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Application of layered polymetallic hydroxides in the photochemical conversion of methane

A hydroxide and multi-metal technology is applied in the application field of layered multi-metal hydroxide in the photochemical conversion of methane, which can solve the problems of low conversion efficiency and complicated preparation, and achieve high conversion efficiency, green reaction process and environmental protection. friendly effect

Active Publication Date: 2021-07-20
PEKING UNIV +1
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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 new photochemical methane conversion material to overcome the defects of low conversion efficiency and complicated preparation of existing photochemical conversion materials

Method used

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  • Application of layered polymetallic hydroxides in the photochemical conversion of methane
  • Application of layered polymetallic hydroxides in the photochemical conversion of methane
  • Application of layered polymetallic hydroxides in the photochemical conversion of methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 6g of carbonamide, 3g of zinc nitrate hexahydrate, and 0.5g of isopropanol titanate into water, heat and stir at 90°C for 2 days, and wash the obtained white solid powder material Zn-Ti-LDH with distilled water. Characterized by scanning electron microscopy, the results showed that the material was nano-sized ( figure 1 ), X-ray crystallography characterization results show that it is a crystallized layered material ( figure 2 ), the infrared absorption spectrum test results show that the material has a large number of hydroxyl peaks, corresponding to Ti-OH and Zn-OH in the material, and there are corresponding to CO 3 2- The absorption peak ( image 3 ). According to relevant literature, the chemical composition of the synthetic material Zn-Ti-LDH is Zn 20 Ti 7 (OH) 54 (CO 3 ) 7 .

[0028] Take 0.2g Zn-Ti-LDH and evenly spread it on the surface of the quartz reactor. Fill the reactor with 5 mL (about 200 μmol) of methane gas, and irradiate the reactor with...

Embodiment 2

[0032] Under room temperature conditions, the reactor was irradiated with a 150W high-pressure mercury lamp for 10 minutes, and the rest were the same as in Example 1. The conversion rate is 4.5%, and the product composition is: ethylene 83.22%, ethane 1.75%, propylene 2.63%, propane 12.4%, butane<0.1%, and the rest is unreacted methane.

Embodiment 3

[0034] The reactor was irradiated with a 150W high-pressure mercury lamp for 3 hours at room temperature, and the rest was the same as in Example 1. The conversion rate is 13.6%, and the product composition is: ethylene 72.05%, ethane 2.41%, propane 1.71%, butane 23.8%, and the rest is unreacted methane.

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Abstract

The invention discloses the application of layered multimetal hydroxide in the photochemical conversion of methane. The photochemical coupling of methane is realized by using the layered multimetal hydroxide material, and methane can be converted into ethylene, ethane, propane and butane one or more of them. Compared with the traditional methane thermal conversion reaction, the invention realizes the photochemical conversion of methane at room temperature, avoids carbon deposition, increases the stability of the material, and can be recycled; compared with the existing methane photochemical conversion reaction, The invention can obtain one or more of higher hydrocarbons such as ethane, ethylene, propane or butane, and has high conversion efficiency and adjustable product types. The methane photochemical conversion method of the invention has a green reaction process, is environmentally friendly, and has practical industrialization prospects.

Description

technical field [0001] The invention belongs to the technical field of methane photochemical conversion, and in particular relates to the application of a layered multi-metal hydroxide in the aspect of methane photochemical conversion. Background technique [0002] As the main component of natural gas, methane is an important gas deposit, and the proven reserves in the world are as high as 150.19×10 12 m 3 . However, the carbon-hydrogen bonds of methane molecules are extremely stable, difficult to break, and difficult to produce controllable chemical reactions, so they are not suitable for use as raw materials in the chemical industry. Currently, methane is mainly used as fuel. In terms of industrial production, reforming methane and water vapor into synthesis gas (CO and H 2 ), and as a raw material for the synthesis of ammonia, etc. Although thermocatalytic methane oxidative coupling to prepare ethylene has been extensively studied and achieved some results, thermocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232B01J23/06B01J23/08B01J23/755C07C2/76C07C11/04C07C11/06C07C9/08C07C9/06
CPCB01J23/007B01J23/06B01J23/08B01J23/755B01J27/232B01J35/0013B01J35/004C07C2/76C07C2523/06C07C2523/08C07C2523/755C07C2527/232C07C11/04C07C11/06C07C9/08C07C9/06Y02P20/52
Inventor 曹洋赵玉王宏刚孙洋莫凡洋
Owner PEKING UNIV