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Preparation method of copper-cobalt-based catalyst for preparing low-carbon alcohols from synthesis gas

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

Active Publication Date: 2020-01-10
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • 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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  • Preparation method of copper-cobalt-based catalyst for preparing low-carbon alcohols from synthesis gas
  • Preparation method of copper-cobalt-based catalyst for preparing low-carbon alcohols from synthesis gas
  • Preparation method of copper-cobalt-based catalyst for preparing low-carbon alcohols from synthesis gas

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Embodiment 1

[0035] 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:

[0036] 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;

[0037] 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

[0048] 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:

[0049] Step 1 is identical with embodiment 1;

[0050] 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;

[0051] 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;

[0052] Step 3, place the cathode electrode material and anode electrode ma...

Embodiment 3

[0058] 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:

[0059] Step 1 is identical with embodiment 1;

[0060] 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;

[0061] 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;

[0062] 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 preparing low-carbon alcohols from synthesis gas. The preparation method comprises the following specific steps: step1, treating carbon nanotubes in concentrated nitric acid, coating carbon paper with the treated carbon nanotubes by evaporation, and naturally airing to obtain a cathode electrode material; 2, addinganhydrous cupric sulfate, cobalt sulfate heptahydrate, sodium citrate and sodium sulfate into ionized water, uniformly stirring to obtain a solution a, adjusting the pH value, and putting the solution into a constant-temperature water bath kettle to obtain an electrolyte; 3, putting the cathode electrode material and an anode electrode material into an electrolyte, connecting the cathode electrode material and the anode electrode material by adopting a numerical control constant-current electroplating power supply, and carrying out electrolysis to obtain a copper-cobalt-based catalyst sample;and 4, washing the copper-cobalt-based catalyst sample into a container, drying, roasting, tabletting, grinding and screening to obtain the copper-cobalt-based catalyst. The prepared catalyst is loose and porous in surface, large in specific surface area, highly dispersed in active components and good in catalytic effect.

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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IPC IPC(8): B01J23/78B01J35/10C07C31/08C07C31/04C07C29/156C25D3/56C25D17/10
CPCB01J23/78C07C29/156C25D3/56C25D17/10B01J35/394B01J35/615C07C31/04C07C31/08Y02P20/52
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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