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Highly thermostable and ordered mesoporous alumina material and preparation method thereof

A mesoporous alumina and ordered mesoporous technology, applied in the direction of alumina/aluminum hydroxide, can solve the problems of low specific surface area and pore volume of mesoporous alumina materials, reduce the synthesis cost, the process is simple and easy, Environmentally friendly effect

Inactive Publication Date: 2014-01-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of zirconium species with relatively large atomic weight will inevitably result in relatively low specific surface area and pore volume of mesoporous alumina materials, of which the specific surface area is only 200-300 m 2 / g

Method used

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  • Highly thermostable and ordered mesoporous alumina material and preparation method thereof
  • Highly thermostable and ordered mesoporous alumina material and preparation method thereof
  • Highly thermostable and ordered mesoporous alumina material and preparation method thereof

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Effect test

Embodiment 1

[0028] 3.2g EO 106 PO 70 EO 106 and 0.6g of citric acid were added to 20mL of ethanol solution containing 1.6g of 12M hydrochloric acid, stirred at room temperature to completely dissolve the surfactant, and a clear solution A was obtained. At room temperature, 8.25g Al(NO 3 ) 3 9H 2 O was dissolved in 20 mL of anhydrous ethanol solution containing 1 g of deionized water, put into a sealed autoclave, and subjected to solvothermal pretreatment at 80 °C for 4 hours to obtain jelly-like gel B. Under vigorous stirring, add gel B to solution A, and continue stirring at 30°C for 24 hours, then pour the reaction mixture into a petri dish, and volatilize ethanol and water at 45°C for 48 hours. Finally, the sample was heat-treated at 100°C for 24 hours and calcined at 550°C for 5 hours to obtain figure 1 The shown mesoporous alumina material with a highly ordered two-dimensional hexagonal mesoporous structure. figure 2The nitrogen adsorption-desorption isotherm and the correspo...

Embodiment 2

[0031] 2g EO 30 PO 70 EO 30 and 0.6g of citric acid were added to 20mL of ethanol solution containing 1.6g of 12M hydrochloric acid, stirred at room temperature to completely dissolve the surfactant, and a clear solution A was obtained. At room temperature, 8.25g Al(NO 3 ) 3 9H 2 O was dissolved in 20 mL of anhydrous ethanol solution containing 1 g of deionized water, put into a sealed autoclave, and subjected to solvothermal pretreatment at 80 °C for 4 hours to obtain jelly-like gel B. Under vigorous stirring, add gel B to solution A, and continue stirring at 30°C for 24 hours, then pour the reaction mixture into a petri dish, and volatilize ethanol and water at 45°C for 48 hours. Finally, the sample was heat-treated at 100°C for 24 hours and calcined at 550°C for 5 hours to obtain a mesoporous alumina material with a highly ordered two-dimensional hexagonal mesoporous structure. Nitrogen adsorption results show that the mesopore diameter is 6.1nm and the specific surfa...

Embodiment 3

[0034] 3.2g EO 106 PO 70 EO 106 and 0.8g of citric acid were added to 20mL of ethanol solution containing 2g of 12M hydrochloric acid and 1g of deionized water, stirred at room temperature to completely dissolve the surfactant, and a clear solution A was obtained. At room temperature, 10.2g Al 2 (SO 4 ) 3 18H 2 O was dissolved in 20 mL of anhydrous ethanol solution containing 3 g of deionized water, put it into a sealed autoclave, and pretreated with solvent heat at 80 °C for 4 hours to obtain jelly-like gel B. Under vigorous stirring, add gel B to solution A, and continue stirring at 30°C for 24 hours, then pour the reaction mixture into a petri dish, and volatilize ethanol and water at 45°C for 48 hours. Finally, the sample was heat-treated at 100°C for 24 hours and calcined at 550°C for 5 hours to obtain a mesoporous alumina material with a highly ordered two-dimensional hexagonal mesoporous structure. Nitrogen adsorption results show that the mesopore diameter is 5....

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Abstract

The invention relates to a highly thermostable and ordered mesoporous alumina material and a preparation method thereof and belongs to the field of preparation of inorganic porous materials and catalysts. Inorganic aluminum thermally pretreated by a solvent is used as a precursor and interacts with segmented copolymer template agent micelles through solvent evaporation-induced self-assembly to obtain a mesoporous alumina material with a highly ordered mesoporous structure and high thermal stability. The mesoporous alumina material has a mesopore diameter of 4.0-10.0 nm, a specific surface area of 200-400 m<2> / g and a pore volume of 0.3-1.0 cm<3> / g; after the mesoporous alumina material is baked for 1 hour at high temperature of 1,000 DEG C, the structure property does not change, the reduced degree of the specific surface area is not more than 44%, and the reduced degree of the pore volume is not more than 47%. A preparation process of the mesoporous alumina material is simple and easy to operate, high in repetition rate, environment-friendly and capable of greatly reducing the production cost of the mesoporous alumina material.

Description

technical field [0001] The invention relates to a mesoporous material, which belongs to the field of preparation of inorganic porous materials and catalysts. Specifically, the present invention relates to a mesoporous alumina material with high specific surface area and pore volume, highly ordered mesoporous structure, and high thermal stability and a preparation method thereof. Background technique [0002] Due to its good mechanical strength, high chemical stability, suitable isoelectric point, adjustable surface acid / alkaline, and various crystal phase structures, mesoporous alumina materials have become a popular choice in the chemical and petroleum industries. The most widely used catalyst or catalyst carrier in the world plays an important role in the reaction process of petroleum group cracking, hydrofinishing, hydrodesulfurization, hydrogen production from hydrocarbon reforming, gas phase oil component purification, and automobile exhaust purification. effect. [0...

Claims

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Application Information

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IPC IPC(8): C01F7/02
Inventor 潘大海李瑞丰王旭郭敏于峰贺敏马静红
Owner TAIYUAN UNIV OF TECH
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