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Double-activity interface supported catalyst as well as preparation method and application thereof

A supported catalyst and dual-activity technology, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds, etc., can solve the problems of complex preparation process, large energy consumption, unsatisfactory space-time yield of methanol, etc., and achieve synthetic The process is simple and easy, the preparation conditions are mild, and the effect of excellent catalytic activity

Active Publication Date: 2022-02-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the above method is adopted, the preparation process is complicated and the required energy consumption is large; the active sites (metal / carrier interface) are not enough; the metal utilization rate is low; the space-time yield of methanol is not ideal

Method used

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  • Double-activity interface supported catalyst as well as preparation method and application thereof
  • Double-activity interface supported catalyst as well as preparation method and application thereof
  • Double-activity interface supported catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of MSS by Stober method:

[0044] Preparation of solution A: Weigh 131mg of CTAB into a 100mL reaction bottle, add 47.75mL of ultrapure water, 22.05mL of absolute ethanol and 0.4mL of ammonia (25%), and ultrasonically form a homogeneous solution A;

[0045] Prepare solution B: Add 100 μL TEOS to 10 mL of absolute ethanol and ultrasonically shake for 10 minutes to obtain solution B;

[0046] Place the reaction bottle containing solution A on a magnetic stirrer and adjust the rotation speed at 450 rpm, and add solution B dropwise to the reaction bottle under continuous stirring, wherein the first 4mL solution B is added dropwise twice with an interval of 30min , and then 6mL of solution B was added dropwise three times at intervals of 1h each time. Stir at room temperature for 24 hours from the beginning of dropwise addition of solution B, collect the sample by centrifugation, wash twice with water and once with ethanol, then dry the resulting white precipita...

Embodiment 2

[0048] Preparation of ZnO-Cu-ZrO 2 Dual active interface supported catalyst (CZZ-MSS):

[0049] Preparation of metal ion loading solution: Weigh 566.31mg of copper nitrate trihydrate and 399.10mg of zinc nitrate hexahydrate, measure 0.96mL of zirconium nitrate solution (1mol / L) in a 15mL centrifuge tube, then add 10mL of a mixed solution of ethanol and water, The volume ratio of ethanol to water is 1:1.

[0050] Preparation of pore-confined dual-active interface-supported catalyst: Weigh 100 mg of the activated MSS prepared in Example 1 into a 30 mL ceramic crucible, take 2 mL of the metal ion loading solution prepared above, and add it dropwise to the crucible in batches. The batch dosage is added dropwise in the following order: 800μL→400μL→400μL→400μL, and after each batch is added, it needs to be shaken in an ultrasonic instrument until there is no obvious moisture, and the next batch of loading should be carried out after drying in an oven at 80°C Dropping of liquid. A...

Embodiment 3

[0052] Preparation of C-MSS supported catalyst:

[0053] Preparation of metal ion loading solution: Weigh 566.31 mg of copper nitrate trihydrate into a 15 mL centrifuge tube, then add 10 mL of a mixed solution of ethanol and water, wherein the volume ratio of ethanol and water is 1:1.

[0054] To prepare a pore-confined highly dispersed active site-supported catalyst, weigh 100 mg of the activated MSS prepared in Example 1 in a 30 mL ceramic crucible, take 2 mL of the metal ion loading solution prepared above, and add it dropwise in batches to the crucible. The amount of each batch is added dropwise in the following order: 800μL → 400μL → 400μL → 400μL, and after each batch is added, it needs to be shaken in an ultrasonic instrument until there is no obvious moisture, and the next batch should be dried in an oven at 80°C Dropwise addition of load solution. After adding all the load liquids, transfer the MSS containing the load liquid to the muffle furnace for two-stage calcin...

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Abstract

The invention relates to a double-activity interface supported catalyst and a preparation method and an application thereof, and the preparation method comprises the following steps: adding CTAB, ultrapure water, ethanol and ammonia water into a reactor to form a uniform solution A; adding TEOS into absolute ethyl alcohol to obtain a solution B; dropwise adding the solution B into the uniform solution A, stirring after dropwise adding, centrifuging to obtain a precipitate, and drying and calcining the precipitate to obtain activated mesoporous silica spheres; mixing a copper nitrate trihydrate solution, a zinc nitrate hexahydrate solution and a zirconium nitrate solution, and then adding a mixed solution of ethanol and water to obtain a metal ion loading solution; and adding the metal ion loading liquid into the activated mesoporous silica spheres in a plurality of batches, and calcining after the metal ion loading liquid is dropwise added to obtain the pore channel confinement double-activity interface supported catalyst. The catalyst is simple in preparation process, mild in preparation condition, high in catalytic activity and high in stability.

Description

technical field [0001] The invention relates to a highly dispersed active interface catalytic material, in particular to a dual-active interface supported catalyst, a preparation method and an application. Background technique [0002] carbon dioxide (CO 2 ) is one of the important members of greenhouse gases, which mainly comes from the burning of fossil fuels. In recent years, the continuous rise of CO 2 Concentrations have caused a series of climate and environmental problems such as: global warming, melting glaciers, rising sea levels, pests and diseases, etc. will CO 2 Conversion to valuable compounds such as alcohols, hydrocarbons, ethers, etc. not only reduces atmospheric CO 2 Concentration can also obtain valuable chemical resources, which has attracted the attention of researchers. CO 2 The process of catalytic hydrogenation to methanol is considered to be the key to the sustainable development of methanol economy. CO 2 The methods of catalytic hydrogenation...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J35/10C07C29/154C07C31/04
CPCB01J23/80C07C29/154B01J35/617B01J35/618B01J35/633B01J35/635C07C31/04Y02P20/52
Inventor 何炽陈长伟姜泽宇田明姣马牧笛徐晗
Owner XI AN JIAOTONG UNIV
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