Preparation method and application of a kind of fibrous catalyst

A catalyst and fibrous technology, which is applied in the field of preparation of fibrous catalysts, can solve the problems such as the inability to continuously carry out the reaction and the complex recovery of supported nano-precious metal catalysts, and achieves the advantages of reducing application costs, easy infiltration and penetration, and conducive to mass transfer. Effect

Inactive Publication Date: 2017-02-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a preparation method of fibrous catalyst, wherein through its reaction raw materials and key process steps (such as loading substrate, precious metal attachment process, reactant concentration and reaction temperature, etc.) can be improved, compared with the prior art, it can effectively solve the difficult problems of complex recovery of supported nano-precious metal catalysts and inability to carry out the reaction continuously; moreover, the preparation method has simple process, convenient operation, cheap and easy-to-obtain reaction materials, and can Effectively reduce the preparation cost of supported catalysts

Method used

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  • Preparation method and application of a kind of fibrous catalyst
  • Preparation method and application of a kind of fibrous catalyst
  • Preparation method and application of a kind of fibrous catalyst

Examples

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Effect test

Embodiment 1

[0026] Synthesis of cellulose@polydopamine / palladium composites:

[0027] 1) Synthesis of cotton fiber@polydopamine (that is, cotton fiber wrapped in polydopamine, cotton fiber wrapped in polydopamine) composite material: dissolve tris in water to prepare 10mM tris aqueous solution 100mL, at 20°C, add 300mg fiber to 10mM tris aqueous solution, then add 300mg dopamine hydrochloride, stir and react for 48 hours, during this process, dopamine hydrochloride polymerizes and wraps on the cotton fiber to obtain cotton fiber Fiber@polydopamine composite material;

[0028] 2) Preparation of cotton fiber@polydopamine / palladium (that is, cotton fiber wrapped by polydopamine / palladium) composite material: Dissolve potassium chloropalladate in water to obtain 100mL of 10mM aqueous solution, pre-cool the solution in an ice bath , add cotton fiber@polydopamine composite material, stir and react at 0°C for 0.5 hours, then remove excess potassium chloropalladate by filtering and rinsing, and ...

Embodiment 2

[0034] Synthesis of glass fiber@polydopamine / palladium complex:

[0035] 1) Synthesis of glass fiber@polydopamine (that is, glass fiber wrapped by polydopamine) composite material: Dissolve tris in water to prepare 10mM tris in water. Add glass fibers to 100mL of 10mM tris aqueous solution, then add 200mg of dopamine hydrochloride, and stir for 36 hours. During this process, dopamine hydrochloride polymerizes and wraps on the fibers to obtain glass fiber@polydopamine composite materials;

[0036] 2) Preparation of glass fiber@polydopamine / palladium (i.e., glass fiber wrapped by polydopamine / palladium) composite material: Dissolve potassium chloropalladate in water to obtain 100mL of 10mM aqueous solution, pre-cool the solution in an ice bath Finally, the glass fiber@polydopamine composite material was added to it, stirred and reacted at 5°C for 0.5 hours, then the excess potassium chloropalladate was removed by filtering and rinsing, and then freeze-dried to obtain glass fiber...

Embodiment 3

[0038] Synthesis of quartz wool fibers@polydopamine / palladium composites:

[0039] 1) Synthesis of quartz wool fiber@polydopamine composite material: Dissolve tris in water to prepare 100 mL of 10 mM tris aqueous solution, add 100 mg of quartz wool fiber to 10 mM tris at 60 °C Add 400mg of dopamine hydrochloride to the aqueous solution of aminomethane, and stir for 3 hours. During this process, dopamine hydrochloride polymerizes and wraps on the quartz wool fibers to obtain quartz wool fibers @ polydopamine composite material;

[0040] 2) Preparation of quartz wool fiber@polydopamine / palladium composite material: Dissolve potassium chloropalladate in water to obtain 100mL of 10mM aqueous solution. After precooling the solution in an ice bath, add quartz wool fiber@polydopamine composite material Among them, the reaction was stirred at 0°C for 2 hours, and then the excess potassium chloropalladate was removed by filtration and rinsing, and then freeze-dried to obtain the quartz...

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Abstract

The invention discloses a preparation method and application of a fibrous catalyst. The preparation method comprises the following steps: (1) synthesizing a fiber @ polydopamine composite material; (2) preparing a fiber@ polydopamine-precious metal composite material; (3) finally obtaining the fibrous catalyst. The fibrous catalyst is applied to fixed beds. By using reaction materials which are low in cost and easy to get, the prepared fibrous catalyst is easy to separate and recover, can be applied to fixed beds, can be used for realizing continuous catalystic reaction, has positive effect for reducing the application cost of the catalyst and has the advantage of improving the production efficiency.

Description

technical field [0001] The invention belongs to the field of catalysts, and more specifically relates to a preparation method and application of a fibrous catalyst. Background technique [0002] Catalysts are reagents often used in chemical reactions, mainly to increase the reaction rate and efficiency. Noble metal is a common type of catalyst, and noble metal nanoparticles have become a research hotspot for researchers because of their large surface area and high catalytic performance. [0003] Noble metal nanoparticles can be directly used as catalysts, but the effective surface area of ​​the catalyst is likely to decrease due to the easy agglomeration of nano-metal particles, resulting in a decrease in catalytic performance. The method used to improve the catalytic efficiency of nano metal particles in the prior art is mainly to load metal nanoparticles on a carrier. [0004] However, further studies have shown that although the existing partially supported nano-noble m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J35/06
Inventor 王帅奚江波
Owner HUAZHONG UNIV OF SCI & TECH
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