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Preparation method of Rh@CuSiO3 core-sheath structured catalyst

A technology of catalysts and hydrogenation catalysts, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor thermal stability and crystal grain migration of active components Rh, and achieve large gas flow Quantity, solve the effect of grain migration

Inactive Publication Date: 2018-04-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For Rh-based catalysts in CO 2 Problems such as grain migration, sintering, and poor thermal stability of the active component Rh are prone to occur during the reaction process of hydrogenation to low-carbon alcohols. The present invention designs and uses conventional materials such as oxides and silicates to develop low-cost, simple-to-operate The core-sheath structure Rh-based nanoreactor catalyst, coupled with the confinement effect of the core-sheath structure material and the synergistic effect between components, improves the dispersion of the active component and its interaction with the carrier, thereby improving the reactivity and stability. sexual purpose

Method used

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  • Preparation method of Rh@CuSiO3 core-sheath structured catalyst
  • Preparation method of Rh@CuSiO3 core-sheath structured catalyst
  • Preparation method of Rh@CuSiO3 core-sheath structured catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1.5 g of Cu(NO 3 ) 2 •6H 2 O was dissolved in water, then 25% ammonia water was added to make the solution precipitate and then dissolved again, and then ethanol was added to stir. After 10 minutes, the previously prepared 0.5mol / L NaSiO 3 •9H 2 Add 10mL of O solution into the solution to form a blue precipitate, stir for 180min, then transfer to a 150mL hydrothermal kettle, move to an oven for 12-36 hours under 473K hydrothermal treatment, then take it out for cooling, filter, wash, dry, and roast. Vested CuPNTs. Then 0.032g solid RhCl 3 Add to 25ml absolute ethanol and sonicate to aid in dissolution. RhCl 3 After all the solids are dissolved, pour 0.5 g of CuPNTs weighed in advance, and continue to sonicate. After all the CuPNTs are dissolved, sonicate for another 20 min and take it out of the ultrasonic cleaner. Add 25ml of deionized water, stir and let it stand. After layering, divide the lower layer solution into several watch glasses, dry at 80°C, and bake ...

Embodiment 2

[0027] In this example, on the basis of Example 1, the loading amount of the loaded active component is changed.

[0028] 1.5 g of Cu(NO 3 ) 2 •6H 2 O was dissolved in water, then 25% ammonia water was added to make the solution precipitate and then dissolved again, and then ethanol was added to stir. After 10 minutes, the previously prepared 0.5mol / L NaSiO 3 •9H 2 Add 10mL of O solution into the solution to form a blue precipitate, stir for 180min, then transfer to a 150mL hydrothermal kettle, move to an oven for 12-36 hours under 473K hydrothermal treatment, then take it out for cooling, filter, wash, dry, and roast. Vested CuPNTs. Then 0.077g solid RhCl 3 Add to 25ml absolute ethanol and sonicate to aid in dissolution. RhCl 3 After the solids are completely dissolved, pour 0.5g of CuPNTs weighed in advance, and continue to sonicate. After the CuPNTs are completely dissolved, sonicate for another 20 minutes and take it out of the ultrasonic cleaner. Add 25ml of deion...

Embodiment 3

[0030] In this example, on the basis of Example 1, the loading amount of the loaded active component is changed.

[0031] 1.5 g of Cu(NO 3 ) 2 •6H 2 O was dissolved in water, then 25% ammonia water was added to make the solution precipitate and then dissolved again, and then ethanol was added to stir. After 10 minutes, the previously prepared 0.5mol / L NaSiO 3 •9H 2 Add 10mL of O solution into the solution to form a blue precipitate, stir for 180min, then transfer to a 150mL hydrothermal kettle, move to an oven for 12-36 hours under 473K hydrothermal treatment, then take it out for cooling, filter, wash, dry, and roast. Vested CuPNTs. Then 0.113g solid RhCl 3 Add to 25ml absolute ethanol, sonicate to help dissolve. RhCl 3After the solids are completely dissolved, pour 0.5g of CuPNTs weighed in advance, and continue to sonicate. After the CuPNTs are completely dissolved, sonicate for another 20 minutes and take them out of the ultrasonic cleaner. Add 25ml of deionized wa...

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Abstract

The invention discloses an Rh@CuSiO3 nano-structure hydrogenation catalyst and a preparation method of same. The preparation method includes the steps of: 1) synthesizing silicate nanotubes in an ethanol-water system through a hydrothermal method, and controllably synthesizing cupric silicate nanotubes by adjusting experimental conditions; 2) supporting metal rhodium in the cupric silicate nanotubes through an impregnation method. In the Rh@CuSiO3 hydrogenation catalyst, the structural confinement effect of the core-sheath material and synergistic effect among the components are coupled, so that dispersity of active components is increased and interaction between the active components and the supporter is improved, thereby improving the catalytic performance in the hydrogenation. The catalyst has extensive application prospect.

Description

technical field [0001] The present invention relates to a kind of Rh@CuSiO 3 Nanostructured noble metal catalyst and preparation method thereof, the catalyst uses confinement to make Rh species exist in the form of nanoparticles, has a high amount of Rh active components and thermal stability, and can be used for CO 2 Catalytic hydrogenation reaction. Background technique [0002] CO 2 Catalytic hydrogenation reaction can convert and produce a variety of low-carbon compounds, which is of great significance to environmental protection and industrial production. So far, CO 2 Catalysts for catalytic hydrogenation are usually heterogeneous systems, which can be mainly classified into supported catalysts with copper, noble metals and bimetallic active components. Among them, typical noble metals such as Rh have strong H 2 Dissociation and hydrogenation reaction ability, and the metal Rh is in the periodic table of elements between the elements (Fe, Co) that easily decompose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/03B01J37/08B01J37/10
CPCB01J23/8926B01J37/031B01J37/08B01J37/10B01J35/396
Inventor 岳海荣廖瑞唐思扬刘长军梁斌
Owner SICHUAN UNIV
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