Abstract: A gas conversion system using microwave plasma is provided. The system includes: a microwave waveguide; a gas flow tube passing through a microwave waveguide and configured to transmit microwaves therethrough; a temperature controlling means for controlling a temperature of the microwave waveguide; a temperature sensor disposed near the gas flow tube and configured to measure a temperature of gas flow tube or microwave waveguide; an igniter located near the gas flow tube and configured to ignite a plasma inside the gas flow tube so that the plasma converts a gas flowing through the gas flow tube during operation; and a plasma detector located near the gas flow tube and configured to monitor the plasma.

Abstract: A plasma generating system is provided. The plasma generating system includes: a pair of electrodes having distal ends; an electrode holder holding the pair of electrodes; a gate having a surface on which the electrode holder is slidably mounted and adapted to be controlled by sliding the electrode holder on the surface; and a resilient member secured to the gate and adapted to generate a force to close the opening. The distal ends are adapted to move into an opening of the gate as the electrode holder slides along a direction on the surface and adapted to generate an electric arc to thereby ignite plasma in a gas.