Carbon nano tube composite nanometer cobalt-copper alloy catalyst for low-carbon alcohol synthesis and preparation method of carbon nano tube composite nanometer cobalt-copper alloy catalyst

A carbon nanotube composite and carbon nanotube technology, which is applied in the preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of inability to achieve nano-cobalt-copper alloy catalyst breakthroughs, etc. problems, to achieve the effects of not easy sintering growth, high selectivity of low-carbon alcohols, and stable catalytic performance

Inactive Publication Date: 2015-04-01
TIANJIN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] There are also many documents that have been studied and reported on nano-cobalt-copper alloy catalysts for the synthesis of low-carbon alcohols, but there are diffe

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  • Carbon nano tube composite nanometer cobalt-copper alloy catalyst for low-carbon alcohol synthesis and preparation method of carbon nano tube composite nanometer cobalt-copper alloy catalyst
  • Carbon nano tube composite nanometer cobalt-copper alloy catalyst for low-carbon alcohol synthesis and preparation method of carbon nano tube composite nanometer cobalt-copper alloy catalyst
  • Carbon nano tube composite nanometer cobalt-copper alloy catalyst for low-carbon alcohol synthesis and preparation method of carbon nano tube composite nanometer cobalt-copper alloy catalyst

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Embodiment 1

[0035] Add carbon nanotubes, 98% (w / w) sulfuric acid, and 65% (w / w) nitric acid to a dry container, after ultrasonication for 2 hours, reflux at 100°C for 2h, filter and wash, and dry at 60°C for 12h to obtain For the acidified carbon nanotubes, the carbon nanotubes, 98% (w / w) sulfuric acid, and 65% (w / w) nitric acid have a mass ratio of 1:30:10. Weigh 25g of carbon nanotubes and disperse them in 15L of deionized water to obtain a carbon nanotube dispersion;

[0036] The molar ratio of copper nitrate, cobalt nitrate and aluminum nitrate is 1:2:1.5 to prepare a mixed salt solution with a total metal concentration of 1mol / L, which is recorded as solution A; 2 CO 3 )=0.66mol / L and c(NaOH)=4.1mol / L are made into mixed alkaline solution and denoted as B. Add solution A and solution B into the reactor containing the above-mentioned carbon nanotube dispersion in parallel, and control the pH value to 9.5. After the solution A is added dropwise, age for 12 hours at a temperature of 8...

Embodiment 2

[0042] Add carbon nanotubes, 98% (w / w) sulfuric acid, and 65% (w / w) nitric acid into a dry container, ultrasonicate for 3 hours, reflux at 100°C for 3h, wash with suction, and dry at 70°C for 20h to obtain For the acidified carbon nanotubes, the carbon nanotubes, 98% (w / w) sulfuric acid, and 65% (w / w) nitric acid have a mass ratio of 1:35:10. Weigh 2g of carbon nanotubes and disperse them in 15L of deionized water to obtain a carbon nanotube dispersion;

[0043] The molar ratio of copper nitrate, cobalt nitrate, aluminum nitrate and zinc nitrate is 1:2:1.5:2 to make a mixed salt solution with a total metal concentration of 1mol / L, which is recorded as solution A; 2 CO 3 )=0.58mol / L and c(NaOH)=1.0mol / L are made into mixed alkaline solution and denoted as B. Add solution A and solution B into a 1.5L reactor with a concentration of 2.7g / L carbon nanotube dispersion in parallel, and control the pH value to 9.7. After the solution A is added dropwise, age at a temperature of 70°...

Embodiment 3

[0046] Add carbon nanotubes, 98% (w / w) sulfuric acid, and 65% (w / w) nitric acid to a dry container, and after ultrasonication for 4 hours, reflux at 100°C for 4h, filter and wash, and dry at 80°C for 24h to obtain For the acidified carbon nanotubes, the carbon nanotubes, 98% (w / w) sulfuric acid, and 65% (w / w) nitric acid have a mass ratio of 1:40:10. Weigh 15g of carbon nanotubes and disperse them in 15L of deionized water to obtain a carbon nanotube dispersion;

[0047]The molar ratio of copper nitrate, cobalt nitrate, aluminum nitrate and magnesium nitrate is 1:2:6:2 to make a mixed salt solution with a total metal concentration of 0.5mol / L, which is recorded as solution A; according to c(Na2CO3)=1.35 mol / L and c(NaOH)=2.5mol / L to form a mixed alkali solution. Add solution A and solution B concurrently into a 1.0L reactor with a concentration of 3.0g / L carbon nanotube dispersion, and control the pH value to 10.5. After the solution A is added dropwise, age for 24 hours at a...

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Abstract

The invention relates to a carbon nano tube composite nanometer cobalt-copper alloy catalyst for low-carbon alcohol synthesis and a preparation method of the carbon nano tube composite nanometer cobalt-copper alloy catalyst. According to the preparation method, firstly Co, Cu, Al and other additives are prepared into hydrotalcite-like structural substances to realize the uniform mixing of Co and Cu; CNTs and a hydrotalcite-like compound are compounded as a precursor of the catalyst, wherein a carbon nano tube is used as a diluent and the CNTs is used as a dispersing agent to prepare the nanometer cobalt-copper alloy catalyst used for preparing low-carbon alcohol from a synthetic gas; the uniform mixing of various metal ions contained in the precursor of the catalyst and copper ions and cobalt ions especially can be realized by controlling a deposition condition; because strong interaction exists between metal and the carbon nano tube, a Cu-Co nanometer alloy can be highly dispersed on the carbon nano tube after reduction, so that the granule sintering, which is caused by migration, of the Cu-Co nanometer alloy is effectively prevented. The prepared Cu-Co active component has the large active specific surface area, and the sintering of the Cu-Co active component can be inhibited by a carrier and the additives.

Description

technical field [0001] The invention relates to the technical field of chemical catalysts, in particular to a catalyst for producing low-carbon alcohols from synthesis gas, its preparation method and application. Background technique [0002] Syngas (CO and H 2 Mixed gas), it is possible to produce low-carbon alcohols (referring to alcohols containing two or more carbon atoms) from syngas, and low-carbon alcohols have important application value in the fields of fuel and chemical industry. Low-carbon alcohols can be used as high-quality power fuels. As petroleum additives, they can replace the controversial MTBE and the more toxic tetraethyl lead. high in alcohols. In addition, low-carbon alcohol can also be used as one of the means of coal liquefaction to achieve the alkylation and solubilization of coal and as a substitute for liquefied petroleum gas. [0003] Syngas to low-carbon alcohols is often accompanied by methanol, hydrocarbons and CO 2 Therefore, the key to th...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/80B01J23/889B01J23/755B01J23/86C07C29/156C07C31/02
Inventor 刘源曹昂刘贵龙王联防韩通
Owner TIANJIN UNIV
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