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Method for preparing methanol through photocatalytic oxidation of methane

A photocatalytic oxidation and methane technology, applied in the chemical industry, can solve the problems of low single-pass conversion rate, complex process and high investment, and achieve the effects of simple process, simple preparation and low investment

Inactive Publication Date: 2015-06-17
裴振昭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing methanol by photocatalytic oxidation of methane, so as to solve the defects of high equipment investment, complicated process, large energy consumption and low single-pass conversion rate of the traditional method for preparing methanol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 5-10ml butyl titanate, 30ml water and 5-10g carrier SiO 2 (particle size is 0.355 ~ 0.675mm, average pore size is 10nm) into the reaction kettle, then add a certain concentration of sodium tungstate aqueous solution, stir evenly, seal, react at 120°C for 10h, wait for the reaction system to cool to room temperature, alcohol, water Each was washed three times, dried at 80°C, and then calcined and activated in a muffle furnace at 450°C for 2 hours.

[0022] The photocatalytic oxidation of methane to prepare methanol was carried out in a fixed-bed photochemical reactor, with a high-pressure mercury lamp (500W) as the light source (linear light source), and the photocatalyst prepared above was evenly placed in the middle of the fixed-bed reactor. , feed methane and air in a certain proportion, and raise the temperature to 50°C, and carry out irradiation reaction after reaching the adsorption equilibrium. After a period of time, the conversion rate of methane can reach 8...

Embodiment 2

[0024] Mix 5-10ml butyl titanate, 30ml water and 5-10g carrier SiO 2 (particle size is 0.355 ~ 0.675mm, average pore size is 10nm) into the reaction kettle, then add a certain concentration of ferric nitrate aqueous solution, stir evenly, seal, react at 140°C for 10h, wait for the reaction system to cool to room temperature, alcohol, water Wash 3 times, dry at 80°C, and then activate by calcining at 450°C for 2 hours in a muffle furnace.

[0025] The photocatalytic oxidation of methane to prepare methanol was carried out in a fixed-bed photochemical reactor, with a high-pressure mercury lamp (500W) as the light source (linear light source), and the photocatalyst prepared above was evenly placed in the middle of the fixed-bed reactor. , feed methane and air in a certain proportion, and raise the temperature to 60°C, and carry out irradiation reaction after reaching adsorption equilibrium. After a period of time, the conversion rate of methane can reach 88%.

Embodiment 3

[0027] Mix 5-10ml titanium trichloride, 30ml water and 5-10g carrier SiO 2 (particle size is 0.355 ~ 0.675mm, average pore size is 10nm) into the reaction kettle, then add a certain concentration of ferric nitrate aqueous solution, stir evenly, seal, react at 140°C for 10h, wait for the reaction system to cool to room temperature, alcohol, water Wash 3 times, dry at 80°C, and then activate by calcining at 450°C for 2 hours in a muffle furnace.

[0028] The photocatalytic oxidation of methane to prepare methanol was carried out in a fixed-bed photochemical reactor, with a high-pressure mercury lamp (500W) as the light source (linear light source), and the photocatalyst prepared above was evenly placed in the middle of the fixed-bed reactor. , feed methane and air in a certain proportion, and raise the temperature to 70°C, and carry out irradiation reaction after reaching the adsorption equilibrium. After a period of time, the conversion rate of methane can reach 90%.

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Abstract

The present invention relates to a method for preparing methanol through photocatalytic oxidation of methane, and belongs to the technical field of chemical industry. The method is characterized in that the method is performed in a fixed bed photochemical reactor, a high pressure mercury lamp is adopted as a light source (linear light source), a SiO2 loaded semiconductor photocatalyst prepared through a hydrothermal method is uniformly placed in the middle portion of the fixed bed reactor, methane and air are introduced according to a certain ratio under a normal pressure, heating is performed to achieve a set temperature (50-70 DEG C), and an irradiation reaction is performed after achieving the adsorption equilibrium. The method of the present invention has advantages of simple process, low investment, low energy consumption, high conversion rate and the like.

Description

field of invention [0001] The invention relates to a method for preparing methanol by photocatalytic oxidation of methane, which belongs to the technical field of chemical industry. Background technique [0002] Methanol is a very important basic chemical product and chemical raw material. The raw material for methanol synthesis in China mainly comes from methane. The main component of coalbed methane is methane, and methane can not only be used as fuel, but also a major greenhouse gas. Recycling and reusing methane in coalbed methane not only reduces the harm of methane to the environment, but also alleviates the energy crisis to a certain extent. . [0003] The domestic production of methanol from methane mainly adopts the traditional and relatively mature two-step method: that is, the reaction of methane and water vapor to generate synthesis gas, and then the synthesis gas to generate methanol. This process requires high equipment, high energy consumption, and low conv...

Claims

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Application Information

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IPC IPC(8): C07C31/04C07C29/50B01J23/30B01J23/745
CPCY02P20/52C07C29/50B01J23/30B01J23/745C07C31/04
Inventor 裴振昭
Owner 裴振昭
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