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Preparation method of mesoporous alumina composite adsorbent functionalized by alkali metal

A mesoporous alumina, composite adsorption technology, applied in chemical instruments and methods, through adsorption, separation methods, etc., to achieve the effects of good adsorption performance, simple process and mild conditions

Inactive Publication Date: 2012-10-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method first needs to prepare the γ-Al2O3 carrier, and then prepare the product through impregnation and calcination. The process is complicated, and multiple calcinations will also affect the product. texture properties and increase energy consumption

Method used

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  • Preparation method of mesoporous alumina composite adsorbent functionalized by alkali metal
  • Preparation method of mesoporous alumina composite adsorbent functionalized by alkali metal
  • Preparation method of mesoporous alumina composite adsorbent functionalized by alkali metal

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1: Preparation of Na-functionalized mesoporous γ-Al by solvent evaporation-induced self-assembly using F127 as template 2 o 3 base composite adsorbent

[0028] 18.75 g Al(NO 3 ) 3 9H 2 O was dissolved in 9 ml of deionized water, 3.2 g of template agent F127 was added, fully stirred at 40 °C for 36 h, and then allowed to stand for 6 h; then, under slow stirring, 32.9% Na 2 CO 3Solution 17.3 ml, the resulting product was evaporated at 100 °C to induce self-assembly for 24 h, washed with 30 ml of deionized water and 20 ml of absolute ethanol in turn, and dried at 60 °C for 12 h, under air atmosphere, 600 ℃ calcination for 2 h, heating rate 1 ℃ / min, prepared Na-functionalized mesoporous γ-Al 2 o 3 Solid base composite material with a specific surface area of ​​135.4 m 2 / g, the pore volume is 0.43 cm 3 / g, the average pore diameter is 12.6 nm, the sample is CO at room temperature 2 The adsorption capacity is 0.5 mmol / g (see Table 1, figure 1 and image 3...

Embodiment 2

[0030] Example 2: Preparation of Na-functionalized mesoporous γ-Al by hydrothermal method using F127 as template 2 o 3 base composite adsorbent

[0031] 18.75 g Al(NO 3 ) 3 9H 2 O was dissolved in 9 ml of deionized water, 3.2 g of template agent F127 was added, fully stirred at 40 °C for 36 h and then allowed to stand for 6 h; then Na was added dropwise with a mass fraction of 32.9 % at 40 °C under slow stirring 2 CO 3 solution of 17.3 ml, the resulting product was transferred to a hydrothermal kettle, heated at 90 °C for 36 h, washed with 30 ml of deionized water and 20 ml of absolute ethanol in turn, dried, and roasted at 600 °C for 2 h in an air atmosphere. Heating rate 1℃ / min, Na-functionalized mesoporous γ-Al was prepared 2 o 3 Solid base composite material with a specific surface area of ​​185.6 m 2 / g, the pore volume is 0.86 cm 3 / g, the average pore diameter is 18.6 nm, the sample is CO at room temperature 2 The adsorption capacity is 0.7 mmol / g (see Table 1...

Embodiment 3

[0033] Example 3: Preparation of Na-functionalized mesoporous γ-Al by solvent evaporation-induced self-assembly using F127 as template 2 o 3 base composite adsorbent

[0034] 12.07 g AlCl 3 ·6H 2 O was dissolved in 12 ml of deionized water, 3.2 g of template agent F127 was added, fully stirred at 40 °C for 36 h and then allowed to stand for 6 h; then 30% Na at 40 °C was added dropwise under slow stirring. 2 CO 3 The solution was 19 ml, and the product obtained was self-assembled by solvent evaporation at 100 °C for 24 h, washed with 30 ml of deionized water and 20 ml of absolute ethanol in turn, dried, and calcined at 600 °C for 2 h in an air atmosphere with a heating rate of 1 ℃ / min to prepare Na-functionalized mesoporous γ-Al 2 o 3 Solid base composite material with a specific surface area of ​​217.4 m 2 / g, the pore volume is 0.53 cm 3 / g, the average pore diameter is 9.7 nm, the sample is CO at room temperature 2 The adsorption capacity is 1.4 mmol / g (see Table 1,...

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Abstract

The invention discloses a preparation method of a mesoporous alumina composite adsorbent functionalized by alkali metal. The method comprises the following steps of: firstly fully agitating and uniformly mixing aluminum salt solution and Pluronic triblock copolymer solution, dropwise adding carbonate solution of the alkali metal in the case of slow agitation, and preparing the mesoporous alumina composite adsorbent functionalized by alkali metal from the obtained sediment via washing, drying and calcining of deionized water and absolute ethyl alcohol after solvent evaporation induced self-assembly or hydro-thermal treatment. The preparation method disclosed by the invention has the advantages of simple process, mild condition, low material cost, in-situ one-pot liquid-phase introduction of alkali metal components and carrier components and the like, and the obtained mesoporous alumina base composite material functionalized by Na- and K- has excellent adsorptive property on greenhouse gases CO2 (carbon dioxide) and highly toxic pollutants Cr (chromium)(VI) in a water body.

Description

technical field [0001] The invention belongs to the field of preparation and adsorption application of mesoporous alumina materials, specifically a method for CO 2 Preparation method of alkali metal functionalized mesoporous alumina-based composite adsorbent adsorbed with Cr(VI). Background technique [0002] In recent years, climate warming caused by the "greenhouse effect" has become a global environmental problem, and CO produced by fossil fuel combustion 2 is the main cause of global warming. CO 2 The capture and storage of CO2 is regarded as one of the most effective means of reducing greenhouse gas emissions, and currently CO 2 The capture and separation methods mainly include solvent absorption method, membrane separation method and porous solid adsorption method. Solvent absorption method can well achieve CO 2 separation, but the energy consumption is high, the cost is high, and the equipment is seriously corroded; the membrane material in the membrane separatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02C02F1/28C02F1/62C02F101/22
CPCY02C10/08Y02C20/40
Inventor 蔡卫权陈浩葛锦蓉余家国胡玉珍程蓓党成雄
Owner WUHAN UNIV OF TECH
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