the thermal buffering effect when ingress occurs: for a given sealing flow rate, the effectiveness on the rotor was significantly higher than that on the stator due to the axial flow of hot gases from stator to rotor caused by pumping effects. The predicted effectiveness on the rotor was compared with a theoretical model for the thermal buffering effect showing good agreement. When the axial-seal clearance arrangement is considered, the agreement between CFD and experiments worsens; the variation of sealing effectiveness with coolant flow rate calculated by means of the simulations display a distinct kink. It was found that the “kink phenomenon” can be ascribed to an over-estimation of the egress spoiling effects due to turbulence modelling limitations. Despite some weaknesses in the numerical predictions, the paper shows that CFD can be used to characterize the sealing performance of axial- and radial-clearance turbine rim seals.

Characterization of Brightness of Electroluminescent Device Using Powder Phosphor Composite with ZnO or TiO2

2008 ◽  
Vol 55 ◽  
pp. 150-153
Author(s):  
Mun Ja Kim ◽  
Sung Min Park ◽  
Tae Young Lee ◽  
Sang Hyun Park ◽  
Jin Young Kim ◽  
...  
Keyword(s):  
Low Voltage ◽  
Low Cost ◽  
Frequency Variation ◽  
Driving Voltage ◽  
Powder Phosphor ◽  
Previous Researcher ◽  
The Poor ◽  
Device Reliability ◽  
Coating Method

For the growth of Electroluminescent (EL) device market, the attention of many researchers is centered on improving the properties such as brightness, power consumption, device reliability, etc. The powder EL device is one of solutions for the easy mass production, the simplification of structure, and low cost. Although the powder process is the solution, that has the problem with the poor brightness than the film process. So, we focused on increasing the brightness of powder EL device. The emissive layer was made up the composites adding metal oxide nanopowder such as TiO2 and ZnO to powder phosphors. As the data of previous researcher, the TiO2 and ZnO had the different dominating traps by photovoltage measure, that is, TiO2 show hole traps, ZnO show electron traps [1]. The brightness of powder EL device proportions to the high electricfield formation. The TiO2 or ZnO in the powder phosphor composite can help the emission that may be advantageous to form high electricfield at low voltage. The EL devices with green ZnS phosphor were fabricated using spin coating method. The effect of TiO2 and ZnO on the luminescent property of EL device was investigated. The brightness was obtained as applied driving voltage at 400 Hz and frequency variation at 50 V.

scholarly journals Characterization of plasma-induced phenol advanced oxidation process in a DBD reactor

2011 ◽  
Vol 55 (1) ◽  
pp. 13811 ◽  
Author(s):  
E. Marotta ◽  
E. Ceriani ◽  
V. Shapoval ◽  
M. Schiorlin ◽  
C. Ceretta ◽  
...  
Keyword(s):  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Dbd Reactor
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