Catalytic phase-change medium ball for methanol combustion and preparation method thereof

A phase change medium, methanol technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as no open flame, improve catalytic activity, increase transmission rate, and solve sintering and agglomeration Effect

CN109908932BActive Publication Date: 2020-05-05苏斌
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-05-05

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Abstract

The invention discloses a catalytic phase-change medium ball for methanol combustion and a preparation method thereof, mainly comprising high-temperature phase-change material components, active material components, carrier material components, catalyst components, nano-semiconductor material components, and nano-transition material components. Composed of metal components and adhesive components. The catalytic phase-change medium sphere of the present invention can be prepared by a mixed pressing and sintering process to prepare a solid sphere of catalytic phase-change medium. During the methanol combustion process, the energy conversion rate of methanol can reach 87.5%, and the combustion furnace temperature of methanol can reach above 900°C, and realize Waste heat recovery; or use electrostatic adsorption and in-situ redox reaction to prepare microporous hollow spheres as catalytic phase change media. The methanol combustion process can convert methanol energy to more than 99%, and the combustion furnace temperature of methanol can reach 1000°C above, and realize waste heat recovery.
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Description

technical field

[0001] The invention relates to the field of catalysts, in particular to a methanol burning catalyst and a preparation method thereof, in particular to a methanol burning catalytic phase change medium sphere and a preparation method thereof. Background technique

[0002] Energy has an extremely important strategic position in the national economy. Solar energy, wind energy, and industrial waste heat have the advantages of large total amount and wide distribution. It has been widely used in recent years, but these energy sources have intermittent and unstable characteristics, which limit their efficient utilization. Heat storage technology is the key technology to solve these problems. Methanol has the characteristics of low boiling point and high octane number, making it a fuel with high oxygen content and weaker calorific value than gasoline, and its latent heat of vaporization is more than three times that of gasoline.

[0003] At the same time, because ...

Examples

Embodiment 1

[0047] The preparation method of the catalytic phase-change medium sphere of methanol combustion comprises the following steps:

[0048] 1) According to the mass ratio of sodium carbonate and sodium chloride of 1:1 binary molten salt high temperature phase change material 8g, palladium 0.05g, a-Al 2 o 3 81.6g, 0.15g of cerium dioxide, 0.15g of nano-titanium dioxide, 0.05g of nano-cerium oxide, and 10g of sodium silicate take each raw material;

[0049] 2) Palladium, a-Al 2 o 3 , cerium dioxide, nano-titanium dioxide and nano-cerium oxide are mixed uniformly, ground to ultra-fine micron level, and then binary molten salt high-temperature phase change material is added to disperse at a speed of 3500r / min for 30 minutes until uniform, and a premixed material is obtained;

[0050] 3) Add sodium silicate and water to the premix, fully stir, disperse and mix, and granulate. The diameter of the granulation is 16mm, and the pressure is 15mpa to obtain the primary product of medium ...

Embodiment 2

[0055] The preparation method of the catalytic phase-change medium sphere of methanol combustion comprises the following steps:

[0056] 1) According to the mass ratio of sodium carbonate and sodium chloride of 1:1 binary molten salt high temperature phase change material 8g, palladium 0.05g, a-Al 2 o 3 81.6g, 0.15g of cerium dioxide, 0.15g of nano-titanium dioxide, 0.05g of nano-cerium oxide, and 10g of sodium silicate take each raw material;

[0057] 2) the a-Al 2 o 3 Divided into two parts, the first part a-Al 2 o 3 with the second part a-Al 2 o 3 The mass ratio is 0.5, the first part of a-Al 2 o 3 Make a hollow sphere, and bond the binary molten salt high-temperature phase change material on the surface of the hollow sphere through sodium silicate, with a thickness of 20um, and dry at 80°C for 30min;

[0058] 3) Then with palladium, the second part a-Al 2 o 3 , cerium dioxide, nano-titanium dioxide and nano-cerium oxide were mixed and reacted for 15 minutes to o...

Embodiment 3

[0063] The preparation method of the catalytic phase-change medium sphere of methanol combustion comprises the following steps:

[0064] 1) 9.6g of high-temperature phase change material obtained by mixing sodium carbonate, potassium carbonate, lithium carbonate and magnesium oxide at a mass ratio of 1:1:1:0.65, rhodium 0.05g, a-Al 2 o 3 80.0g, 0.15g of copper oxide, 0.15g of a mixture of nano-tin oxide and nano-cadmium oxide with a mass ratio of 2:1, 0.05g of nano-tungsten oxide, and 10g of silicone resin. Weigh each raw material;

[0065] 2) Rhodium, a-Al 2 o 3 , copper oxide, nano-tin oxide, and nano-cadmium oxide with a mass ratio of 2:1 are mixed with nano-tungsten oxide evenly. After grinding to the ultra-fine micron level, add high-temperature phase change materials and disperse at a speed of 5000r / min for 30 minutes until uniform. get the premix;

[0066] 3) Add silicone resin and water to the premix, fully stir, disperse and mix, and granulate. The diameter of the...