Reactor and method for preparing methanol by directly oxidizing methane through gas-solid phase continuous photocatalysis

Abstract

The invention relates to a reactor and a method for preparing methanol through gas-solid phase continuous photocatalytic direct oxidation of methane, a cylindrical reactor main body is arranged on a bottom plate, a reaction plate is arranged in the middle of the reactor main body, a light-transmitting sheet is arranged on the reactor main body above the reaction plate, and a reaction cavity is formed between the reaction plate and the light-transmitting sheet; a gas inlet channel and a gas outlet channel which are communicated with the reaction cavity are processed on the reactor main body; an annular cover plate is connected to the reactor main body above the light-transmitting sheet; a certain amount of catalyst powder is laid in a catalyst filling area, an in-situ pressing mold is used for pressing the catalyst powder, under the reaction conditions of low temperature and normal pressure, mixed gas of methane and oxidizing gas enters a reaction cavity and makes contact with the catalyst under illumination to react, and the reacted mixed gas is condensed to separate out methyl alcohol. The device has the advantages that the catalytic efficiency is high, and the catalyst is easy to unload and recycle and easy to clean.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction equipment, and particularly relates to a reactor and a method for producing methanol by gas-solid continuous photocatalytic direct oxidation of methane. Background technique [0002] Methane is the main component of carbon-containing resources such as natural gas, shale gas, coalbed methane, and combustible ice. It has considerable reserves around the world. In addition to being directly used as fuel, it can also be used as a raw material to synthesize high value-added products. Methanol is an important basic chemical raw material and can also be used as a clean fuel. It is the most ideal product for methane conversion and retains most of the energy of methane. Converting methane into methanol is conducive to the efficient utilization of methane resources, and at the same time solves the problem of high storage and transportation costs of gaseous methane, which is one of the most attract...

AI Technical Summary

Problems solved by technology

[0005] The photoreactor is the core equipment of the photocatalytic reaction process. However, the development of the reactor related to the gas-solid phase photocatalytic direct oxidation of methane to methanol lags behind the research and development of photocatalysts.

At present, the reactors used for the gas-solid phase photocatalytic direct oxidation of methane to methanol mainly include fluidized bed photoreactors and fixed bed photoreactors. The effective utilization area of ​​the catalyst is improved, but the catalyst recovery and post-processing are difficult, the reusability is poor, and the light distribution in the reactor is uneven

(2) Although the fixed bed photoreactor solves the problem of catalyst recovery and reuse, it has disadvantages such as small effective catalytic area, low mass and heat transfer efficiency, and difficult control of bed temperature.

(3) At present, the fluid channels in the photoreactor are all in the conventional scale, and there are inevitably disadvantages such as limited heat and mass transfer, limited photon transmission, large reactor volume, and small processing capacity.

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