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A kind of preparation method and application of cu-zno-zro2-nh2/sba-15 composite catalyst

A composite catalyst and mixed solution technology, which is applied in the preparation of organic compounds, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of reducing catalytic effect, copper sintering of active components, and large difference between theoretical loading and actual content, etc. problem, to achieve the effect of improved catalytic effect and good dispersion

Active Publication Date: 2019-02-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the binding force between the SBA-15 carrier and copper nitrate is relatively weak, and most of the active components may be lost during the preparation process, resulting in a large difference between the theoretical load and the actual content, and direct roasting is likely to cause sintering and particle formation of the active component copper. becomes larger, thereby reducing the catalytic effect

Method used

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  • A kind of preparation method and application of cu-zno-zro2-nh2/sba-15 composite catalyst
  • A kind of preparation method and application of cu-zno-zro2-nh2/sba-15 composite catalyst
  • A kind of preparation method and application of cu-zno-zro2-nh2/sba-15 composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The R-Cu-ZnO-ZrO 2 -NH 2 The preparation method of / SBA-15 composite catalyst, its concrete steps are as follows:

[0025] (1) 2.0 g of modified mesoporous molecular sieve NH 2 / SBA-15 white powder is added to the concentration of 0.05mol / L Cu(NO 3 ) 2 In absolute ethanol solution, stir magnetically at 40°C for 4 hours; then add 50ml of reducing agent NaBH with a concentration of 0.5mol / L under ultrasonic stirring 4 solution (NaBH 4 placed in ice water solvent) for reduction for 40 minutes, then filtered and washed (filtered 5 times with absolute ethanol and washed 3 times) to obtain a solid product;

[0026] (2) Combine zinc nitrate and zirconium nitrate with Cu(NO 3 ) 2 Medium Cu 2+ : Zn 2+ : Zr 2+ The molar ratio is 5:4:1 and is added in the ethanol solution to obtain a mixed solution, and the Zn in the mixed solution 2+ The concentration of 0.04mol / L, Zr 2+ The concentration is 0.01mol / L;

[0027] (3) Add the solid product obtained in step (1) to the mix...

Embodiment 2

[0061] The Cu-ZnO-ZrO 2 -NH 2 The preparation method of / SBA-15 composite catalyst, its concrete steps are as follows:

[0062] (1) 2.0 g of modified mesoporous molecular sieve NH 2 / SBA-15 white powder is added to the concentration of 0.04mol / L Cu(NO 3 ) 2 In absolute ethanol solution, stir magnetically for 3 hours at 40°C; then add 50ml of reducing agent NaBH with a concentration of 0.3mol / L under ultrasonic stirring 4 solution (NaBH 4 placed in ice water solvent) for 30 minutes, then filtered and washed (filtered 5 times with absolute ethanol and washed 3 times) to obtain a solid product;

[0063] (2) Combine zinc nitrate and zirconium nitrate with Cu(NO 3 ) 2 Medium Cu 2+ : Zn 2+ : Zr 2+ The molar ratio is 5:4:1 and is added in the ethanol solution to obtain a mixed solution, and the Zn in the mixed solution 2+ The concentration is 0.04mol / L, Zr 2+ The concentration is 0.01mol / L;

[0064] (3) Add the solid product obtained in step (1) to the mixed solution in s...

Embodiment 3

[0070] The Cu-ZnO-ZrO 2 -NH 2 The preparation method of / SBA-15 composite catalyst, its concrete steps are as follows:

[0071] (1) 2.0 g of modified mesoporous molecular sieve NH 2 / SBA-15 white powder is added to the concentration of 0.1mol / L Cu(NO 3 ) 2 In absolute ethanol solution, stir magnetically at 40°C for 4 hours; then add 50ml of reducing agent NaBH with a concentration of 0.6mol / L under ultrasonic stirring 4 solution (NaBH 4 placed in ice water solvent) to reduce for 60 minutes, then filtered and washed (filtered 5 times with absolute ethanol and washed 3 times) to obtain a solid product;

[0072] (2) Combine zinc nitrate and zirconium nitrate with Cu(NO 3 ) 2 Medium Cu 2+ : Zn 2+ : Zr 2+ The molar ratio is 5:4:1 and is added in the ethanol solution to obtain a mixed solution, and the Zn in the mixed solution 2+ The concentration is 0.04mol / L, Zr 2+ The concentration is 0.01mol / L;

[0073] (3) Add the solid product obtained in step (1) to the mixed solu...

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Abstract

The invention relates to a preparation method of a Cu-ZnO-ZrO2-NH2 / SBA-15 composite catalyst and an application thereof, and belongs to the technical fields of nanometer catalyst preparation and catalysis researches. Modified mesoporous molecular sieve NH2 / SBA-15 white powder is added into an ethanol solution of Cu(NO3)2 with magnetic stirring, a reducing agent NaBH4 is added with an ultrasonic mixing condition, filtering and washing are carried out, in order to obtain a solid product; the solid product is added into a mixed solution of zinc nitrate and zirconium nitrate with stirring and dipping, finally filtering, washing, drying and calcination are carried out, in order to obtain the Cu-ZnO-ZrO2-NH2 / SBA-15 composite catalyst. Cupric nitrate and a modified carrier form a complex, in order to reserve more active components.

Description

technical field [0001] The present invention relates to a kind of Cu-ZnO-ZrO 2 -NH 2 The preparation method and application of the / SBA-15 composite catalyst belong to the technical field of nano catalyst preparation and catalysis research. Background technique [0002] As we all know, CO 2 is the main greenhouse gas, CO 2 Excessive emissions will bring a series of environmental problems and affect human life. CO now 2 The rational use of CO is particularly important, and how to use CO 2 Hydrogenation to low-carbon alcohols has become one of the research hotspots. As a basic organic chemical product and environmentally friendly power fuel, methanol has broad application prospects. Methanol chemical industry has become an important field of chemical industry. with CO 2 The process of catalytic hydrogenation of raw materials to methanol can alleviate the greenhouse effect and also realize CO 2 recycling, turning waste into treasure. Therefore, from the perspective of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03C07C29/154C07C31/04
CPCY02P20/52
Inventor 王华李艳艳纳薇高文桂
Owner KUNMING UNIV OF SCI & TECH