scholarly journals A two-step modelling approach for plasma reactors – experimental validation for CO2 dissociation in surface wave microwave plasma

2019 ◽  
Vol 4 (7) ◽  
pp. 1253-1269 ◽  
Author(s):  
Sergio H. Moreno ◽  
Andrzej I. Stankiewicz ◽  
Georgios D. Stefanidis
Keyword(s):  
Surface Wave ◽  
Performance Analysis ◽  
Experimental Validation ◽  
Microwave Plasma ◽  
Second Step ◽  
Plasma Reactors ◽  
Plasma Model ◽  
Self Consistent ◽  
Modelling Approach

Modelling approach that comprises a 2D self-consistent plasma model for discharge characterization in the first step and a 0D global plasma model for performance analysis in the second step.

Evaluation of the Hourly Global Solar Radiation on a Horizontal Plane for Two Sites in Algeria

2014 ◽  
Vol 925 ◽  
pp. 641-645 ◽  
Author(s):  
Mohamed Salmi ◽  
Hassen Bouzgou ◽  
Yarub Al-Douri ◽  
Abdelhakim Boursas
Keyword(s):  
Solar Radiation ◽  
Gaussian Distribution ◽  
Horizontal Plane ◽  
Experimental Validation ◽  
Global Solar Radiation ◽  
Distribution Model ◽  
Experimental Assessment ◽  
Precise Prediction ◽  
Gaussian Distribution Model ◽  
Modelling Approach

We present three models for the estimation of hourly global solar radiation for two sites in Algeria, namely: Djelfa (Latitude 34.68°N, Longitude 3.25°E, Altitude 1126 (m)) and Ain Bessem (Latitude 36.31°N, Longitude 3.67°E, Altitude 629 (m)). The models are: the Gaussian distribution model, the model by Collares-Pereira-RabI and the H.A. model (Hourly absolute modelling approach). The experimental assessment was done using recorded values of the hourly global solar radiation on a horizontal plane during the period 2000-2004. The obtained results show a close similarity between the solar radiation values calculated by the three models and the measured values, especially for the first model. The experimental validation shows promising results for the estimation and precise prediction of the hourly global solar radiation.

Lateral outward growth of single-crystal diamond by two different structures of microwave plasma reactors

CrystEngComm ◽  
2022 ◽  
Author(s):  
Wei Cao ◽  
Zhibin Ma ◽  
Hongyang Zhao ◽  
Deng Gao ◽  
Qiuming Fu
Keyword(s):  
Chemical Vapor Deposition ◽  
Single Crystal ◽  
Vapor Deposition ◽  
Microwave Plasma ◽  
Chemical Vapor ◽  
Lateral Growth ◽  
Plasma Reactors ◽  
Plasma Chemical ◽  
Plasma Chemical Vapor Deposition ◽  
Single Crystal Diamond

On a semi-open holder, the homoepitaxial lateral growth of single-crystal diamond (SCD) was carried out via microwave plasma chemical vapor deposition (MPCVD). By tuning and optimizing two different structures of...

scholarly journals Microwave Plasma Torch Generated in Argon for Small Berries Surface Treatment

2018 ◽  
Vol 8 (10) ◽  
pp. 1870 ◽  
Author(s):  
Todor Bogdanov ◽  
Ivan Tsonev ◽  
Plamena Marinova ◽  
Evgenia Benova ◽  
Krasimir Rusanov ◽  
...  
Keyword(s):  
Surface Wave ◽  
Plasma Torch ◽  
New Technologies ◽  
Microwave Plasma ◽  
Uv Light ◽  
Strong Electric Field ◽  
Surface Shape ◽  
Activity Measurements ◽  
Surface Decontamination ◽  
Fruit Surface

Demand for food quality and extended freshness without the use of harmful chemicals has become a major topic over the last decade. New technologies are using UV light, strong electric field, ozone and other reactive agents to decontaminate food surfaces. The low-power non-equilibrium (cold) atmospheric pressure operating plasmas effectively combines all the qualities mentioned above and thus, due to their synergetic influence, promising results in fruit surface decontamination can be obtained. The present paper focuses on the applicability of the recently developed microwave surface wave sustained plasma torch for the treatment of selected small fruit. Optical emission spectroscopy is used for the determination of plasma active particles (radicals, UV light) and plasma parameters during the fruit treatment. The infrared camera images confirm low and fully applicable heating of the treated surface that ensures no fruit quality changes. The detailed study shows that the efficiency of the microbial decontamination of selected fruits naturally contaminated by microorganisms is strongly dependent on the fruit surface shape. The decontamination of the rough strawberry surface seems inefficient using the current configuration, but for smooth berries promising results were obtained. Finally, antioxidant activity measurements demonstrate no changes due to plasma treatment. The results confirm that the MW surface wave sustained discharge is applicable to fruit surface decontamination.

THE OPTICAL PROPERTIES OF NITROGENATED AMORPHOUS CARBON FILMS GROWN BY A NOVEL SURFACE WAVE MICROWAVE PLASMA CVD METHOD

2004 ◽  
Vol 18 (18) ◽  
pp. 987-1001 ◽  
Author(s):  
M. RUSOP ◽  
S. ADHIKARI ◽  
A. M. M. OMER ◽  
S. ADHIKARY ◽  
H. UCHIDA ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Wave ◽  
Amorphous Carbon ◽  
Annealing Temperature ◽  
Microwave Plasma ◽  
Chemical Vapor ◽  
Carbon Films ◽  
Cvd Method ◽  
Wide Range ◽  
Bonding Properties

The effects of annealing temperature on the optical properties of nitrogenated amorphous carbon (a-C:N) films grown on quartz substrates by a novel surface wave microwave plasma chemical vapor deposition (SWMP-CVD) method are reported. The thickness, optical, structural and bonding properties of the as-grown and anneal-treated a-C:N films were measured and compared. The film thickness decreased rapidly with increasing annealing temperature above 350°C. A wide range of optical absorption characteristics is observed, depending on the annealing temperature. The optical band gap of as-grown a-C:N films is approximately 2.8 eV, gradually decreasing to 2.5 eV for the films anneal-treated at 300°C, and beyond that decreasing rapidly down to 0.9 eV at 500°C. The Raman and FTIR spectroscopy measurements have shown that the structural and composition of the films can be tuned by optimizing the annealing temperature. The change of optical, structural and bonding properties of SWMP-CVD-grown a-C:N films with higher annealing temperature was attributed to the fundamental changes in the bonding and band structures of the films.

Nonlinearity: Basis for self‐consistent modeling of surface wave produced plasmas in diffusion controlled regimes

1996 ◽  
Vol 3 (8) ◽  
pp. 3162-3175 ◽  
Author(s):  
Yu. M. Aliev ◽  
S. Grosse ◽  
H. Schlüter ◽  
A. Shivarova
Keyword(s):  
Surface Wave ◽  
Diffusion Controlled ◽  
Self Consistent
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