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Preparation method of catalyst for preparing methanol by low-temperature plasma-optical coupling methane and method for preparing methanol

A low-temperature plasma and catalyst technology, which is used in oxidation reaction preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low yield and harsh conditions, and achieve the effects of increasing yield, inhibiting decomposition, and being easy to activate.

Active Publication Date: 2020-11-24
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Defects and deficiencies of the existing technology: In the traditional thermal catalytic methane to methanol technology, the r

Method used

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  • Preparation method of catalyst for preparing methanol by low-temperature plasma-optical coupling methane and method for preparing methanol

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Put Cu(NO 3 ) 2 ·3H 2 10 g of O and 5 g of BTC (trimellitic acid) were dissolved in a mixed solution of deionized water (83.3 mL), ethanol (83.3 mL) and DMF (83.3 mL), and magnetically stirred at room temperature for 30 min. The uniformly mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene and crystallized at 80°C for 24 hours. The product was filtered and washed, and soaked in DMF for 3 days. DMF was changed every 12 hours to remove residual reagents. The samples were soaked in acetone for 3 days at room temperature, and the acetone was changed every 12 hours. After filtering the solid, it was dried overnight at 80° C. to obtain a Cu-C precursor. Then the Cu-C precursor was pyrolyzed in flowing nitrogen at 400° C. for 3 h, and naturally cooled to obtain a Cu-C catalyst, which was denoted as Cu-C-400.

Example Embodiment

[0027] Example 2

[0028] Put Cu(NO 3 ) 2 ·3H 2 10 g of O and 5 g of BTC (trimellitic acid) were dissolved in a mixed solution of deionized water (83.3 mL), ethanol (83.3 mL) and DMF (83.3 mL), and magnetically stirred at room temperature for 30 min. The uniformly mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene and crystallized at 80°C for 24 hours. The product was filtered and washed, and soaked in DMF for 3 days to remove residual reagents. The samples were soaked in acetone for 3 days at room temperature and replaced every 12 hours. After filtering the solid, it was dried overnight at 80° C. to obtain a Cu-C precursor. Then, the Cu-C precursor was pyrolyzed in flowing nitrogen at 500° C. for 3 h, and cooled naturally to obtain a Cu-C catalyst, which was denoted as Cu-C-500.

Example Embodiment

[0029] Example 3

[0030] Put Cu(NO 3 ) 2 ·3H 2 10 g of O and 5 g of BTC (trimellitic acid) were dissolved in a mixed solution of deionized water (83.3 mL), ethanol (83.3 mL) and DMF (83.3 mL), and magnetically stirred at room temperature for 30 min. The uniformly mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene and crystallized at 80°C for 24 hours. The product was filtered and washed, and soaked in DMF for 3 days to remove residual reagents. The samples were soaked in acetone for 3 days at room temperature and replaced every 12 hours. After filtering the solid, it was dried overnight at 80° C. to obtain a Cu-C precursor. Then the Cu-C precursor was pyrolyzed in flowing nitrogen at 600° C. for 3 h, and naturally cooled to obtain a Cu-C catalyst, which was denoted as Cu-C-600.

[0031] The following is an example of low-temperature plasma-optical coupling of methane to methanol.

[0032] The catalysts prepared in Examples 1-3 were e...

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Abstract

The invention provides a preparation method of a catalyst for preparing methanol by low-temperature plasma-optical coupling methane and a method for preparing methanol. The method comprises the following steps: adding 0-20mg of a Cu-C catalyst into 1-5mL of water, carrying out uniform ultrasonic dispersion so as to obtain a mixed solution, pouring the mixed solution into a DBD reactor, and carrying out a reaction under normal temperature and normal pressure so as to obtain the methanol wherein the flow rate of CH4 is 5-30mL/min, and the discharge power is 5-50W. According to the method, low-temperature plasma is adopted to catalyze CH4 and H2O to prepare methanol through one-step conversion, H2O which is low in price and easy to obtain is selected as an oxidizing agent, excessive oxidationof CH4 is restrained, H2O can serve as an absorbent, generated CH3OH is transferred into a liquid phase in time, and decomposition of products is effectively restrained. As the plasma can generate high-energy electrons, CH4 can be activated at normal temperature and normal pressure, and harsh reaction conditions are avoided.

Description

technical field [0001] The invention relates to the technical field of catalytic reaction, in particular to a preparation method of a low-temperature plasma-optical coupling methane-to-methanol catalyst and a method for preparing methanol. Background technique [0002] Methane (CH 4 ) is the main component of natural gas and biogas, and its content is abundant. Due to the high transportation cost of methane in use, the direct use of methane becomes uneconomical. Therefore, converting methane into liquid fuels and chemicals has higher economic value. Moreover, methanol is an important raw material in chemical production, so it is preferred to oxidize methane into methanol. At present, the mature route from methane to methanol in industry is the synthesis gas route. In the first step, methane is reacted with water vapor to obtain synthesis gas, and in the second step, the synthesis gas is reacted to produce methanol. However, this process requires high temperature (450-55...

Claims

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Application Information

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IPC IPC(8): B01J23/72C07C29/48C07C31/04
CPCB01J23/72C07C29/48C07C31/04Y02P20/52
Inventor 代成义毕文菲李雪梅张梦寒
Owner NORTHWEST UNIV
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