Method for fabricating exhaust gas decontamination reactor

Abstract

A method for fabricating an exhaust gas decontamination reactor, which is an exhaust gas decontamination pipe or a exhaust gas decontamination honeycombed structure, comprises steps: respectively coating a cathode layer and an anode layer on an outer wall surface and an inner wall surface of a pipe; and forming an enclosed reducing environment inside an internal channel of the pipe. The method for fabricating an exhaust gas decontamination honeycombed structure comprises steps: respectively coating cathode layers and anode layers on first inner wall surfaces of first passages and second inner wall surfaces of second passages; and forming enclosed reducing environments inside the second passages. Then, the cathode layers function as reaction sites to decontaminate exhaust gas. The present invention needn't arrange a reducing-gas system in the reactor and thus can decrease the volume and fabrication cost thereof.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an electrochemical-catalytic converter, particularly to a method for fabricating an exhaust gas decontamination pipe and an exhaust gas decontamination honeycombed structure.BACKGROUND OF THE INVENTION[0002]Fresh and clean air is essential for human health. Science and technology has promoted economical development. However, exhaust gas of vehicles and factories, especially motor vehicles and heavy industry factories, seriously pollutes the air.[0003]The emission standard of motor vehicles has been advanced persistently. However, the continuously increasing motor vehicles still bring about more and more serious air pollution. In a motor vehicle, the engine thereof burns fuel and converts chemical energy into mechanical energy. The burning process of fuel generates exhaust gases, including oxynitrides, carbon monoxide (CO), hydrocarbons (HC), and particulate matters, smoke, non-methane hydrocarbons (NMHC), and methane (CH4)...

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Benefits of technology

[0026]1. The exhaust gas decontamination reactor fabricated according to the present invention can merely use the cathode layers to decontaminate exhaust gas without using any additional reducing-gas system. Therefore, the method of the present invention is able to reduce the fabrication cost, and the exhaust gas decontamination reactor fabricated by the present invention is less likely to be damaged.

[0027]2. The present inventio

Problems solved by technology

However, exhaust gas of vehicles and factories, especially motor vehicles and heavy industry factories, seriously pollutes the air.

However, the continuously increasing motor vehicles still bring about more and more serious air pollution.

The burning process of fuel generates exhaust gases, including oxynitrides, carbon monoxide (CO), hydrocarbons (HC), and particulate matters, smoke, non-methane hydrocarbons (NMHC), and methane (CH4), which would form photochemical smog, deplete ozone, enhance the greenhouse effect, cause acid rain, damage the ecological environment and endanger human health.

Therefore, too high a concentration of carbon monoxide would degrade the capability of hemoglobin to transport oxygen.

Oxynitrides are also likely to combine with hemoglobin and would impair the breathing and circulating functions.

In the conventional exhaust gas emission control technology of oxygen-enriched combustion, none single device or converter can perform conversion of oxynitrides (

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