Method for using catalysts in microwave field

Abstract

The invention discloses a method of using catalysts in a microwave field. According to the method of the invention, a metal net, solid catalysts and a spot welding machine are employed; the metal netwraps the outer surfaces of the solid catalysts; and the spot welding machine welds the metal net to fix the metal net into a plate-shaped material which then can be directly installed in a microwavecavity of waste gas treatment equipment. According to the invention, a traditional photocatalyst, a traditional thermal catalyst and carriers thereof are packaged in the metal net which is then fixedin the microwave ultraviolet waste gas treatment cavity; since the metal net can reflect microwaves, the catalysts cannot absorb microwave energy and are thus prevented from ignition or combustion; meanwhile, irradiation of ultraviolet light and passing of airflow are not affected, so the selection range of catalysts, carriers and carrier bed materials in the microwave field can be greatly widened, and equipment manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of exhaust gas treatment, and in particular relates to a method for using a catalyst in a microwave field. Background technique [0002] Microwave energy has been generally recognized as a high efficiency. Huang Kama and others have done a series of researches for a long time, and believe that microwaves can change the interaction between molecules, significantly increase the speed of some chemical reactions and change the reaction mechanism, and have "special effects". Zhang Tao and others used microwave discharge to treat NO-containing gas, and achieved good denitrification effect. Tang Junwang used Fe / ZSM-5 catalyst for denitrification research under microwave heating mode and conventional heating mode. The results showed that microwave heating can make the reaction that could not be catalytically decomposed really happen. Because microwave heating is body heating from the inside out, it has the charact...

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Problems solved by technology

[0003] In the process of exhaust gas treatment, in order to speed up the reaction rate, suitable catalysts are usually used to promote catalytic degradation of pollutants, but catalysts that can undergo catalytic degradation reactions in microwave fields require special carriers, loading methods, and bed materials. It is impossible to directly put traditional activated carbon, activated alumina or molecular sieve solid catalysts into the microwave field for catalytic degradation of exhaust gas pollutants

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