Method for preparing TiO2/gamma-Al2O3 composite carrier

A technology of composite carrier and co-precipitation method, which is applied in the direction of catalyst carrier, chemical instrument and method, chemical/physical process, etc. It can solve the problems of insufficient consistency of composite carrier components, insufficient specific surface area of ​​carrier, and suboptimal reaction conditions, etc. , to achieve the effect of uniform composite carrier components, consistent components, and good thermal stability

Inactive Publication Date: 2008-08-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the preparation and selection of reaction conditions by coprecipitation method is not optimal, the components of the composite carrier obtained are not consistent enough, not uniform enough, and the specific surface area of ​​the obtained carrier is not large enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) New TiO 2 / γ-Al 2 o 3 Composite carrier is based on titanium tetrachloride (TiCl 4 ) and aluminum nitrate (Al(NO 3 ) 3 9H 2 The precursor of O) is the raw material, according to the composition TiO 2 and Al 2 o 3 The mass percentage is TiO 2 :Al 2 o 3 =3:17 Calculate the corresponding titanium tetrachloride (TiCl 4 ) and aluminum nitrate (Al(NO 3 ) 3 9H 2 O) quality, add water to dissolve.

[0017] (2) Prepare TiCl with a concentration of 0.35mol / L 4 Solution (A): Add a certain amount of hydrochloric acid into an appropriate amount of water, stir to make the mixture uniform, and make the pH of the solution 4 Add it dropwise into the hydrochloric acid solution, stir evenly, place the solution in an ice-water bath, and keep stirring for 1 hour to prepare 0.35mol / L TiCl 4 Solution (A).

[0018] (3) Weigh the calculated amount of Al(NO 3 ) 3 9H 2 O crystals, add deionized water and stir to dissolve evenly, and prepare 2.08mol / L Al(NO 3 ) 3 Solution...

Embodiment 2

[0022] ●Weigh aluminum nitrate (Al(NO 3 ) 3 9H 2 O) 63.17g in a 500mL beaker, add 100mL deionized water, stir to dissolve completely, and prepare the concentration to be 2.08mol / L Al(NO 3 ) 3 aqueous solution.

[0023] ●Add 20mL of deionized water to another clean beaker, add 5mL of concentrated hydrochloric acid, stir well; put pure TiCl 4 Add it dropwise into the hydrochloric acid solution, stir evenly, then add 30ml of deionized water to the beaker, place the solution in an ice-water bath, and keep stirring for 1h to prepare 0.35mol / L TiCl 4 solution.

[0024] ●To be Al(NO 3 ) 3 After the temperature of the solution was raised to room temperature, the TiCl 4 The solution was slowly poured into Al(NO 3 ) 3 In solution (B), TiCl is obtained 4 and Al(NO 3 ) 3 mixed solution.

[0025] ● Weighing (NH 4 ) 2 CO 3 Solid 28.34g, add the deionized water dissolving of 100ml, be mixed with (NH 4 ) 2 CO 3 solution.

[0026] ●Water (NH 4 ) 2 CO 3 Solution and the ...

Embodiment 3

[0028] The influence of different preparation methods on the specific surface area of ​​the product is shown in Table 1

[0029] Preparation

[0030] TiO prepared by co-current co-precipitation 2 / γ-Al 2 o 3 The composite carrier has the largest specific surface area.

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Abstract

The invention relates to a preparation method of TiO2/Gamma-Al2O3 composite carrier. The weight percent of TiO2 in the chemical composition of the composite carrier is 15 percent, and the composite carrier has the precursors of titanium tetrachloride (TiCl4) and aluminum nitrate (Al(NO3)3 9H2O) as raw materials, and adopts concurrent co-precipitation method to prepare. The precipitation gets a TiO2/Gamma-Al2O3 composite carrier with a 292.6m<2>/g specific surface area after drying for 24h under a temperature of 110 DEG C in oven and roasting for 2h under the temperature of 500 DEG C in muffle furnace. The preparation method of TiO2/Gamma-Al2O3 composite carrier has the advantages of simple technology, convenient operation, and even components. Meanwhile, the composite carrier has the specific surface area which is bigger 50 to 100m<2>/g than ordinary titanium-aluminum bi-oxide, can play the role of the carrier of catalysts, and also is suitable to be used as the carrier of plasma-catalytic coordination de-NO catalyst.

Description

technical field [0001] The invention provides a novel TiO 2 / γ-Al 2 o 3 The preparation method of composite carrier, its specific surface area (292.6m 2 / g) than single TiO 2 and γ-Al 2 o 3 And the titanium-aluminum composite oxide is much larger and has good thermal stability, and can be used as a carrier of a catalyst, and is also particularly suitable for a carrier of a plasma-catalyzed synergistic NO removal catalyst. Background technique [0002] Nitrogen oxides (NO x ) is one of the main pollutants causing air pollution. NO x emissions have brought serious harm to the global environment. Traditional treatment methods include liquid absorption method, activated carbon adsorption method, catalytic oxidation and other methods, but there are many shortcomings. Discovery and Research Discovery to TiO 2 The catalyst as a carrier has the advantages of high activity, good selectivity, strong anti-poisoning, good activity at low temperature, adjustable surface acidit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/06B01J21/04B01J35/10
Inventor 蒋晓原林辉李惠娟郑小明
Owner ZHEJIANG UNIV
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