Mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and preparation method thereof

A technology of phase change materials and aluminosilicates, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of fly ash dependence and restrict the development of traditional energy industries, and achieve continuous load, low leakage rate, High heat storage efficiency

Active Publication Date: 2017-05-31
华东理工常熟研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of fly ash that has not been effectively utilized depends on landfill disposal, which has brought h

Method used

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  • Mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and preparation method thereof
  • Mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and preparation method thereof
  • Mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and preparation method thereof

Examples

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Example Embodiment

[0036] Such as figure 1 As shown, a method for preparing an aluminosilicate-based shaped phase change material prepared from fly ash according to the present invention includes the steps:

[0037] Step 1): Mix the fly ash with one or more of alkali metal or alkaline earth metal carbonates, hydroxides or oxides and then roast them at a high temperature, and quench the roasted products;

[0038] Step 2): Grind the quenched roasted sample prepared in step 1) and perform a solid-liquid reaction with an acid solution;

[0039] Step 3): After the solid-liquid reaction is completed, the solid powder obtained by the solid-liquid separation is dried to obtain mesoporous aluminosilicate powder;

[0040] Step 4): Put the mesoporous aluminosilicate powder prepared in step 3) under vacuum and maintain the same temperature as the phase change temperature of the supported phase change material, and then charge an excess of the molten phase Change the material, make the mixture, and continue to maint...

Example Embodiment

[0044] Example 1

[0045] Step 1): After mixing sodium carbonate and fly ash at a mass ratio of 30:100, roasting at 870°C for 45 minutes, and quenching the roasted product;

[0046] Step 2): Grind the quenched roasted powder prepared in step 1) and react with 20% HCl acid solution at 25°C for 15 minutes;

[0047] Step 3): After the solid-liquid reaction is completed, the solid powder obtained by solid-liquid separation is dried to obtain mesoporous aluminosilicate powder with wedge-shaped pores, and the ratio of aluminum to silicon moles in the obtained product is 0.7:1;

[0048] Step 4): Put the wedge-shaped mesoporous aluminosilicate powder prepared in step 3) under a vacuum of 30kPa, and maintain the phase change material lauric acid, myristic acid and stearic acid (LA- PA-SA) The eutectic phase transition temperature is 31.76℃, and then it is filled with excess lauric acid in the molten state. The mixture is prepared after 30 minutes, and the vacuum of 30kPa is maintained for 30 m...

Example Embodiment

[0051] Example 2

[0052] Mix 1 part of calcium carbonate with 0.5 part of sodium hydroxide, mix the mixture with fly ash in a mass ratio of 50:100, and then roast at 1150°C for 60 minutes, and then quench the roasted product;

[0053] Step 2): Grind the quenched roasted powder prepared in step 1) and react with 20% HCl acid solution at 60°C for 60 minutes;

[0054] Step 3): After the solid-liquid reaction is completed, the solid powder obtained by solid-liquid separation is dried, and the product with the molar ratio of aluminum to silicon in the obtained product is about 4:1 to obtain mesoporous aluminum-silicon with plate-shaped pores Salt powder

[0055] Step 4): Place the flat-porous mesoporous aluminosilicate powder prepared in step 3) under a vacuum of 80kPa and maintain the eutectic phase transition temperature of lauric acid and myristic acid of 33.62 with the supported phase change material. ℃ the same temperature, and then filled with excess molten lauric acid and myristic...

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Abstract

The invention belongs to the recycling utilization field of phase change heat storage materials and solid waste, and in particular relates to a mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and a preparation method thereof. Mesoporous aluminum silicate is used as a carrier of the mesoporous-aluminosilicate-based shaping phase change material, an eutectic phase change material is used as a loading substance, the mesoporous-aluminosilicate-based shaping phase change material is prepared by the following method: 1) mixing the fly ash and additives, then calcining, and quenching the calcined product; 2) performing controlled acid etching; 3) drying solid-liquid separation powder to prepare mesoporous aluminosilicate powder; 4) placing the mesoporous aluminosilicate powder in vacuum conditions, and filling with an excess molten state phase change material to obtain a mixture; 5) performing solid-liquid separation of the mixture to prepare solid powder, cleaning with a solvent, and drying to obtain the mesoporous-aluminosilicate-based shaping phase change material. Channels of the cylindrical or wedge-shaped mesoporous-aluminosilicate-based shaping phase change material prepared by the method are tapered, loading of the phase change material is more continuous, compatibility is increased, and leakage rat is reduced.

Description

technical field [0001] The invention belongs to the field of phase-change heat storage materials and the field of solid waste recycling and utilization, and specifically relates to a mesoporous aluminosilicate-based shaped phase-change material prepared by using fly ash and a preparation method thereof. Background technique [0002] The fixed phase change material is a composite material that does not change in volume during the phase change process obtained by loading the phase change material into a porous carrier. The shaped phase change material can disperse the phase change material into many independent energy storage units to improve thermal conductivity, and the capillary tension formed by the small pores of the carrier can avoid the leakage of the phase change material. Stereotyped phase change materials can solve the imbalance of energy supply and demand in the distribution of space and time and have great potential to improve energy utilization, so they have becom...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 乔秀臣李辰晨
Owner 华东理工常熟研究院有限公司
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