High-current gas discharge with a water-solution cathode as a source of plasma flow for gasification of carbon-containing waste

Abstract

© 2020 Institute of Physics Publishing. All rights reserved. A gas discharge with a water-solution cathode was experimentally studied in the current range 10-25 A. A bulk plasma was obtained in an extended (up to 20 cm) discharge gap. The choice of an aqueous solution of sodium chloride for use as a cathode was justified. The concentration range of an aqueous solution of sodium chloride was established to obtain a homogeneous bulk plasma. A plasma generator has been developed that allows the formation of a powerful plasma flow from the substance of a water-solution cathode. The possibility of supplying gaseous raw materials to an extended discharge gap in a plasma generator has been established. A technical system for the gasification of carbon-containing waste in two stages has been created. In the first stage, the waste was subjected to thermal degradation using an arc plasma, and in the second stage, the volatile components were converted to synthesis gas in a gas-discharge plasma with a water-solution cathode.