Secondary-coupling microwave plasma reforming device

Abstract

The invention discloses a secondary-coupling microwave plasma reforming device, which comprises a cylindrical cavity body, an annular waveguide, a microwave plasma reaction tube, a coupling device and an ignition electrode, wherein the annular waveguide surrounds the central position of the cavity body for dividing the cavity body into a cylindrical resonant cavity located in the central position and an external annular reaction cavity, and the annular waveguide is provided with multiple symmetrical and uniformly-distributed coupling windows in the circumferential direction; the microwave plasma reaction tube is arranged in the center of the annular reaction cavity, and mixed gases enter the microwave plasma reaction tube; the coupling device is a quarter-wavelength resonant cavity coupling device and is arranged inside the resonant cavity; and the ignition electrode comprises two metal wires and is connected with a high-voltage power supply and arranged at the gas inlet port of the microwave plasma reaction tube, microwave energy can enter the cylindrical resonant cavity via the coupling device and then enter the annular reaction cavity via the coupling windows, coupling at multiple ports is carried out at the same time, the coupling efficiency is high, and the microwave energy can be distributed more uniformly in the reaction cavity.

Description

technical field [0001] The invention relates to the field of microwave plasma, in particular to a secondary coupling microwave plasma reforming device. Background technique [0002] The microwave plasma reforming device uses microwaves to excite the combustible mixed gas to generate plasma, and through the plasma to promote the reforming reaction of the combustible mixed gas to generate hydrogen-rich gas, which has the advantages of high reaction yield and no need for catalysts. The mechanism of the plasma reforming reaction is to use the high-energy electrons in the plasma to impact the neutral particles in the plasma, so that the neutral particles are cracked to generate active groups (groups). Atomic nuclei or positive ions recombine to form new molecular or atomic structures. Conventional chemical reactions that are difficult to achieve or require expensive heavy metals as catalysts can be easily achieved through plasma reforming reactions. Therefore, the plasma reform...

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Problems solved by technology

Since the plasma can be regarded as a magnetic fluid in the microwave, it has a great influence on the impedance of the reaction chamber. It is generally difficult to achieve impedance matching for two different states simply by matching the impedance of the reaction chamber.

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