In this study we designed an RF plasma circuit. By using argon as plasma-forming gas, we investigated argon cold plasma plume at atmospheric pressure. Due to the tendency of transferring into arc mode after gas breakdown, resulting from the avalanche of electrons, we employed a glass tube as a dielectric barrier layer to inhibit the occurrence of the arc mode. We used an RF power supply at freq...

The actual technologies for the destruction of organo-halogenated substances are reviewed and compared with the emerging plasma processes based on the non transferred arc plasma torches. The associated costs are presented.

OBJECTIVE Plasma aldosterone concentration (PAC) to plasma renin activity (PRA) ratio is an established screening test for primary hyperaldosteronism. Due to the increased recognition of adrenal incidentalomas, reliable parameters are required. Determination of active renin concentration (ARC) in contrast to PRA offers advantages with regard to processing and standardization. The present study ...

Plasma generation by means of electrical discharge requires specialized power supply systems. The applicability plasma for various processes depends on its parameters, and these, in turn, depend the parameters Arc can be unstable, generating a lot electromagnetic interference, overvoltage overcurrent. system reactor must guarantee good control characteristics, immune to disturbances ensure coop...

We present in this paper a MHD modelling of the gliding arc behaviour of a DC plasma torch operating with air under low current and high voltage conditions. The low current leads to instabilities and difficulties to simulate the process because the magnetic field is not sufficient to constrict the arc. The model is 3D, time-dependent and the MHD equations are solved in using CFD software Code_S...

The conversion of atmospheric nitrogen into valuable compounds, that is, so-called nitrogen fixation, is gaining increased interest, owing to the essential role in the nitrogen cycle of the biosphere. Plasma technology, and more specifically gliding arc plasma, has great potential in this area, but little is known about the underlying mechanisms. Therefore, we developed a detailed chemical kine...

The plasma arc melting of mixtures oxygen-mayenite and solid-reductants (aluminum graphite) enables the scalable synthesis mayenite-based electrides with treatment times below one minute.

The atmospheric pressure carbon arc in inert gases is an important method for the production of nanomaterials [1]. Typical nanosynthesis arcs operate in a dc mode between a graphite anode, which is consumed, and a cathode which can be made from either graphite or a lower melting point material [2]. In spite of many studies, the basic physical processes in this discharge such as cathode electron...