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A kind of preparation method and application of nb-mo eutectic mesoporous metal oxide catalyst

A technology of oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problems of large catalyst differences and low catalyst repeatability, Achieve the effects of simple preparation method, short preparation cycle and high catalytic activity

Active Publication Date: 2020-08-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more classic preparation of eutectic mesoporous metal oxides such as Nb-M (M=Mo, W, Sb, Sn) mostly uses P123 or F127 as a template agent, and is prepared by rotary evaporation self-assembly method, and the preparation cycle is as long as 11d- 15d, and due to the influence of ambient temperature and humidity, the reproducibility of the prepared catalyst is not high, that is, the difference between different batches of catalysts caused by the preparation method is relatively large

Method used

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  • A kind of preparation method and application of nb-mo eutectic mesoporous metal oxide catalyst
  • A kind of preparation method and application of nb-mo eutectic mesoporous metal oxide catalyst
  • A kind of preparation method and application of nb-mo eutectic mesoporous metal oxide catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Provide a kind of Nb 0.8 Mo 0.2 O x Catalyst preparation method

[0037] a) 7.5g cetyltrimethylammonium bromide is dissolved in 7.5mL H 2 In O, stir at 40°C until completely dissolved. Recorded as A solution.

[0038] b) Weigh 8mmol NbCl 5 (2.161g) and 2mmol MoCl 5 (0.546g), gradually added to 10mL ethanol solution, stirring vigorously for about 10min. Recorded as B solution.

[0039] c) Add B solution to A solution dropwise, and further fully stir for about 30 minutes. This solution is referred to as C solution.

[0040] d) Prepare 10 mL of HCl aqueous solution with pH ≈ 1, and add it to C solution. This solution is referred to as D solution.

[0041] e) Transfer D solution to a hydrothermal kettle and hydrothermally heat it at 160°C for 24 hours.

[0042] f) After the hydrothermal kettle is lowered to room temperature, the product in the kettle is washed to neutrality, and the solid product is separated by suction filtration.

[0043] g) Place the solid product ...

Embodiment 2

[0045] Embodiment 2: Provide a kind of Nb 0.5 Mo 0.5 O x Catalyst preparation method

[0046] Take 5mmol NbCl in step (b) 5 (1.351g) and 5mmol MoCl 5 (1.366g) was dissolved in ethanol and stirred well to prepare B solution. The remaining steps are the same as in Example 1.

Embodiment 3

[0047] Embodiment 3: Provide a kind of Nb 0.2 Mo 0.8 O x Catalyst preparation method

[0048] Take 2mmol NbCl in step (b) 5 (0.540g) and 8mmol MoCl 5 (2.186g) was dissolved in ethanol and stirred well to prepare B solution. The remaining steps are the same as in Example 1.

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Abstract

The invention provides an Nb-Mo eutectic mesoporous metal oxide catalyst, which is characterized in that the catalyst has the following chemical general formula: NbaMo1-aOx, wherein 0 <a <1, x dependson the valence state of the prepared element to meet the chemical formula valence sum of 0. The method for preparing the Nb-Mo eutectic mesoporous metal oxide catalyst has the advantages of simple preparation method, short preparation period and uniform mesoporous distribution, and the eutectic mesoporous oxide still maintains the excellent characteristics of a single metal oxide.

Description

Technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a preparation method and application of a Nb-Mo eutectic mesoporous metal oxide catalyst. Background technique [0002] my country is rich in biomass energy resources. The total amount of biomass resources that can be used as energy in the country is about 460 million tons of standard coal per year. The potential for energy utilization is huge. Therefore, my country attaches great importance to the development of biomass energy. [0003] Lignin accounts for about 15%-40% of the dry basis weight of lignocellulosic biomass raw materials. Approximately 150-180 million tons of lignin are produced worldwide each year, of which less than 2% is used, mainly as lignosulfonates It is used as building material additives, and most of them are burned as cheap fuels, causing huge waste of resources and serious environmental pollution. [0004] Lignin raw materials mainly include alkali l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28B01J35/10C07G1/00C07C37/00C07C39/00C07C1/20C07C15/00
CPCB01J23/002B01J23/28B01J35/1014B01J35/1038B01J35/1061C07C1/20C07C37/004C07G1/00C07C39/00C07C15/00
Inventor 骆仲泱李思敏周劲松王树荣余春江
Owner ZHEJIANG UNIV
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