Synthesis and regeneration of catalysts in electric arc plasma

1997 ◽  
Vol 70 (4) ◽  
pp. 605-608
Author(s):  
G. P. Vissokov
Keyword(s):  
Electric Arc ◽  
Arc Plasma

Plasma parameters in atomic-emission spectral analysis of phosphate concentrates of the fission products

2019 ◽  
Vol 85 (2) ◽  
pp. 17-22
Author(s):  
M. I. Khamdeev ◽  
E. A. Erin
Keyword(s):  
Spectral Analysis ◽  
Chemical Composition ◽  
Reference Materials ◽  
Fission Products ◽  
Atomic Emission ◽  
Electric Arc ◽  
Physical Parameters ◽  
Arc Plasma ◽  
Atomic Emission Spectral Analysis ◽  
Excitation Processes

Physical parameters of electric arc plasma as well as their time dependences are calculated when analyzing phosphate precipitates of the fission products of irradiated nuclear fuel. Phosphate concentrates of the fission products are known for their complex chemical composition and high thermal and chemical stability. Hence, direct atomic emission spectral analysis of phosphate powders without transferring them into solutions is advisable. Different conditions of sample preparation and synthesis of the reference materials determine the different chemical forms of the elements to be determined. This, in turn, affects the kinetics of their evaporation in the electrode crate and excitation processes in the plasma. The known mechanisms of those processes cannot always be transferred to specific conditions of the given method of analysis thus entailing the necessity of studying the effect of the samples chemical composition on the results of determination, proper choice of spectroscopic carriers, detailed study of spectra excitation processes in spectral analysis, and analysis of the physical parameters of the electric arc plasma. We used the lines Zn I 307.206 nm and Zn I 307.589 nm to measure the effective temperature of the central hot sections of the arc in a range of4500 - 6500 K. NaCl, BaCl2 and NaCl + T1C1 were studied to reduce the effect of the sample elemental composition on excitation conditions of the spectra and their stabilization as a spectroscopic carrier. In control experiments we used carrier-free samples. The coincidence of the values of the plasma physical parameters within the measurement error not exceeding 20%, as well as the identity of the nature of the kinetic curves for samples of phosphate precipitates and synthetic reference materials prove their correctness. The result of the study substantiate correctness of the direct atomic-emission spectral procedure in analysis of phosphate concentrates of fission when using synthetic reference materials.

Recent Advances in Electric Arc Plasma Generation Technology

ARS Journal ◽  
1961 ◽  
Vol 31 (1) ◽  
pp. 4-17 ◽  
Author(s):  
RICHARD R. JOHN ◽  
WILLIAM L. BADE
Keyword(s):  
Electric Arc ◽  
Arc Plasma ◽  
Plasma Generation ◽  
Recent Advances ◽  
Generation Technology

Electric Arc Plasma Unit with Controlled Electric Arc for Surface Treatment of Metal Products

2021 ◽  
Author(s):  
Viktor Meshcheryakov ◽  
Vladimir Pikalov ◽  
Stanimir Valtchev
Keyword(s):  
Surface Treatment ◽  
Electric Arc ◽  
Arc Plasma ◽  
Metal Products ◽  
Plasma Unit

To the Question of Studying the Regimes of Electro-Plasma Processing of Technogenic Wastes of Incineration Plants of the PRC for the Production of Melt and Fibrous Materials

2019 ◽  
Vol 945 ◽  
pp. 1001-1008
Author(s):  
S.L. Buyantuev ◽  
A.S. Kondratenko ◽  
S.A. Blagochinnov
Keyword(s):  
Specific Energy Consumption ◽  
Waste Incineration ◽  
Electric Arc ◽  
Gas Content ◽  
Arc Plasma ◽  
Fibrous Materials ◽  
Insulating Materials ◽  
X Ray ◽  
Ash Melting ◽  
Technogenic Wastes

The article presents the results of melting industrial waste incineration plants in China in electric arc plasma and demonstrated the possibility of melting the wastes in podrihtovali for production of a melt and producing fibrous materials based on it.Studies were carried out by optical and electron microscopy, spectral and x-ray analysis, as well as by capillary electrophoresis to determine the cation-anion composition. For processing of ash the electromagnetic technological reactor in which its melting was made was used. The presented melting unit made it possible to smoothly regulate the temperature and keep it at the outlet of the jet from the Letka, which made it possible to reduce the power consumption for the production of melt and fiber production. The experiments on melting showed a high gas content in the process of melting of the waste. Therefore, initially, to study the possible composition of the gas, the TERRA program modeling the process of ash melting with the release of gas was used, and the reactor parameters were calculated to determine the effective power and specific energy consumption. Thus, the purpose of the tasks was to obtain a homogeneous melt with associated purification of waste gases, followed by an analysis of its material composition, as well as the production of a thin mineral fiber to produce heat-insulating materials of the fibrous structure.

Chemical preparation of ultra-fine aluminium oxide by electric arc plasma

1981 ◽  
Vol 16 (6) ◽  
pp. 1716-1719 ◽  
Author(s):  
G. P. Vissokov ◽  
K. D. Manolova ◽  
L. B. Brakalov
Keyword(s):  
Aluminium Oxide ◽  
Electric Arc ◽  
Arc Plasma ◽  
Chemical Preparation

Thermal-shock performance of evaporated Al2O3, ZrO2, and laminated cermet coatings in an electric-arc plasma source

1976 ◽  
Vol 31 (3) ◽  
pp. 1040-1043
Author(s):  
V. S. Leshchenko ◽  
V. G. Novikov ◽  
A. V. Petrov ◽  
A. D. Sukhobokov ◽  
E. A. Turkin
Keyword(s):  
Thermal Shock ◽  
Plasma Source ◽  
Electric Arc ◽  
Arc Plasma ◽  
Cermet Coatings

Determination of the characteristics of an electric arc plasma contaminated by vapors from insulators

1991 ◽  
Vol 19 (1) ◽  
pp. 1-8 ◽  
Author(s):  
M. Abbaoui ◽  
B. Cheminat
Keyword(s):  
Electric Arc ◽  
Arc Plasma

Chipboards with Plasma Protective Decorative Coatings

2019 ◽  
Vol 974 ◽  
pp. 90-95 ◽  
Author(s):  
Nadezhda I. Bondarenko ◽  
Sergey A. Chuev ◽  
Ludmila A. Dogaeva ◽  
Tatiana A. Jalovencko
Keyword(s):  
Chemical Modification ◽  
Sheet Glass ◽  
Intermediate Layer ◽  
Liquid Glass ◽  
Front Surface ◽  
Electric Arc ◽  
Alkali Resistance ◽  
Arc Plasma ◽  
Plasma Chemical ◽  
Decorative Coating

A plasma technology has been developed for the production of chipboard with vitreous protective decorative coatings. To prevent high temperatures of the plasma jet from being applied to the front surface of the chipboard, an intermediate layer was applied, which included a mixture of sodium liquid glass with colored glass powders based on profiled and sheet cullet. The technology of a two-stage deposition of an intermediate layer before plasma spraying of the main vitreous coating has been developed. The technology provides for the preliminary front surface preparation and the liquid glass application on a wood chipboard, the intermediate layer application and subsequent drying at 95 °C. The adhesion strength of the intermediate layer with the matrix was 1.6–1.8 MPa. The optimal technological parameters of plasma-chemical modification of a protective decorative coating based on fine powders of sheet and profiled glasses have been established: the power of an electric arc plasma installation operation is 8 kW, the flow rate of argon plasma gas - 2.0 m3 /hour. It is shown that the water resistance of protective decorative coatings based on profiled and sheet glass is III hydrolytic class. Vitreous coatings had high reliability and durability, in particular, acid resistance, alkali resistance and microhardness. Due to the electric arc plasma installations use for plasma-chemical modification of protective decorative coatings based on profiled and sheet glass cullet, the technology is resource and energy efficient, and is also recommended for introduction both in furniture industry and in the construction industry.

scholarly journals Properties of Al2O3 coatings obtained by electric arc plasma method in “dynamic vacuum”

2020 ◽  
Vol 1588 ◽  
pp. 012033
Author(s):  
A V Mordynsky ◽  
M Kh Gadzhiev ◽  
A S Tyuftyaev ◽  
V M Gusev ◽  
T I Borodina
Keyword(s):  
Electric Arc ◽  
Arc Plasma ◽  
Dynamic Vacuum ◽  
Plasma Method

Chemical preparation of ultra-fine aluminium oxide by electric arc plasma

1981 ◽  
Vol 16 (6) ◽  
pp. 1716-1719 ◽  
Author(s):  
G. P. Vissokov ◽  
K. D. Manolova ◽  
L. B. Brakalov
Keyword(s):  
Aluminium Oxide ◽  
Electric Arc ◽  
Arc Plasma ◽  
Chemical Preparation
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