A kind of preparation method of the copper-cobalt base catalyst that is used for synthesis gas to make low-carbon alcohol

A catalyst and low-carbon alcohol technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of low alcohol selectivity and low activity, and achieve high activity, simple process, and high load. dispersion effect

Active Publication Date: 2022-04-29
XI'AN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a copper-cobalt-based catalyst for producing low-carbon alcohols from syngas, which solves the problems in the prior art that the activity of the copper-cobalt-based catalyst used in the preparation of low-carbon alcohols is low and the alcohol selectivity is not high

Method used

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  • A kind of preparation method of the copper-cobalt base catalyst that is used for synthesis gas to make low-carbon alcohol
  • A kind of preparation method of the copper-cobalt base catalyst that is used for synthesis gas to make low-carbon alcohol
  • A kind of preparation method of the copper-cobalt base catalyst that is used for synthesis gas to make low-carbon alcohol

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Embodiment 1

[0041] A kind of preparation method of the copper-cobalt-based catalyst that is used for the synthesis gas system low-carbon alcohol of the present invention is specifically implemented according to the following steps:

[0042] Step 1, heat the carbon nanotubes in concentrated nitric acid to 80°C, reflux for 5h, filter and wash until neutral, dry in an oven at 110°C for 10h overnight, then grind, and sieve with a 200-mesh sieve, Then vapor-coated on carbon paper, and dried naturally to obtain the cathode electrode material;

[0043] Among them, the steam coating process is as follows: Weigh 0.053g of phenolic resin and 0.064g of polyvinylidene fluoride, add them to 22ml of N,N-dimethylacetamide, carry out ultrasonic vibration in a water bath at 40°C for 20min, and then add 0.3g of After the treatment of carbon nanotubes, continue to ultrasonically vibrate for 10 minutes to obtain a mixed solution, and then use a titanium plate with a size of 12 × 12 cm to place it above a con...

Embodiment 2

[0054] A kind of preparation method of the copper-cobalt-based catalyst that is used for the synthesis gas system low-carbon alcohol of the present invention is specifically implemented according to the following steps:

[0055] Step 1 is identical with embodiment 1;

[0056] Step 2, add anhydrous copper sulfate, cobalt sulfate heptahydrate, sodium citrate and sodium sulfate in 1L of deionized water, stir well to obtain solution a, and then use sulfuric acid solution or sodium hydroxide solution to adjust the pH value of solution a to 4.5, after adjustment, place solution a in a constant temperature water bath at a temperature of 50°C to obtain an electrolyte;

[0057] Wherein, the concentration of the anhydrous copper sulfate in solution a is 5g / L, the concentration of cobalt sulfate heptahydrate is 40g / L, the concentration of sodium citrate is 50g / L and the concentration of sodium sulfate is 20g / L;

[0058] Step 3, place the cathode electrode material and anode electrode ma...

Embodiment 3

[0064] A kind of preparation method of the copper-cobalt-based catalyst that is used for the synthesis gas system low-carbon alcohol of the present invention is specifically implemented according to the following steps:

[0065] Step 1 is identical with embodiment 1;

[0066] Step 2, add anhydrous copper sulfate, cobalt sulfate heptahydrate, sodium citrate and sodium sulfate in 1L of deionized water, stir well to obtain solution a, and then use sulfuric acid solution or sodium hydroxide solution to adjust the pH value of solution a to 4.5, after adjustment, place solution a in a constant temperature water bath at a temperature of 50°C to obtain an electrolyte;

[0067] Wherein, the concentration of the anhydrous copper sulfate in solution a is 5g / L, the concentration of cobalt sulfate heptahydrate is 40g / L, the concentration of sodium citrate is 40g / L and the concentration of sodium sulfate is 20g / L;

[0068] Step 3, place the cathode electrode material and anode electrode ma...

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Abstract

The invention discloses a preparation method of a copper-cobalt-based catalyst for producing low-carbon alcohols from syngas, specifically implemented according to the following steps: step 1, placing carbon nanotubes in concentrated nitric acid for treatment, and then vapor-coating them on carbon paper, Dry naturally to obtain the cathode electrode material; step 2, add anhydrous copper sulfate, cobalt sulfate heptahydrate, sodium citrate and sodium sulfate in the ionized water, stir evenly to obtain solution a, then adjust the pH value, adjust the rear In a constant temperature water bath, the electrolyte is obtained; step 3, the cathode electrode material and the anode electrode material are placed in the electrolyte, connected with a numerical control constant current electroplating power supply, and electrolyzed to obtain a copper-cobalt-based catalyst sample; step 4, The copper-cobalt-based catalyst sample is rinsed into a container, dried, roasted, pressed into tablets, ground and sieved to obtain the copper-cobalt-based catalyst. The surface of the catalyst prepared by the invention is loose and porous, the specific surface area is large, the active components are highly dispersed, and the catalytic effect is good.

Description

technical field [0001] The invention belongs to the technical field of chemical catalyst preparation, and in particular relates to a preparation method of a copper-cobalt-based catalyst used for producing low-carbon alcohols from synthesis gas. Background technique [0002] Due to the characteristics of my country's energy structure "rich in coal, poor in oil, and low in gas", the Chinese government has vigorously promoted the strategy of "replacing oil with coal" in recent years, and the synthesis gas (CO+H 2 ) as a raw material, synthesized under the action of a catalyst with C 1 ~C 5 Alcohol-based low-carbon mixed alcohols have broad application prospects. Low-carbon alcohols can not only be used as chemical raw materials and chemicals, but also as alternative fuels and clean gasoline additives. [0003] The currently reported low-carbon alcohol catalysts for syngas synthesis can be generally divided into: ① modified Cu-based methanol catalysts; ② modified Fischer-Trop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10C07C31/08C07C31/04C07C29/156C25D3/56C25D17/10
CPCB01J23/78B01J35/0066B01J35/1019C07C29/156C25D3/56C25D17/10C07C31/04C07C31/08Y02P20/52
Inventor 王亮李亚斐郑长征刘斌丁涛惠盼婷南柯媚黄志刚
Owner XI'AN POLYTECHNIC UNIVERSITY
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