Abstract

Microwave discharges in dielectric liquids are a relatively new area of plasma physics and plasma application. This review cumulates results on microwave discharges in wide classes of liquid hydrocarbons (alkanes, cyclic and aromatic hydrocarbons). Methods of microwave plasma generation, composition of gas products and characteristics of solid carbonaceous products are described. Physical and chemical characteristics of discharge are analyzed on the basis of plasma diagnostics and 0D, 1D and 2D simulation.

Highlights

  • Electrical discharges in liquids [1,2,3,4,5,6,7,8,9,10] and, in particular, microwave discharges [11,12,13] have been intensively studied

  • It is known that MW discharges in liquid hydrocarbons are accompanied by formation of nanosize carbon-containing particles and the liquid becomes saturated with black particles and loses its transparency both for microwaves and light

  • Various methods have been developed for producing microwave discharges in liquids

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Summary

Introduction

Electrical discharges in liquids [1,2,3,4,5,6,7,8,9,10] and, in particular, microwave discharges [11,12,13] have been intensively studied. The surface of the bubbles is located near the high-temperature plasma zone, which ensures a high-rate input of evaporated molecules of fluids in the bubble. This bubble can be considered as a mini plasma chemical reactor. The small dimension of plasma region produces high gradients of parameters and high rate of stabilization of products. These features are the major differences from conventional gas phase microwave plasma processing. In the process of burning a discharge in liquid hydrocarbons, one of the products is a solid carbon-containing phase, which naturally increases the loss tangent. In the process of burning a discharge in hydrocarbons, solid particles appearing in a liquid reduce its transparency

Experimental Setups and Methods of Diagnostics
Solid Products of Microwave Discharges in Liquid Hydrocarbons
Modeling
Modeling of Carbonaceous Particle Growth
Conclusions
Findings
Patents
Full Text
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