Anti-protein structure catalyst particle for catalytic oxidation of methane and preparation method of anti-protein structure catalyst particle

A technology of anti-protein structure and catalyst particles, which is applied in the field of anti-protein structure catalyst particles and its preparation, can solve the problems of high economic cost and danger, achieve high flow rate, easy recovery, and reduce the effect of material diffusion resistance

Pending Publication Date: 2022-06-28
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most natural gas resources are distributed in sparsely populated remote areas. As a flammable and explosive gas, long-distance transportation of methane is very dangerous and has high economic costs.

Method used

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  • Anti-protein structure catalyst particle for catalytic oxidation of methane and preparation method of anti-protein structure catalyst particle
  • Anti-protein structure catalyst particle for catalytic oxidation of methane and preparation method of anti-protein structure catalyst particle
  • Anti-protein structure catalyst particle for catalytic oxidation of methane and preparation method of anti-protein structure catalyst particle

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Experimental program
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Effect test

Embodiment 1

[0024] The inverse protein structure catalyst particles for catalytic oxidation of methane of the present invention, the preparation method comprises:

[0025] (1) adopting emulsion polymerization to prepare PS (polystyrene) microspheres with a particle size of 200 nm (the coefficient of variation in particle size is less than 5%), and the obtained PS microspheres are lyophilized and stored;

[0026] (2) Weigh 0.3g PS microspheres, 0.1g SiO 2 Nanoparticles (particle size 5nm), 0.31g lanthanum nitrate (0.95mmol), 0.34g manganese nitrate (1.90mmol), 0.21g strontium nitrate (0.99mmol) were dispersed and dissolved in 2mL ethylene glycol, 2mL methanol and 6mL deionized water. In the mixed solvent, mixed solution A was obtained; mixed solution A was used as the dispersed phase, and the fluorine oil reagent was used as the continuous phase, and the microfluidic emulsification method was used to prepare monodisperse microdroplets. The size of the microdroplets can be adjusted by adjus...

Embodiment 2

[0030] On the basis of Example 1, Pd nanoparticles were also introduced on the surface of the prepared inverse opal catalyst particles A; the specific steps were as follows:

[0031] (1) and (2) are the same as in Example 1;

[0032] (3) Take 0.45g PdCl 2 , 0.30g polyvinyl alcohol (molecular weight is 10 4 g / mol) was dispersed and dissolved in 10 mL of deionized water to obtain mixed solution B; 1 g of catalyst particles A and 3 g of NaBH were sequentially added to mixed solution B under the conditions of an ice bath and nitrogen injection. 4 , the reaction is 30min;

[0033] (4) Suction filtration of the product obtained in step (3) with a Buchner funnel, and washing with a large amount of deionized water; drying in an oven at 80 ° C after washing;

[0034] (5) calcining the dried product obtained in step (4) in an air atmosphere (calcination conditions are: 500° C., 3 h) to obtain hierarchically porous Pd / SiO 2 -La 0.5 Sr 0.5 MnO 3 Inverse Opal Catalyst Particles B. ...

Embodiment 3

[0037] On the basis of Example 1, Au nanoparticles were also introduced on the surface of the prepared inverse opal catalyst particles A to further improve the catalytic performance, and the specific steps were as follows:

[0038] (1) and (2) are the same as in Example 1.

[0039] (3) Take A1 g of inverse opal catalyst particles, drop 0.3 mL of 1 mol / L gold acetate solution on the surface, and store in the dark for 30 minutes, the gold acetate will penetrate into the voids of the inverse opal; UV light for 30min to make Au + Reduction to elemental Au to obtain Au / TiO 2 -La 0.5 Sr 0.5 MnO 3 Anti-Protein Catalyst Particles C.

[0040] The experimental procedure of catalyst activity is the same as that in Example 1.

[0041] The catalytic activity data of the inverse protein structure catalyst particles of Examples 1-3 are as follows: image 3 As can be seen from the figure, the catalysts loaded with Pd and Au precious metals have almost the same catalytic oxidation perfo...

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Abstract

The invention discloses an anti-protein structure catalyst particle for catalytic oxidation of methane, which takes inorganic nanoparticles as a carrier, is loaded with a catalyst for catalytic oxidation of methane on the surface, has a macroporous-mesoporous-microporous hierarchical pore structure, and has a particle size range of 50-1000 microns; the preparation method comprises the following steps: (1) preparing polymeric microspheres by using an emulsion polymerization method; (2) dissolving the microspheres, inorganic nanoparticles and a catalyst precursor in a solution to form a continuous phase, taking an oil phase as a dispersed phase, preparing micro-droplets through a microfluidic technology, and drying the obtained micro-droplets to remove a solvent, so as to obtain organic-inorganic hybrid microsphere particles; (3) calcining the organic-inorganic hybrid microsphere particles obtained in the step (2) to obtain anti-protein structure catalyst particles; the catalyst particle has an anti-protein structure and a large aperture, the surface of the catalyst is loaded with the catalyst, catalytic conversion of methane is facilitated, the pore channel arrangement is neat and ordered, the substance diffusion resistance can be reduced, and the optimal flow velocity and higher efficiency are provided for substance diffusion.

Description

technical field [0001] The invention relates to a catalyst, in particular to an inverse protein structure catalyst particle for catalytic oxidation of methane and a preparation method thereof. Background technique [0002] Methane, as the main component of natural gas, is not only one of the cleanest fossil fuels, but also an important C1 raw material for the production of bulk chemicals due to its large reserves and relatively low price. In recent years, the proportion of natural gas production in fossil energy has generally shown an increasing trend, with an overall increase of 3.7%. Natural gas has gradually become one of the main energy sources of China's clean energy system. Therefore, the rational application of natural gas resources plays a vital role in both the economy and the environment. However, most natural gas resources are distributed in sparsely populated remote areas. Methane, as a flammable and explosive gas, has great dangers in long-distance transportat...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/656B01J23/68B01D53/86B01D53/72C07C29/50C07C31/04
CPCB01J23/34B01J23/6562B01J23/688B01J23/002B01D53/8668C07C29/50B01J2523/00B01D2257/7025B01J35/23B01J2523/24B01J2523/3706B01J2523/41B01J2523/72B01J2523/47C07C31/04Y02P20/52
Inventor 余子夷衡永远张静吴官府沈宇
Owner NANJING UNIV OF TECH
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