Photocatalytic reactor for increasing photocatalytic degradation rate of methane and application of photocatalytic reactor

Abstract

The invention discloses a photocatalytic reactor for increasing the photocatalytic degradation rate of methane. The photocatalytic reactor comprises a reactor body with an upper opening, a reactor cover plate, an ultraviolet light source and a quartz coil capable of loading a photocatalyst for photocatalytic degradation of methane, wherein the reactor cover plate can be movably connected with the upper opening of the reactor body in a sealing way, the bottom of the reactor body with the upper opening is provided with an air inlet, and the reactor cover plate is provided with an air outlet; the quartz coil is vertically arranged inside the reactor body, one end of the quartz coil is connected with a water inlet arranged in the side wall of the reactor body, and the other end of the quartz coil is connected with a water outlet arranged in the side wall of the reactor body; the ultraviolet light source is arranged inside the reactor body, and the quartz coil is used for surrounding the ultraviolet light source. The photocatalytic reactor can realize the methane conversion ratio up to 71.5mg / (m<3>.min) under the condition of continuous light and has the characteristics of high catalytic efficiency and low conversion cost.

Description

technical field [0001] The invention relates to a photocatalytic reactor for improving the photocatalytic degradation rate of methane and its application in photocatalytic methane degradation. Background technique [0002] Methane is a potent greenhouse gas with high global warming potential (GWP). 3 The dissociation energy of the —H bond is 435 kJ / mol, and its chemical properties are very stable and difficult to transform. [0003] Photocatalytic technology is a new technology developed in the 1970s, which can effectively and completely remove greenhouse gases. Photocatalytic technology generally utilizes ultraviolet light source to irradiate semiconductor catalysts with photocatalytic activity, such as titanium dioxide (TiO 2 ) etc., where TiO 2 It has become an ideal photocatalytic material due to its non-toxicity, good chemical stability, strong oxidation ability and no secondary pollution. TiO 2 The principle of photocatalytic degradation of methane under ultraviol...

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Problems solved by technology

[0009] One of the purposes of the present invention is to solve the above-mentioned photocatalytic decomposition of methane in the continuous light methane degradation rate is low, and under frequent intermittent light, although the methane degradation rate is high, but the frequent intermittent light makes the service life of the ultraviolet lamp low. Provide a photocatalytic reactor that can improve the photocatalytic degradation rate of methane. When the photocatalytic reactor is used for photocatalytic degradation of methane, it can achieve a high degradation rate of methane under the continuous illumination of a low-pressure mercury lamp, thereby avoiding intermittent illumination During the process, the technical problem of low service life of the UV lamp due to frequent intermittent light

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