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Micro-nano structure copper-based catalyst and preparation method and application thereof

A copper-based catalyst, a technology of micro-nano structure, applied in the preparation of hydroxyl compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of high dispersion of active copper particles, affecting catalytic reaction activity, and sintering of copper nanoparticles. , to achieve the effect of improving the load and dispersibility, large interaction, and high dispersity of metal elements

Inactive Publication Date: 2016-05-04
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects in the prior art, to provide a micro-nano structure copper-based catalyst and its preparation method and application, which is used to solve the problem that the active component precursors in the prior art are easily enriched on the surface of the carrier , especially when the load is high, the surface agglomeration phenomenon is more serious, making it difficult for the active copper particles to be highly dispersed, and it is easy to cause the sintering and growth of copper nanoparticles in the subsequent reduction and reaction process, thus affecting the catalytic activity. question

Method used

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  • Micro-nano structure copper-based catalyst and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of catalyst: 9.112gCu(NO 3 ) 2 .3H 2 O, 5.483gZn(NO 3 ) 2 .6H 2 O, 53.946g (NH 4 ) 2 CO 3 Dissolve in 175mL of ammonia solution (25wt%), add deionized water to the total volume of the solution to 500mL, stir to make it completely dissolved, to obtain the precursor salt solution, the precursor salt solution is transferred to a four-necked flask, and placed In an oil bath, add 10g of Al to it while stirring 2 o 3 Carrier, continue to react for 1h. Heat the oil bath to 120°C and continue stirring for a certain period of time. After the stirring is stopped, the supernatant of the solution becomes colorless, which is the end point of the reaction. After the reaction, wash with deionized water for 3 times, and dry the obtained precipitate at 100°C overnight, and bake the dried sample at 400°C for 4 hours to prepare the copper-based micro-nano structure material CuO / ZnO / Al 2 o 3 .

[0029] Take 1.00 g of the above sample and put it in a fixed-bed r...

Embodiment 2

[0031] Preparation of catalyst: 1.519gCu(NO 3 ) 2 .3H 2 O, 0.914gZn(NO 3 ) 2 .6H 2 O, 4..496g (NH 4 ) 2 CO 3Dissolve in 29mL of ammonia solution (25wt%), add deionized water to it until the total volume of the solution is 500mL, stir to make it completely dissolved to obtain a precursor salt solution, transfer the precursor salt solution to a four-necked flask, and place In an oil bath, add 10g of Al to it while stirring 2 o 3 Carrier, continue to react for 1h. Heat the oil bath to 50°C and continue to stir for a certain period of time. After the stirring is stopped, the supernatant of the solution becomes colorless, which is the end of the reaction. After the reaction, wash with deionized water for 3 times, and dry the obtained precipitate at 60°C overnight, and bake the dried sample at 200°C for 8 hours to prepare copper-based micro-nano structure material CuO / ZnO / Al 2 o 3 .

[0032] Take 1.00 g of the above sample and put it in a fixed-bed reactor, and first re...

Embodiment 3

[0034] Preparation of catalyst: 2.283gCu(Ac) 2 , 1.127gZn(Ac) 2 , 8.991g (NH 4 ) 2 CO 3 Dissolve in 58mL of ammonia solution (25wt%), add deionized water to it until the total volume of the solution is 500mL, stir to make it dissolve completely, obtain the precursor salt solution, transfer the precursor salt solution into a four-necked flask, and place In an oil bath, add 10g of Al to it while stirring 2 o 3 Carrier, continue to react for 1h. Heat the oil bath to 90°C and continue to stir for a certain period of time. After the stirring is stopped, the supernatant of the solution becomes colorless, which is the end of the reaction. After the reaction, wash with deionized water for 3 times, and dry the obtained precipitate at 70°C overnight, and bake the dried sample at 350°C for 6 hours to prepare the copper-based micro-nano structure material CuO / ZnO / Al 2 o 3 .

[0035] Take 1.00g of the above sample and put it in a fixed-bed reactor, and first reduce it at 230°C for...

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Abstract

The present invention provides a micro-nano structure copper-based catalyst and a preparation method and application thereof, and the micro-nano structure copper-based catalyst comprises the following components by weight: 5%-40% of CuO, 2.5%-20 % of ZnO and 40%-92.5% of Al2O3. The micro-nano structure copper-based catalyst has the advantages of uniform particle size distribution, large specific surface area, strong mechanical properties, smaller copper particle size, high active ingredient copper content and high dispersion, high activity in CO2 hydrogenation operation, good stability, low cost, simple preparation, easy industrial expanding, and the like.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a copper-based catalyst with a micro-nano structure and a preparation method and application thereof. Background technique [0002] CO 2 As carbon source compounds that exist in abundance in nature, how to convert them into fuels or high value-added chemicals has become the focus of many researchers. Among them, the CO 2 Converting to methanol will be an effective way to solve the two major problems of greenhouse gas emissions and fossil fuel substitution, because methanol is not only an important organic chemical raw material, but also a non-petroleum-based clean synthetic fuel. Due to the advantages of high activity at low pressure, low cost, and good comprehensive performance, copper-based catalysts are widely used in CO 2 Hydrogenation field. As the copper particle size decreases, its catalytic activity increases significantly. However, the chemical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C07C29/154C07C31/04
CPCC07C29/154B01J23/002B01J23/007B01J23/80B01J2523/00B01J35/40B01J35/613B01J35/615B01J2523/17B01J2523/27B01J2523/31C07C31/04Y02P20/52
Inventor 王慧杨海艳孙予罕魏伟高鹏夏林肖硕张艳飞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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